bluuebunny/crossref_metadata_2025_split huggingface dataset:
Enhancing mechanical and electrical properties of phthalic anhydride‐based unsaturated polyester resin by structural modification using methylhexahydrophthalic anhydride
Authors: Pham Anh‐Tuan , Do Khanh Duy , Ha Huong Thu , Mai Quan Doan , Tran Dieu Vinh 
Published: April 2023

AbstractThis work investigates the influence of methylhexahydrophthalic anhydride (MHHPA) on the properties of phthalic anhydride‐based unsaturated polyester resin (PA‐based UPR) when PA is replaced by MHHPA with different PA/MHHPA mole ratios, ranging from 100/0 to 0/100. Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) are used to study the chemical structure, curing process and mechanical properties of the resins, showing the successful incorporation of MHHPA into the structure of UPRs with superior properties, compare to PA‐based UPRs. In particular, the addition of MHHPA significantly lowers the acidity by up to 28% and promotes the curing reaction, reducing the enthalpy of the reaction by 2.5 times, and shortens the curing time by up to 40%. This incorporation also increases the gel content up to 99.9%, thereby increasing the crosslinking between the polyester chains and improving the rigidity of UPRs. In addition, the glass‐transition temperature of the polymer increases approximately 78%, which can improve the working temperature of the MHHPA‐modified UPRs. The electrical properties of the resins containing MHHPA reveal better insulating performance in comparison with the PA‐based UPR. These findings demonstrate great potentials of the MHHPA‐modified UPRs for various applications, especially in outdoor environments.
Degradation of poly(1,3‐dioxolane). Depolymerization versus hydrolysis
Authors: Kubisa Przemyslaw 
Published: April 2023

AbstractThere is renewed interest in polymers of 1,3‐dioxolane (DXL), especially as components of degradable polymer networks. DXL, a five‐membered cyclic acetal, is easily available on a commercial scale. Due to the relatively low strain of the five‐membered ring, its polymerization proceeding by a cationic mechanism is reversible. Above the ceiling temperature in the presence of an acid catalyst, it therefore undergoes depolymerization and this is one of the possible ways of degradation. On the other hand, monomeric units within the poly(1,3‐dioxolane) (PDXL) chain are connected by acetal bonds that are susceptible to acid‐catalyzed hydrolysis and this offers an alternative route for PDXL chain degradation. Polymer networks with connecting PDXL blocks are designed as commodity plastic materials but also as gels intended for biomedical applications. In both applications the possibility of gel disintegration by controlled degradation of connecting PDXL blocks is advantageous. The degradation in the two instances should proceed under different conditions, however. Degradation of commodity plastic material may proceed at higher temperatures in ‘dry’ conditions while biomaterials should degrade at mild physiological temperatures in an aqueous environment. In published papers, the distinction between the two routes of degradation is not always considered. In the present mini‐review, both mechanisms of degradation are presented and the available information on PDXL bloc degradation is critically evaluated. © 2023 Society of Industrial Chemistry.
Effect of isopropanol cosolvent on the rheology and spinnability of aqueous polyacrylic acid solutions
Authors: Khandavalli Sunilkumar , Chen Yingying , Sharma‐Nene Nisha , Rajan Kashyap Sundara , Sur Samrat , Rothstein Jonathan P. , Reeves Kimberley S. , Cullen David A. , Neyerlin K. C. , Mauger Scott A. , Ulsh Michael 
Published: April 2023

