14 results about "Polyhexanide" patented technology

The invention discloses a full-biodegradable bag and a preparation method thereof in the technical field of biodegradable materials.According to the full-biodegradable bag, polylactic acid and poly (butylene adipate-co-terephthalate) serve as matrixes, and performance optimization is achieved by adding a specially-made nanofiber interpenetrating network compatibilizer and a star-shaped structure bio-based plasticizer; wherein the nanofiber interpenetrating network compatibilizer is prepared by grafting polylactic acid and poly (butylene adipate-co-terephthalate) chain segments on cellulose nanofibers through an atom transfer radical polymerization technology, and the star-shaped structure bio-based plasticizer is prepared through ring opening polymerization and melt grafting technologies. In addition, the formula also comprises a maleimide modified lignin filler, an ethylene bis stearamide lubricant and an antioxidant. Through the synergistic effect of the two specially-made modified compounds, the compatibility of all the components is remarkably improved, the preparation process is simple and reliable and suitable for industrial production, and the problem of white pollution of traditional plastic products can be effectively solved.

The application discloses an antibacterial film material in the field of film materials and a preparation method thereof, and comprises the following components in parts by weight: polylactic acid-based polymer 80-90 parts, polybutylene adipate terephthalate (PBAT) 10-20 parts, antibacterial toughening agent 3-5 parts, initiator 0.05-0.1 part and antioxidant 0.2-0.3 part. Through polymer design and crosslinking, the material improves the toughness and tensile capacity, is suitable for film application, the addition of PBAT further enhances the flexibility, the compactness of the polylactic acid-based polymer increases the barrier capacity to gas and liquid, the introduction of the antibacterial toughening agent enables the film to have antibacterial effect, prolongs the service life of the material and has important value in food hygiene application.

The application discloses a polylactic acid composition, a preparation method and application thereof. The polylactic acid composition provided by the application can take into account notch toughness and extrusion stability by limiting the weight fractions of components, and limiting the ratio of melting enthalpy and glass transition temperature, the SiO2 content of talcum powder, the T content of polybutylene terephthalate adipate and the D content of polylactic acid in specific ranges.

Composition for use for the treatment and / or prevention of infections or lesions of the (oral) mucosa, in particular originating from at least one selected the group consisting of: perleche; scarlet fever; pharyngitis; acute necrotising ulcerative mucositis; impetigo contagiosa; chelitis glandularis apostem atosa; gingivostomatitis herpetica; herpes simplex; herpes stabistis recidivans; herpes zoster; hand-foot-mouth; human papilloma virus; HIV; oral candidiasis; oral lichen planus; lichen ruber planus; leukoplakia, erythroplakia; methicillin-resistant staphylococcus aureus; gingivitis / periodontitis; mucositis / peri- implantitis; alveolar osteolytis; wherein the composition comprises or consists of the following components: (a) polyhexanide (PHMB); (b) an organic or inorganic buffer different from a); (c) further additives; (d) optionally water.

The invention discloses hydrogel capable of releasing growth factors after heat absorption and contraction and a preparation method of the hydrogel, and belongs to the field of biomedical materials. The hydrogel is of a three-layer composite structure, wherein the first layer is a sodium alginate-chitosan polyelectrolyte semi-interpenetrating network layer and serves as a compact protective layer; the second layer is a bacterial cellulose-sodium alginate high-toughness layer and is used as a bearing layer and a shrinkage driving layer; and the third layer is a basic fibroblast growth factor (bFGF)-loaded poly (butylene adipate / terephthalate) (PBAT) electrostatic spinning film layer and is used as a medicine storage cavern. According to the invention, the characteristic that the bacterial cellulose / sodium alginate layer can generate reversible heat absorption volume shrinkage at a specific temperature is used as a physical driving force to extrude and promote the bFGF in the third layer of PBAT fiber membrane to directionally release outwards.

This invention relates to a biodegradable anti-stick film and its preparation method. The biodegradable anti-stick film comprises a top layer, a middle layer, and a bottom layer arranged sequentially. The top layer comprises polyadipate, polylactic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. The middle layer comprises polyadipate, polyglycolic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. The bottom layer comprises polyadipate, polylactic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. Its advantages lie in the following: adding a compatibilizer to each layer improves the compatibility of the raw materials, thereby reducing the brittleness of the biodegradable anti-stick film; adding PBAT-carrier dual-antibiotic masterbatch to each layer controls the degradation rate of the biodegradable anti-stick film; adjusting the blending ratio of each layer component improves the mechanical properties, processing flowability, and biodegradability of the biodegradable anti-stick film; and coating the top layer with a UV-curable release coating ensures the application requirements of the biodegradable anti-stick film.

Compostable seaweed-based compositions, and associated systems and methods are disclosed herein. In some embodiments, the seaweed-based composition comprises (i) a phycocolloid including agar, alginate, carrageenan, and / or unprocessed seaweed, (ii) a polymer comprising thermoplastic starch (TPS), polycaprolactone (PCL), polylactic acid (PLA), polyhydroxyalkanoates (PHA), polyesteramide (PEA), polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), and / or polyvinyl alcohol (PVOH), and (iii) an additive, wherein the phycocolloid comprises no more than 90 wt % of the seaweed-based composition, the biopolymer comprises no more than 80 wt % of the seaweed-based composition, and the additive comprises no more than 50 wt % of the seaweed-based composition.

