Query: Bacteriostasis of chitosan composite

title: The size controllable preparation of chitosan/silver nanoparticle composite microsphere and its antimicrobial performance.
abstract: The control of chitosan/silver nanoparticle composite microsphere (CAgMs) size is crucial for tuning its function. In the current work, monodisperse organically modified CAgMs with controllable size were synthesized using a two step method. The fine tuning of the microsphere size was confirmed by many reaction parameters while the cross linking agent was the key research object. Through physical and thermodynamic analysis, we found the cross linking agent induced smaller size, higher silver concentration, more heightened glass transition temperature and stronger hydrogen bond network. The as prepared microspheres exhibited strong bacteriostasis and fresh keeping function depending on cross linking agent concentration. The phenomenon is believed to be derived from the difference in microorganism adsorption and killing ability from induced varying specific surface area and encapsulated silver content. Our current work highlights the size controllable preparation of CAgMs, and based on our findings, small size CAgMs can be a promising candidate in the field of antibacterial and fruit preservation applications.

title: Synthesis and Anti/Bacteriostasis of Nano Silver Composites Based Modified Chitosan
abstract: To prepare chitosan N vinylpyrrolidone graft copolymer (CTS g PVP) and its composites material loaded Nano silver particles by using CTS g PVP as Template. Through the experiments about anti/bacteriostasis and biocompatibility, the composites materials were evaluated the possibility of being used as a cosmetic anticorrosion agent.  Nano Ag@CTS g PVP was synthesized using in situ method, and explored the antibacterial effect of it's by K B Method. The biosafety was also evaluated by the chick embryo allantoic membrane test.  Nano Ag@CTS g PVP was synthesized in 0.75% aqueous solution of CTS g PVP. The size of torispherical nano silver particles are about 20 nm to 30 nm. The particles dispersed evenly in composites material with the amount of nano silver in 1.51%wt. The composite material shows good biocompatibility and anti/bacteriostasis by using either alone or in the compound.  With good anti/bacteriostasis effect and low irritation, Nano Ag@CTS g PVP would have been used in the field of cosmetics.

title: Chitosan orange peel essential oil composite plastic wrap with bacteriostasis?functions
abstract: The invention discloses a chitosan orange peel essential oil antibacterial wrap, and a preparation method thereof, wherein the antibacterial wrap contains chitosan and orange peel essential oil. The chitosan orange peel essential oil antibacterial wrap plays the fresh keeping effect, improves the bacteriostasis action, and is rich in orange flavor, so that the wrap can be used as the wrap capable of removing peculiar smell in a storage container. The preparation method is simple and synergistic?bacteriostasis effect can be achieved.

title: Preparation process of modified chitosan composite gel moisture retention adhesive bandage
abstract: The present invention relates to a preparation process of a modified chitosan composite gel moisture retention adhesive bandage, which comprises a nonwoven layer, a moisture retention layer and a protective layer from bottom to top, wherein the moisture retention layer consists of a modified chitosan gel. The preparation process designs the preparation method of the adhesive bandage. The adhesive bandage has the characteristics of bacteriostasis, inflammation relief, bleeding and pain stopping, and no wound adhesion, and provides a moist environment to accelerate wound healing, and mitigates the physic and spirit pain of the patients.

title: Chitosan composite mask
abstract: The utility model discloses a chitosan composite mask. The chitosan composite mask comprises a cover body and a tying belt. The cover body is composed of an outer surface layer, an inner surface layer and a middle layer. The middle layer comprises an activated carbon layer and a chitosan layer. Due to the fact that activated carbon has very good absorbing performance, and chitosan has very good absorbing performance and very good antimicrobial performance, in the use process of the mask, the mask can well absorb suspended particles in the air and harmful gas in the air, and meanwhile can play a role in bacteriostasis and sterilization, prevent bacterium from breeding in the mask, and play a role in protection.

title: Evaluation of the Preparation and Biocompatibility of Poly(vinyl Alcohol)(PVA)/Chitosan Composite Electrospun Membranes
abstract: Electrospinning has been used in a wide variety of applications, such as tissue engineering, filtration and biomaterial scaffolds for vascular grafts or wound dressings. Recently, wound dressings have become more important in human life. They must have the superior biocompatibility, water absorption, water vapor permeation and antibacterial ability. Chitosan has been employed in clinical applications and exhibits excellent biocompatibility, biodegradation and bacteriostasis. In this investigation OR study, experiments were performed on a series of poly (vinyl alcohol) (PVA)/Chitosan (CS) fiber membranes at various blend ratios and electric fields to evaluate their spinnability. The morphology, diameter and structure of electrospun nanofibers were examined by scanning electron microscopy (SEM) When PVA/Chitosan=80:20 and electric field=0.67 kV/cm, the spinnability of electrospun membrane was good. IR spectra demonstrated strong intermolecular hydrogen bonds between the molecules of Chitosan and PVA. Furthermore, cell cultures demonstrate that both PAV and chitosan have good biocompatibility and are non toxic.