AbstractWe investigate the effect of alcohol fraction (isopropanol, IPA) in a binary water‐alcohol solvent mixture on the shear and extensional rheological properties, as well as the role of viscoelasticity on fiber formation of poly(acrylic acid) (PAA) in electrospinning. Comparison of the scaling of both specific viscosities ηsp and extensional relaxation times λE of PAA in water–IPA mixtures, showed stronger scaling compared to salt‐free aqueous polyelectrolyte solutions, except for the ηsp in the unentangled regime displaying a polyelectrolyte‐like scaling ηsp ~ c0.5 for all IPA%. Such deviation suggested IPA induces association/aggregation of PAA. However, the trends between ηsp and λE magnitudes as a function of IPA% differ for concentrations compared in the entangled regime. The ηsp as well as their elastic moduli exhibit a maximum, whereas λE increases monotonically with IPA%, suggesting a complex interplay of various interactions are dictating their structure in water‐IPA mixtures, affecting their shear and extensional response differently. Electrospinning experiments showed increasing IPA% reduces the onset of both beaded and uniform fibers. Analysis using dimensionless numbers indicated the enhancement of their elasticity by IPA, and the consequent stabilizing effect on their jets/filaments against break‐up during electrospinning, plays a role in the improvement of their fiber formation.
Fluorine‐phosphate copolymerization waterborne acrylic resin coating with enhanced anticorrosive performance
Authors: Gao Fengjun , Liu Yan , Jiao Cuiyan , El‐Bahy Salah M. , Shao Qian , El‐Bahy Zeinhom M. , Li Handong , Wasnik Priyanka , Algadi Hassan , Xu Ben Bin , Wang Ning , Yuan Yihui , Guo Zhanhu 
Published: April 2023

AbstractThe modified waterborne acrylic resin was synthesized successfully by emulsion polymerization with octafluoropentyl methacrylate and phosphate functional monomer as monomers, showing an improved anti‐corrosion performance of the resin coating. The existence and general distribution of the elements of the modified monomer in the emulsion were explored, and the anti‐corrosion mechanism was disclosed. The results show that the modification of octafluoropentyl methacrylate and phosphate functional monomers improved the water resistance, corrosion resistance and thermal stability of acrylic resins. Compared with unmodified acrylic resin, the contact angle of the modified resin was increased from 74.23° to 83.51°, and the initial decomposition temperature was increased from 264 to 305 °C. At the same time, the corrosion voltage of the modified resin was increased, the corrosion current density was decreased, and the salt spray resistance was improved. This study provides a new way for the preparation of environmentally friendly, stable, and corrosion‐resistant waterborne acrylic resins.
Epigallocatechin‐3‐gallate in combination with corticosteroids mitigates heat stress‐induced acute kidney injury through modulating heat shock protein 70 and toll‐like receptor 4‐dependent pathways
Authors: Shafeek Faten , El‐Kashef Dalia H. , Abu‐Elsaad Nashwa , Ibrahim Tarek 
Published: April 2023

AbstractRecently, recurrent heat stress (HS) and dehydration have been exhibited to give rise to kidney disease epidemic in hot regions. The current study was carried out to estimate a possible renoprotective effect of dexamethasone (Dexa) and epigallocatechin‐3‐gallate (EGCG) as a heat shock protein (HSP)‐70 inhibitor on HS‐induced nephropathy. In total, five groups of rats were used: control group, HS group (exposed to heat for 40 min), Dexa+HS group (rats were injected with Dexa i.p.15 mg/kg/day for 3 days followed by HS), EGCG+HS group (rats received EGCG 100 mg/kg/day, orally, for 7 days followed by HS), and EGCG+ Dexa +HS group (rats received EGCG 100 mg/kg/day, orally, for 7 days and injected Dexa as described along the last 3 days followed by HS). Kidney sections were stained with H&E and scored for tubular injury. A marked increase in creatinine, urea, malondialdehyde (MDA), monocyte chemoattractant protein (MCP)‐1, HSP‐70, nuclear factor kappa B (NF‐κB), toll‐like receptor 4 (TLR‐4) and Caspase‐3 expression was observed after HS induction (p < 0.001). Treatment with EGCG combined with Dexa notably reduced tubular injury, MCP‐1, HSP‐70, NF‐κB, and TLR‐4 levels (p < 0.001). Moreover, it increased IL‐10, antioxidant capacity and Bcl‐2 expression levels in the kidney (p < 0.001). This renoprotective impact might be attributed to anti‐inflammatory, antioxidant, and anti‐apoptotic mechanisms besides interfering with TLR‐4‐mediated NF‐κB activation pathway.
Kaempferol induces mitochondrial dysfunction and mitophagy by activating the LKB1/AMPK/MFF pathway in breast precancerous lesions
Authors: Cao Jingyu , Ma Xinyi , Yan Xianxin , Zhang Guijuan , Hong Shouyi , Ma Ruirui , Wang Yanqiu , Ma Min 
Published: April 2023