The application discloses a biodegradable apple packaging plastic bag and a preparation method thereof, and relates to the technical field of plastic bag preparation.The plastic bag comprises the following component raw materials: polyethylene grafted maleic anhydride, a toughening agent, modified corn starch, modified biochar, an anti-fog agent, epsilon-polylysine and a composite additive.In the application, the modified corn starch is a modified material with the functions of degradation acceleration, antibacterial enhancement and mechanical reinforcement, and can form a carbon source available for microorganisms in the film after being added, so that the degradation process of the polyethylene grafted maleic anhydride, polyhexanedioic acid and terephthalic acid butylene butylene matrix is promoted, and the degradation period in the natural environment is shortened.The chitosan oligosaccharide component can play a high-efficiency antibacterial role and cooperatively improve the antibacterial and fresh-keeping effect of the packaging together with other antibacterial components.The nano-cellulose can construct a molecular support network and make up for the problem of the decrease of the mechanical properties of the film possibly caused by the addition of the starch.

This invention relates to the field of biodegradable material preparation technology, specifically disclosing a biodegradable polylactic acid (PLA) composite material with antibacterial properties and its application in the preparation of packaging materials. The biodegradable PLA composite material with antibacterial properties comprises the following raw material components in parts by weight: 50-80 parts of polylactic acid resin; 40-60 parts of poly(butylene adipate / terephthalate); 20-30 parts of filler; and 1-3 parts of dispersant; wherein the filler comprises nano-silver oxide and mica powder. This invention, by adding a filler composed of nano-silver oxide and mica powder to the biodegradable PLA composite material, enables the composite material to possess good antibacterial properties; simultaneously, it also enhances the impact resistance of the biodegradable PLA composite material.

The present application relates to the technical field of polymer preparation, in particular to an antibacterial polymer nanocomposite material and a preparation method thereof.The material takes polyhydroxybutyrate and polybutylene adipate terephthalate as a matrix, fuses a non-metallic organic framework antibacterial agent, a non-peptide antibacterial mimic and a photothermal response nanomaterial, wherein the non-metallic organic framework antibacterial agent and the non-peptide mimic synergistically play a chemical sterilization role, and the photothermal response nanomaterial improves the sterilization efficiency through physical thermal effect, so that the material provided by the present application can realize broad-spectrum, efficient and persistent antibacterial effect through the organic combination of multiple antibacterial mechanisms.The material provides a high-efficiency antibacterial solution of multiple mechanism synergy in view of the defects of single antibacterial mechanism and non-persistent effect of traditional materials, and is suitable for medical and packaging fields, and has significant economic value and application prospect.

The invention relates to the technical field of high polymer materials, and discloses an anti-ultraviolet degradation film for seed corn and a preparation method thereof.The preparation method comprises the following steps that poly (butylene adipate-co-terephthalate), polylactic acid, barrier master batches, modified benzophenone, an ultraviolet light absorber, an antioxidant 1010 and stearic acid are put into a high-speed mixer to be mixed for 20-40 min at the speed of 2000-3000 rpm, and a mixture is obtained; the preparation method comprises the following steps: mixing the raw materials to obtain a primary mixed material, adding the obtained primary mixed material into a double-screw extruder, extruding and granulating at 140-160 DEG C, then putting the obtained master batch into a film blowing machine, and carrying out film blowing molding at 160-190 DEG C to obtain the ultraviolet-proof degradable film for the corn for seed production. The degradable film disclosed by the invention has good anti-ultraviolet performance and antibacterial performance.

Provided is a multilayered biodegradable sheet having at least three layers, such as three layers or five layers, wherein a first outer polymer layer comprises polybutylene succinate (PBSA) and polylactic acid (PLA); a second outer polymer layer comprises polycaprolactone (PCL) and PLA; and a core layer comprises polybutylene adipate terephthalate (PBAT).

This invention relates to the field of polymer composite materials technology, specifically to an environmentally friendly biodegradable antibacterial film and its preparation method, comprising the following raw materials in parts by weight: 40-60 parts polylactic acid, 20-40 parts polyadipic acid, 5-15 parts additive A, 3-10 parts additive B, 2-8 parts polyethylene glycol, and 1-5 parts polyethylene wax. In this invention, additive A is a composite of loofah charcoal loaded with tea polyphenols and quaternary ammonium salt-modified chitosan, combined with eugenol to construct a synergistic antibacterial system. The porous structure of the loofah charcoal adsorbs pathogens and directionally releases tea polyphenols and eugenol, thus enhancing the antibacterial efficacy of the film through a dual effect. Additive B is a composite powder prepared by modifying cassava starch with active ingredients from Sichuan pepper seeds extracted by supercritical CO2. The composite powder improves the toughness and thermal stability of the film and enhances the processing fluidity of polyadipic acid. The two work synergistically to endow the film with excellent film-forming properties, mechanical strength, and durable antibacterial properties.