bluuebunny/crossref_metadata_2025_split huggingface dataset:
Comparison of constant spindle speed twisting technology and constant tension twisting technology of E‐glass yarn
Authors: Wang Xi , Chu Jiuying , Zuo Jing , Hu Lizhu 
Published: May 2024

AbstractThe rapid advancement of the electronics industry has continuously increased demands for the E‐glass yarn's quality and production capacity. The twisting and winding process stands out as a crucial step in E‐glass yarn production. Twisted bobbin yarns are produced separately using constant spindle speed technology and constant tension technology in order to address issues such as high yarn breakage rates and excessive yarn hairiness during twisting. By comparing the twisting tension, yarn breakage rates, and yarn hairiness between these two technologies, this study delves into the impact of twisting technology on E‐glass yarn quality and production capacity. The results indicate that, in comparison with constant spindle speed technology, constant tension technology reduces the unevenness ratio of twisting tension from 8.94% to 0.55%, decreases yarn breakage rates from 3.05% to 2.03%, reduces long hairiness by 20.3%, and reduces short hairiness by 25.1%. By reducing the spindle speed when the bobbin yarn's diameter increases, constant tension twisting technology reduces the unevenness ratio of twisting tension, yarn breakage rate, and yarn hairiness. These research findings lay the foundation for the development of high‐end E‐glass yarn products and carry significant practical value in improving yarn quality, enhancing production capacity, and reducing E‐glass yarn losses.Highlights
The twisting and winding principle of E‐glass yarn is revealed.
The relationship among four tensions in the twisting and winding process is clarified.
The parameters for the constant tension twisting technology are developed.
The measurement method for the twisting tension is improved.
Experimental study on the mechanical property of carbon fiber reinforced polymer with the combined application of digital twin and reduced order algorithm
Authors: Ji Xiukun , Wang Jinlong , Gong Yongjun , Bao Yongjie , Yang Yuxing 
Published: May 2024

AbstractRecognizing the anisotropy of mechanical property transfer between carbon fiber reinforced polymer (CFRP) layers, a unidirectional reduced‐order model (UROM) is proposed to comprehensively express the mechanical properties of each layer. A crucial focus is on effectively analyzing the real‐time mechanical properties of CFRP specimens, particularly in accurately identifying and predicting the interlaminar mechanical states of anisotropic CFRP laminated specimens. Moreover, the multi fidelity surrogate (MFS) is employed to replace the computationally intensive model, amalgamating high‐fidelity sensor data with low‐fidelity data obtained from the UROM. The UROM MFS is used to reduce the amount of data in the same layer of CFRP laminates, while preserving the characteristics between different layers and preserving the interlaminar information of CFRP laminates. Finally, the stress prediction results of the UROM MFS and the unreduced MFS model were compared and analyzed. The real‐time response speed of the u‐ROM MFS digital twin (DT) model was increased by 658%. The UROM MFS DT model effectively captures the mechanical properties of each layer of CFRP laminates, enables quick calculation of model parameters, and provides accurate predictions.Highlights
First, the interlayer mechanical property of CFRP is analyzed with the combined application of experimental data, DT model, and UROM MFS.
Second, MFS is employed to merge high‐fidelity sensor data of CFPR laminate with low‐fidelity data obtained from UROM.
Third, the digital twin framework for CFPR laminate with high response speed and calculation accuracy is proposed.
The effects of temperature and hygrothermal aging on the properties of CF/PA6 composite and its compression failure mechanisms
Authors: Yu Mingming , Xiao Rongbin , Xie Wang , Liu Xueqiang , Ge Lili , Fang Lin , Ren Musu , Sun Jinliang 
Published: May 2024