AbstractKaempferol has been suggested to be an effective anticancer agent in several malignant tumors. However, its function and mechanisms in breast precancerous lesions remain largely elusive. Here, we showed that kaempferol induced excessive mitochondrial fission and mitochondrial damage with activated mitochondrial fission factor (MFF)‐mediated dynamin‐related protein (DRP) 1 mitochondrial translocation. As a result, the PTEN‐induced putative kinase 1 (PINK1)/Parkin signaling pathway was activated, accompanied by excessive mitophagy and reduced mitochondrial mass in cells. We also revealed that kaempferol‐induced lethal mitophagy contributed to inhibiting breast precancerous lesion growth in vitro and in vivo. Furthermore, we verified serine/threonine kinase 11 (STK11/LKB1)/AMP‐activated protein kinase (AMPK) pathway deficiency in breast precancerous lesions. Moreover, LKB1/AMPK pathway reactivation by kaempferol was required for excessive mitochondrial fission and lethal mitophagy. Taken together, our findings shed new light on the molecular mechanisms related to breast cancer prevention by kaempferol and provide evidence for its potential clinical application.
Cinnamaldehyde induces apoptosis and enhances anti‐colorectal cancer activity via covalent binding to HSPD1
Authors: Zhang Weiyi , Lei Wei , Shen Fukui , Wang Mukuo , Li Linlin , Chang Junmin 
Published: April 2023

AbstractColorectal cancer (CRC) is a common malignant tumor with high morbidity and mortality rates worldwide. Although surgical resection and adjuvant radiotherapy/chemotherapy are the mainstays of CRC treatment, the efficacy is unsatisfactory due to several limitations, including high drug resistance. Accordingly, there is a dire need for new drugs or a novel combination approach to treat this patient population. Herein, we found that cinnamaldehyde (CA) could exert an antitumor effect in HCT‐116 cell lines. Target fishing, molecular imaging, and live‐cell tracing using an alkynyl–CA probe revealed that the heat shock 60 kDa protein 1 (HSPD1) protein was the target of CA. The covalent binding of CA with HSPD1 altered its stability. Furthermore, our results demonstrated that CA could induce cell apoptosis by inhibiting the PI3K/Akt signaling pathway and enhanced anti‐CRC activity both in vitro and in vivo. Meanwhile, CA combined with different chemotherapeutic agents was beneficial to patients resistant to anti‐CRC drug therapy.
Facile and Scalable Mechanochemical Synthesis of Defective MoS2 with Ru Single Atoms Toward High‐Current‐Density Hydrogen Evolution
Authors: Lang Chengguang , Jiang Wenbin , Yang Cheng‐Jie , Zhong Hao , Chen Peirong , Wu Qilong , Yan Xuecheng , Dong Chung‐Li , Lin Yue , Ouyang Liuzhang , Jia Yi , Yao Xiangdong 
Published: April 2023