title: Long effective bacteriostatic polyamide fiber composite material and preparation method thereof
abstract: The invention discloses a long effective bacteriostatic polyamide fiber composite material and a preparation method thereof. The long effective bacteriostatic polyamide fiber composite material comprises the following components in parts by weight: 40 60 parts of a polyamide fiber, 2 6 parts of potassium sorbate, 2 6 parts of benzoic acid, 1 10 parts of hydroxyethyl dodecyl alcohol, 1 4 parts of pentaerythritol, 3 11 parts of chitosan, 1 3 parts of thymol crystals, 1 3 parts of lauryl sodium sulfate, 1 5 parts of polyethylene wax, 3 10 parts of titanium dioxide, 3 8 parts of stearate, 2 8 parts of dibutyltin dilaurate and 1 3 parts of a fire retardant. The bacteriostatic effect of the composite material is obvious; the antibacterial activity on escherichia coli and staphylococcus aureus can reach over 95% the bacteriostatic time is long; the antibacterial activity is not weakened by further treatment on the composite material; and the validity of bacteriostasis can reach over a year.

title: Water based natural biological composite antibacterial coating and preparation method thereof
abstract: The invention relates to a building interior wall decorative coating, in particular to a water based natural biological composite antibacterial coating and a preparation method thereof. The water based natural biological composite antibacterial coating comprises the following materials in percentage by weight: 0.8 1.2% of natural chitosan inorganic metal ion complex, 38.0 42.0% of low VOC (Volatile Organic Compounds) pure taste core shell acrylic elastic emulsion, 0.4 0.6% of dispersing agent, 20.0 23.0% of titanium dioxide, 5.0 8.0% of ground calcium carbonate, 6.0 8.0% of kaolin, 0.8 1.0% of thickener and 18.0 20.0% of water. The water based natural biological composite antibacterial coating provided by the invention has the advantages of simple preparation process and low production cost. After a finished product is used in construction, the water based natural biological composite antibacterial coating provided by the invention has a composite antibacterial efficacy integrated with antibacterial, bacteriostasis, mildew proof and air purification properties and can be widely applied to building interior wall coating; and it is tested that the antibacterial ratio of the water based natural biological composite antibacterial coating provided by the invention is more than 95%

title: Edible water resistant, high temperature resistant composite gel antibiotic film and its preparing method
abstract: The present invention is a kind of edible water resistant and heat resistant composite antibiotic gel film and its preparation process. The composite gel film is prepared with esterification modified glucomannan, chitosan, beta cyclodextrin, xanthan gum, carrageenan, one or more of potassium sorbate, sucrose ester and stearic acid, and water. The preparation process includes compounding filming liquid, heating, centrifugal deairing, filming, stoving, humidity homogenizing to soften, peeling film and product packing. The composite antibiotic gel film has certain release controlling effect, long time bacteriostasis effect, water resistance, heat resistance, high mechanical performance and high flexibility, and may be used in packing hot sterilized food, fruit and vegetable preserving packing, etc.

title: Functional medical shell fabric and preparation method thereof
abstract: The invention relates to a functional medical shell fabric. The functional medical shell fabric consists of an inner layer, an outer layer and a base layer arranged between the inner layer and the outer layer; the inner layer and the outer layer are respectively formed by interweaving warp yarns and weft yarns; the warp yarns of the inner layer are made of a cotton polyester blended fabric material, and the weft yarns of the inner layer are made of dacron/alloy conductive yarn blended yarns; the warps yarns of the outer layer are zinc containing Chitosan fibers, and the weft yarns of the outer layer are Imbue fibers; the base layer is an organic silicon/polyvinyl alcohol/graphene oxide composite film with a porous structure. The functional medical shell fabric disclosed by the invention has the effects of good bacterial resistance and bacteriostasis, anti static electricity and radiation resistance, and is good in moisture absorption and sweat releasing effect, comfortable to wear and simple in preparation technology; the shell fabric obtained through a three layer composite means can guarantee close integration of the inner layer and the outer layer of the shell fabric, and is good in breathability, stable in size and resistant to washing; furthermore, the hand feeling and luster of the shell fabric can be prevented from being influenced by a conventional padding technology.