AbstractCarbon fiber reinforced polyamide composites have outstanding properties, but their applications are significantly affected by the service environment. This work evaluates the effects of temperature (25, 80, 140, and 200°C) and hygrothermal conditions on the mechanical properties of CF/PA6 composite containing delamination damage, and studies its damage behaviors and failure mechanisms. After hygrothermal aging, recrystallization of PA6 improves the heat resistance of CF/PA6 composites, but water absorption reduces the interfacial strength of composites, resulting in the decrease of modulus and compressive strength (24% and 42%, respectively). With the increase in temperature, the compressive strength of CF/PA6 composites gradually decreases (from 132 MPa at 25°C to 24 MPa at 200°C), and the failure mode transitions from fiber fractures, interlayer shear fractures, delamination to kinking. In addition, the compressive failure process of CF/PA6 composites is divided into three stages: buckling, delamination bulging and kinking failure.Highlights
Hygrothermal aging reduces the fiber/resin interface performance.
Fiber fracture, interlayer shear and delamination convert to kinking failure.
The failure process is divided into buckling, delamination and kinking.
Cover Image
Authors: Li Zhenzhen , Zhou Jian , Liu Guizhen , Wang Lin , Feng Zhiliang , Ding Zhongjun 
Published: May 2024

The cover image is based on the Research Article Properties of epoxy resin matrix composites improved by silica sol‐activated hollow ceramic microspheres by Zhenzhen Li et al., https://doi.org/10.1002/pc.28167.image
A new mechanism of mechanical reinforcement for 3D printing CF/PA12 composite based on microwave treatment
Authors: Zhang Huifang , Zhi Jieying , Lu Xiaoxuan , Peng Xuanzhi , Gao Xiaoqing , Yang Yu , Liu Zixuan , Cao Yang , Liu Qichao , Sun Youyi 
Published: May 2024

AbstractAlthough 3D printing technology has been widely applied in fabrication of polymer composite, yet, it still exhibits low mechanical performance, restricting its application in structural materials. Herein, a new 3D printing polymer composite composed of carbon fiber and polyamide12 (PA12) is fabricated and subsequently treated by microwave treatment. It is found that the tensile strength and modulus of 3D printing CF/PA12 composite with microwave treatment are improved by 23.8% and 10.2% compared with the original specimen, respectively. Moreover, a new mechanism of mechanical reinforcement is investigated and proposed by nanoindentation and 3D X‐ray computed tomography. The work does not only confirm formation of 3D printing CF/PA12 composite with good mechanical properties, but also proposes a new mechanism of microwave treatment effect on 3D printing polymer composite based on carbon fiber.Highlights
A new 3D printing CF/PA12 composite based on microwave treatment is developed.
The 3D printing composite exhibits good mechanical properties.
A new mechanism of mechanical reinforcement is proposed.
The relationship between nomophobia and latent classes of personality
Authors: Ji Shunxin , Xu Suwei , Zhou Zhao , Zhu Ye , Liu Tour 
Published: May 2024

AbstractThe phenomenon of nomophobia, defined as the anxiety experienced when a person is without their mobile phone or is unable to use it, has been identified as having serious negative effects on individuals, particularly students. Previous research has explored the relationship between personality traits and nomophobia, but the findings have been inconclusive. The main objective of this study was to classify personality types through latent class analysis and explore the relationship between these personality types and nomophobia. The Chinese version of the Nomophobia Scale and the Chinese brief version of the Big Five Personality Inventory were used in this study to survey 1906 Chinese college students. The results indicated that (1) a four‐class model provided the best fit and categorized the personality traits as the overcontrolled class, resilient class, moderate class, and vulnerable class; (2) significant differences were observed between the four personality types and nomophobia, with overcontrolled and resilient personality types consistently scoring significantly lower than moderate and vulnerable personality types. Our finding highlights the key feature of the study.
The release of ‘LCP 85‐384’ and its contribution to the Louisiana sugar industry
Authors: Blanchard Brayden A. , Taylor Zachary A. , Rivette Mimi G. , Kimbeng Collins A. , Gravois Kenneth A. 
Published: May 2024