AbstractDesigning a facile strategy to prepare catalysts with highly active sites are challenging for large‐scale implementation of electrochemical hydrogen production. Herein, a straightforward and eco‐friendly method by high‐energy mechanochemical ball milling for mass production of atomic Ru dispersive in defective MoS2 catalysts (Ru1@D‐MoS2) is developed. It is found that single atomic Ru doping induces the generation of S vacancies, which can break the electronic neutrality around Ru atoms, leading to an asymmetrical distribution of electrons. It is also demonstrated that the Ru1@D‐MoS2 exhibits superb alkaline hydrogen evolution enhancement, possibly attributing to this electronic asymmetry. The overpotential required to deliver a current density of 10 mA cm−2 is as low as 107 mV, which is much lower than that of commercial MoS2 (C‐MoS2, 364 mV). Further density functional theory (DFT) calculations also support that the vacancy‐coupled single Ru enables much higher electronic distribution asymmetry degree, which could regulate the adsorption energy of intermediates, favoring the water dissociation and the adsorption/desorption of H*. Besides, the long‐term stability test under 500 mA cm−2 further confirms the robust performance of Ru1@D‐MoS2. Our strategy provides a promising and practical way towards large‐scale preparation of advanced HER catalysts for commercial applications.
Self‐Compositing: A Efficient Method of Improving the Electrical Conductivity of Graphene Nanoplatelet/Thermosetting Resin Composites
Authors: Qiu Xiaowen , Lin Zewen , Zhao Yanan , Zhang Jinmeng , Hu Xiaolan , Bai Hua 
Published: April 2023

AbstractConductive composites based on thermosetting resins have broad applications in various fields. In this paper, a new self‐compositing strategy is developed for improving the conductivity of graphene nanoplatelet/thermosetting resin composites by optimizing the transport channels. To implement this strategy, conventional graphene nanoplatelet/thermosetting resin is crushed into micron‐sized composite powders, which are mixed with graphene nanoplatelets to form novel complex fillers to prepare the self‐composited materials with thermosetting resins. A highly conductive compact graphene layer is formed on the surface of the crushed composite powders, while the addition of the micron‐sized powder induces the orientation of graphene nanoplatelets in the resin matrix. Therefore, a highly conductive network is constructed inside the self‐composited material, significantly enhancing the electrical conductivity. The composite materials based on epoxy resin, cyanate resin, and unsaturated polyester are prepared with this method, reflecting that the method is universal for preparing composites based on thermosetting resins. The highest electrical conductivity of the self‐composited material based on unsaturated polyester is as high as 25.9 S m−1. This self‐compositing strategy is simple, efficient, and compatible with large‐scale industrial production, thus it is a promising and general way to enhance the conductivity of thermosetting resin matrix composites.
Low‐Temperature Chemical Bath Deposition of Conformal and Compact NiOXfor Scalable and Efficient Perovskite Solar Modules
Authors: Li Sibo , Wang Xin , Li Huan , Fang Jun , Wang Daozeng , Xie Guanshui , Lin Dongxu , He Sisi , Qiu Longbin 
Published: April 2023

AbstractA scalable and low‐cost deposition of high‐quality charge transport layers and photoactive perovskite layers are the grand challenges for large‐area and efficient perovskite solar modules and tandem cells. An inverted structure with an inorganic hole transport layer is expected for long‐term stability. Among various hole transport materials, nickel oxide has been investigated for highly efficient and stable perovskite solar cells. However, the reported deposition methods are either difficult for large‐scale conformal deposition or require a high vacuum process. Chemical bath deposition is supposed to realize a uniform, conformal, and scalable coating by a solution process. However, the conventional chemical bath deposition requires a high annealing temperature of over 400 °C. In this work, an amino‐alcohol ligand‐based controllable release and deposition of NiOXusing chemical bath deposition with a low calcining temperature of 270 °C is developed. The uniform and conformal in‐situ growth precursive films can be adjusted by tuning the ligand structure. The inverted structured perovskite solar cells and large‐area solar modules reached a champion PCE of 22.03% and 19.03%, respectively. This study paves an efficient, low‐temperature, and scalable chemical bath deposition route for large‐area NiOXthin films for the scalable fabrication of highly efficient perovskite solar modules.
N‐Doping Coupled with Co‐Vacancies Activating Sulfur Atoms and Narrowing Bandgap for CoS Toward Synergistically Accelerating Hydrogen Evolution
Authors: Zeng Ping , Meng Yang , Liu Zhan , Sun Guo‐Qi , Li Xiao‐Yun , Yang Xiao‐Yu , Ye Cui‐Fang , Li Yu , Liu Jin‐Ping , Chen Li‐Hua , Su Bao‐Lian , Wang Yi‐Long 
Published: April 2023