AbstractBasic breeding efforts initiated at the USDA‐ARS in Houma, LA, in the late 1950s allowed Louisiana sugarcane breeders, once again, to cross with the wild germplasm of cultivated sugarcane, Sacharum spontaneum. ‘LCP 85‐384’ was the first success story from this effort and was quickly adopted by growers. It became clear that the cultivar would prove to be substantially impactful to the Louisiana sugar industry. Performing at unprecedented yields in ratoon crops, LCP 85‐384 changed how Louisiana growers would manage their crops. The variety proved to possess traits that fared well in the subtropical production zones of the state. Substantial stalk populations seemed to play a vital role in the necessary ratoon ability and consequent cold tolerance necessary for production in Louisiana. After significant disease pressure, the variety quickly declined in production acreage, but not in impact. It continued to provide sustained progress as a parent for years, contributing to most modern commercial cultivars in Louisiana. Today, LCP 85‐384 and its progeny are used in breeding and genetic research to usher in the next era of progress in the Louisiana sugar industry. Meanwhile, through cooperative efforts of breeding programs around the world, it is making its mark on the sugarcane industries of Argentina in much the same way as it did in Louisiana. In the future, it is expected that the progress made in the breeding program will continue by building upon the gains achieved from LCP 85‐384 and its progeny for the sustained success of the Louisiana sugarcane industry.
Statistical analysis to examine the influence of thermal aging on hybrid glass epoxy polymer composites with fillers of multi‐walled carbon nanotubes
Authors: Sravanthi K. , Mahesh V. , Nageswara Rao B. , Jani S. P. 
Published: May 2024

AbstractE‐glass fibers are widely preferred due to ease of processing and its low cost, which has substantial scope in the fields of electronics and electrical insulation applications. Because of its low strength and corrosion resistance, use of E‐glass fibers is limited in aerospace and automotive applications. There is a need for enhancing the properties of the composite to overcome such limitations. Therefore, an attempt is made to introduce multi‐walled carbon nanotubes (MWCNT) as fillers into E‐glass fibers to meet the industry needs. In the current study, woven glass fiber of 5 layers and multi‐walled nano carbon fillers of 2, 4 and 6 by wt%, LY556 epoxy resin, and HY951 hardener were used to prepare 4 different type of composites along with the neat epoxy glass fiber reinforced polymer composites (GFRP). The hand‐layup route was used in the composite preparation due to its low cost, technological feasibility, and simple process setup. The developed samples were characterized for mechanical properties via tensile, flexural and impact tests. Tribological characteristics were performed by air jet erosion test. Chauvenet's criterion is applied for identifying the outliers (if any) from the data of repeated test properties. Taguchi's (orthogonal array) is selected for obtaining optimal hybrid composite, which yield better mechanical properties. Empirical relations are developed for the material properties in terms of process variables. The sample (4 wt% MWCNT) exhibited enhancement of 17.27% in tensile strength, 6% of impact strength and 7.3% of flexural strength when compared with neat epoxy GFRP. This hybrid composite is considered for thermal aging and observed at 60°C, 8% increase in tensile, 7% increase of impact and 15% in flexural strength due to the precipitation on carbon nano tubes along the gain boundaries. The present study recommends 4% MWCNT fillers in developing hybrid glass epoxy polymer composites for use in aerospace, automotive and civil construction industries due to economic and technological feasibility.Highlights
Utilize low‐cost E‐glass fibers in electronics and electrical insulation applications.
Improve composite properties for aerospace and automotive industries.
Develop hybrid glass epoxy composites with 2 to 6 wt% MWCNT fillers.
Examine wear characteristics under air jet erosion and study the impact of thermal aging on mechanical properties.
Apply Chauvenet's criterion for outlier identification in measured properties datasets.
Ring opening functionalization of thiolactone homopolymers for ROS scavenging
Authors: Priester Aaron , Kievit Forrest , Convertine Anthony J. 
Published: May 2024