AbstractThe combination of hetero‐elemental doping and vacancy engineering will be developed as one of the most efficient strategies to design excellent electrocatalysts for hydrogen evolution reaction (HER). Herein, a novel strategy for N‐doping coupled with Co‐vacancies is demonstrated to precisely activate inert S atoms adjacent to Co‐vacancies and significantly improve charge transfer for CoS toward accelerating HER. In this strategy, N‐doping favors the presence of Co‐vacancies, due to greatly decreasing their formation energy. The as‐developed strategy realizes the upshift of S 3p orbitals followed by more overlapping between S 3py and H 1s orbitals, which results in the favorable hydrogen atom adsorption free energy change (ΔGH) to activate inert S atoms as newborn catalytical sites. Besides, this strategy synergistically decreases the bandgap of CoS, thereby achieving satisfactory electrical conductivity and low charge‐transfer resistance for the as‐obtained electrocatalysts. With an excellent HER activity of −89.0 mV at 10.0 mA cm−2 in alkaline environments, this work provides a new approach to unlocking inert sites and significantly improving charge transfer toward cobalt‐based materials for highly efficient HER.
Facile Control of Ferroelectricity Driven by Ingenious Interaction Engineering
Authors: Li Jun‐Yi , Zhang Tie , Lun Meng‐Meng , Zhang Yi , Chen Li‐Zhuang , Fu Da‐Wei 
Published: April 2023

AbstractConstruction of ferroelectric and optimization of macroscopic polarization has attracted tremendous attention for next generation light weight and flexible devices, which brings fundamental vitality for molecular ferroelectrics. However, effective molecular tailoring toward cations makes ferroelectric synthesis and modification relatively elaborate. Here, the study proposes a facile method to realize triggering and optimization of ferroelectricity. The experimental and theoretical investigation reveals that orientation and alignment of polar cations, dominated factors in molecular ferroelectrics, can be controlled by easily processed anionic modification. In one respect, ferroelectricity is induced by strengthened intermolecular interaction. Moreover, ≈50% of microscopic polarization enhancement (from 8.07 to 11.68 µC cm−2) and doubling of equivalent polarization direction (from 4 to 8) are realized in resultant ferroelectric FEtQ2ZnBrI3 (FEQZBI, FEtQ = N‐fluoroethyl‐quinuclidine). The work offers a totally novel platform for control of ferroelectricity in organic–inorganic hybrid ferroelectrics and a deep insight of structure–property correlations.
A Universal Synthesis Strategy for Lanthanide Sulfide Nanocrystals with Efficient Photocatalytic Hydrogen Production
Authors: Zhong Ziyun , Fu Hao , Wang Siyuan , Duan Yingnan , Wang Qinglun , Yan Chun‐Hua , Du Yaping 
Published: April 2023

AbstractAs an important lanthanide (Ln)‐based functional materials, the Ln chalcogenides possess unique properties and various applications. However, the controllable synthesis of Ln chalcogenide nanocrystals still faces great challenges because of the rather poor affinity between Ln and chalcogenide ions (S, Se, Te) as well as strong preference of combination with existed oxygen. Herein, a facile but general heterogeneous nucleation synthetic strategy is established toward a series of colloidal ternary Cu Ln sulfides nanocrystals using the Ln dithiocarbamates and CuI as precursors. To extend this synthetic protocol, similar strategy is used to prepare six kinds of high quality CuLnS2 nanocrystals, while the bulk ones are only obtained by the traditional solid‐state reaction at rigorous condition. Importantly, high‐entropy nanocrystals CuLnS2 and CuEuxLn2‐xS3 which contain six Ln elements (Nd, Sm, Gd, Tb, Dy) are readily obtained by the co‐decomposed process attributed to their similar diffusion speed. As a proof‐of‐concept application, CuEu2S3 nanocrystals showed efficient photocatalytic hydrogen production properties.
Construction of the Fast Potassiation Path in SbxBi1‐x@NC Anode with Ultrahigh Cycling Stability for Potassium‐Ion Batteries
Authors: Liu Junhao , Zhang Dantong , Cui Jie , Li Peihang , Xu Xijun , Liu Zhengbo , Liu Jiangwen , Peng Chao , Xue Dongfeng , Zhu Min , Liu Jun 
Published: April 2023

AbstractDue to the scarce of lithium resources, potassium‐ion batteries (PIBs) have attracted extensive attention due to their similar electrochemical properties to lithium‐ion batteries (LIBs) and more abundant potassium resources. Even though there is considerable progress in SbBi alloy anode for LIBs and PIBs, most studies are focused on the morphology/structure tuning, while the inherent physical features of alloy composition's effect on the electrochemical performance are rarely investigated. Herein, combined the nanonization, carbon compounding, and alloying with composition regulation, the anode of nitrogen‐doped carbon‐coated SbxBi1‐x (SbxBi1‐x@NC) with a series of tuned chemical compositions is designed as an ideal model. The density functional theory (DFT) calculation and experimental investigation results show that the K+ diffusion barrier is lower and the path is easier to carry out when element Bi dominates the potassiation reaction, which is also the reason for better circulation. The optimized Sb0.25Bi0.75@NC shows an excellent cycling performance with a reversible specific capacity of 301.9 mA h g−1 after 500 cycles at 0.1 A g−1. Meanwhile, the charge–discharge mechanism is intuitively invetigated and analyzed by in situ X‐ray diffraction (XRD) and transmission electron microscopy (TEM) in detail. Such an alloy‐type anode synthesis approach and in situ observation method provide an adjustable strategy for the designing and investigating of PIB anodes.
Solar‐Powered Interfacial Evaporation and Deicing Based on a 3D‐Printed Multiscale Hierarchical Design
Authors: Li Na , Shao Ke , He Jintao , Wang Shuxue , Li Shuai , Wu Xiaochun , Li Jingjing , Guo Cui , Yu Liangmin , Murto Petri , Chen Junwu , Xu Xiaofeng 
Published: April 2023

AbstractSolar‐powered interfacial heating has emerged as a sustainable technology for hybrid applications with minimal carbon footprints. Aerogels, hydrogels, and sponges/foams are the main building blocks for state‐of‐the‐art photothermal materials. However, these conventional three‐dimensional (3D) structures and related fabrication technologies intrinsically fail to maximize important performance‐enhancing strategies and this technology still faces several performance roadblocks. Herein, monolithic, self‐standing, and durable aerogel matrices are developed based on composite photothermal inks and ink‐extrusion 3D printing, delivering all‐in‐one interfacial steam generators (SGs). Rapid prototyping of multiscale hierarchical structures synergistically reduce the energy demand for evaporation, expand actual evaporation areas, generate massive environmental energy input, and improve mass flows. Under 1 sun, high water evaporation rates of 3.74 kg m−2 h−1 in calm air and 25.3 kg m−2 h−1 at a gentle breeze of 2 m s−1 are achieved, ranking among the best‐performing solar‐powered interfacial SGs. 3D‐printed microchannels and hydrophobic modification deliver an icephobic surface of the aerogels, leading to self‐propelled and rapid removal of ice droplets. This work shines light on rational fabrication of hierarchical photothermal materials, not merely breaking through the constraints of solar‐powered interfacial evaporation and clean water production, but also discovering new functions for photothermal interfacial deicing.