AbstractIn this research, we explored the synthesis and application of thiolactone acrylamide (TLA) polymers for neutralizing reactive oxygen species (ROS), produced as a result of traumatic brain injury (TBI). We synthesized well‐defined TLA polymers using RAFT (reversible addition‐fragmentation chain transfer) polymerization across a range of monomer‐to‐chain transfer agent ([M]0/[CTA]0) ratios to achieve a range of molar masses. Polymerizations were carried out using a trithiocarbonate CTA (chain transfer agent) with AIBN (azobisisobutyronitrile) as the initiator in N'N‐dimethylacetamide (DMAc) at 60 °C. Kinetic studies indicated a linear increase in molar mass with conversion, pseudo‐first‐order kinetics, and molar mass values that are consistent with theoretical predictions. Furthermore, the polymerizations exhibited a decrease in molar mass dispersity with conversion. We then investigated ring opening of the thiolactone residues with isoserinol (ISOH), which was followed by thiol‐ene reactions of the resultant thiol groups with methacrylamide to yield a series of copolymers with different thiol‐to‐thioether ratios. The resulting polymers demonstrated varying levels of ROS neutralization. Higher thiol concentrations lead to more rapid neutralization while thioether residues provided sustained neutralization activity.
Self‐strengthened hydrogel actuator based on the distribution of size‐differentiated PVA crystallites
Authors: Wang Xiaohui , Hou Yarui , Fan Yiyuan , Liu Zeqi , Li Ran , Li Xiaojun , Yang Bin , Liu Qingye 
Published: May 2024

AbstractSoft tissues, such as muscle could autonomously grow through re‐alignment and/or ‐combination of collagen nanofibrils upon the mechanical training. This adaptive capability is highly expected in artificial materials, particularly in hydrogel actuator. In order to avoid the failure for devices by suffering from the accumulated mechanical loading, in this work, a double layered thermo‐responsive hydrogel actuator capable of self‐strengthening was successfully prepared. In the bilayer, PVA nanocrystals with different particle sizes were uniformly distributed in each monolayer matrix, giving rise to the asymmetric structure and the resultant differentiated de‐swelling behaviors. Thus, the obtained hydrogel actuator with the semi‐interpenetrating network of P(NIPAM‐co‐NMA) can display diverse programmable transformations by varying the temperatures. The existence of PVA nanocrystals in both layers not only can enhance the mechanical strength, dramatically minimizing the collapse of hydrogel actuator in service due to the imbalance of the mechanical properties for bilayer structure, but also was greatly involved in the self‐reinforcing behavior. After repetitive tensile training with 80% strain, the tensile strength and fracture strain increased from 29.6 to 45.8 kPa and 95% to 104%, respectively. The experimental results indicated that the anisotropic orientation and strain‐induced‐crystallization for PVA crystalline domains readily occurred along the tensile direction, finally leading to the synchronous enhancement in mechanical strength for both layers. This work provides a new strategy for designing smart and robust biomimetic hydrogel systems that can be further used as the intelligent soft robotics in various fields.
Addressing cervical cancer prevention in Bhutan: A study on the use of loop electrosurgical excision procedures at the primary health care level
Authors: Tshering Sangay , Dorji Namkha , Letho Zimba , Chhetri Nishal 
Published: May 2024

AbstractBackgroundCervical cancer is the top and fourth leading cause of death among women in Bhutan and worldwide, respectively. The cervical cancer elimination flagship program initiated by the Ministry of Health aims to achieve the 90–70–90 goals by 2030. To achieve this, detection and treatment of pre‐cancerous lesions of the cervix through colposcopy and loop electrosurgical excision procedure (LEEP) are being carried out through the outreach health camps.MethodsThis descriptive study aimed to assess the safety and tolerability of LEEP under local anesthesia and assess the margin status of high‐grade lesion (HGL). We analyzed 193 records of clients who underwent LEEP at Wangdue Phodrang Hospital from 26 September to 5 October 2022. The sociodemographic profile, intraoperative pain, complications, and histopathological reports were described using structured pro forma.ResultsThe mean age of clients was 40.9 ± 8.5 years (range 25–66 years). There were 3.1% who had intraoperative and 2.6% who had postoperative bleeding. There were 18.6% who had foul‐smelling vaginal discharge, and 8.3% had moderate‐to‐severe intraoperative pain. Histopathological assessment revealed 29.5% with chronic cervicitis, 34.2% with HGL, and 1.6% with microinvasive cervical carcinoma. The margin positivity for HGL was 36.4%.ConclusionGiven the safety profile of LEEP under local anesthesia in our setting, the scope of providing a complete cervical cancer screening and treatment package at the primary health care level looks promising. Based on the higher rate of overtreatment and margin positivity, we recommend the practical implementation of standard colposcopy guidelines.
Mapping the Influence of Solvent Composition over the Characteristics of Polylactic Acid Nanofibers Fabricated by Electrospinning
Authors: Karabulut Hatice , Unal Semra , Ulag Songul , Ficai Anton , Ficai Denisa , Gunduz Oguzhan 
Published: May 2024

AbstractThis study investigated the solubility of poly(lactic acid) (PLA) in various solvents (to achieve an 8 % (w/v) polymer solution) and its impact on the morphology of electrospun PLA nanofibers. Several solvents, such as dichloromethane (DCM), chloroform (CHL), tetrahydrofuran (THF), acetone (AC), acetonitrile (ACTNR), dimethylformamide (DMF), dimethylacetamide (DMAc), ethylene glycol (ETGLY), distilled water (WATER), methanol (MEOH), formic acid (FA), and n‐hexane (NHX) were used in their pure and binary forms at several ratios (4 : 1, 2 : 1, 1 : 1, 1 : 2, 1 : 3, and 1 : 4). The study aims to explore the correlation between PLA solubility and its electrospinnability using solvents mapped from the Teas graph across different parameter zones and chemical groups. Hansen solubility parameters, including dispersion cohesion fractional solubility parameter (fd), the polar cohesion fractional solubility parameter (fp) was employed to identify the most effective solvents for PLA dissolution. Teas graph analysis highlighted a correlation between PLA solubility and solvent proximity to Hansen solubility parameters. Additionally, the solubility time varied between 1 hour and 24 hours. Polar solvents such as DCM, CHL, THF, ACTNR, and FA were able to dissolve 8 % (w/v) of PLA at different times, but only very high and effective dissolution of PLA was achieved in pure DCM and CHL whereas FA dissolved PLA in 24 hours, which resulted in the slowest solubility rate. Several structures of nanofibers, such as smooth, heterogenous, porous, fibrous, and beaded, were observed and discussed accordingly in terms of solvent type and ratio. The average nanofiber diameter ranged between 0.18 μm and 3.81 μm. Moreover, physical tests, including surface tension, density, viscosity, and conductivity, were conducted on solvent systems and CHL displayed higher viscosity, while ACTNR had the lowest viscosity and highest conductivity among pure solvents. According to the results of our study, it is possible to design further studies with the aim of deciding which solvents or binary forms should be applied to dissolve PLA within a certain time. The desired structure can be easily arranged to be used as a filter, biomimicking tissue environment, drug delivery system, or extra.
Co3O4/RGO Nanoparticles Fabricated by Facile Solvothermal Method as an Anode Material for High‐Performance Lithium‐Ion Batteries
Authors: Zhu Jiping , Zeng Fuhao , Ma Zeping , Tang Weihao 
Published: May 2024

AbstractA potential anode material for lithium‐ion batteries (LIBs), Co3O4 has been widely considered by many scholars because of its excellent properties in terms of electrochemical characteristics and theoretical specific capacity. However, according to the existing research results, we found that the improvement of the electrochemical performance of Co3O4 has encountered a bottleneck because its intrinsic conductivity is not high enough, and more importantly, the volume expansion is too significant during the charge and discharge process, which leads to the material structure breaking. Therefore, this paper proposes a simple and scalable solvothermal and subsequent calcination method to prepare Co3O4 and reduced graphene oxide (RGO) composite nanoparticles with superior microstructures, and their morphological and electrochemical properties were investigated at different calcination temperatures. As a high‐performance anode material for lithium‐ion batteries, the Co3O4/RGO nanoparticles obtained at 550 °C exhibited terrific initial discharge capacity of 1714.2 mAh g−1, the reversible specific capacity of 1191.9 mAh g−1 with quality coulombic efficiency 98.17 % at 0.5 A g−1 after 100 cycles and extraordinary rate performance (907.6 mAh g−1 with a coulombic efficiency of 99.2 % at 2 A g−1). The facile synthesis method and excellent findings have led to better application prospects for Co3O4/RGO nanoparticles.