39results about How to "Good antibacterial performance" patented technology

The invention discloses a chitosan hydrogel for an antibacterial dressing and a preparation method thereof. The chitosan hydrogel for the antibacterial dressing comprises, by weight, 2 to 6 parts of chitosan, 5 to 20 parts of a water-soluble monomer, 1 to 5 parts of an antibacterial agent polyhexamethyleneguanidine hydrochloride, 0.015 to 0.1 part of a cross-linking agent, 1 to 5 parts of a condensing agent, 1 to 5 parts of an activator, 0.1 to 0.5 part of an initiator and 109 to 145 parts of dimethyl sulfoxide. The preparation method comprises the following steps: introducing a carboxyl group on chitosan in the manner of free radical polymerization; subjecting the carboxyl group introduced on chitosan and the antibacterial agent polyhexamethyleneguanidine hydrochloride to an amidation reaction by using the condensing agent and the activator; and uniformly mixing chitosan for the antibacterial dressing with the cross-linking agent and pouring an obtained mixture into a die for a reaction so as to obtain the hydrogel with good drug resistance, good antibacterial property, a lasting antibacterial effect, high water absorption and good mechanical properties.

The invention relates to a bacterial cellulose composite dressing, which is prepared by soaking a composite material composed of bacterial cellulose and non-woven fabrics or woven fabrics in an antibiotics-containing water solution. The bacterial cellulose composite dressing is prepared by following steps: choosing bacterial strains capable of secreting bacterial cellulose to made into a seed mash, then evenly dropwise adding the seed mash on non-woven fabrics or woven fabrics, which have been subjected to a sterilization treatment, adding a small amount of fermentation culture medium for cultivation of 12 to 48 hours, then adding fermentation culture medium, cultivating for 3 to 6d, taking out the fermentation products, and finally subjecting the fermentation products to a purifying treatment so as to obtain the bacterial cellulose composite non-woven fabrics or woven fabrics. The preparation method has the advantages of simple technology, and convenient operation, and is capable of preparing bacterial cellulose wound dressings with various functions according to the needs.

The invention discloses a manufacturing method of a silk-bamboo-cotton towel, comprising cotton blending, spinning, bleaching and dyeing, post-treatment, and sewing and classification. The method is characterized in that: 1) cotton blending: wherein, spun silk accounts for 22 percent of the total weight of blending cotton, bamboo fibre accounts for 36 percent, cotton fiber accounts for 42 percent; 2) spinning: after spinning, the cotton fiber is distributed in the outer layer, the spun silk is distributed in the middle, and the bamboo fibre is distributed in the inmost layer; 3) bleaching anddyeing technology processing; 4) post-treatment: a hydrophilic softener is adopted for post-treatment. The invention solves the problems of bleaching, dyeing and post-treatment technologies of blending products, in particular to that of the blending products of protein fiber and cellulose fiber, and solves the contradict that a technique being suitable for processing cotton can damage silk fiber and a technique being suitable for processing silk can not ensure the water absorption of cotton.

The invention discloses a preparation method of a bacterial cellulose composite chitosan moist antimicrobial dressing, and relates to medical equipment and the technical field of a preparation of the medical equipment. The preparation method comprises the following steps that a seed mash prepared from activating a strain is dropped on a non-woven fabric or a woven fabric, and a small amount of fermentation culture media are added to be cultured for 12 to 48 hours, then the fermentation culture media are supplemented, and culturing is carried out for 3 to 6 days, and a fermentation product is taken out, the fermentation product is purified to obtain a bacterial cellulose composite non-woven fabric or a woven fabric membrane material, and an electrostatic spinning method is used for ejecting a chitosan solution from a spinneret, trickles of the ejected chitosan solution are ejected to the bacterial cellulose composite non-woven fabric or the woven fabric membrane material containing anhydrous ethanol and / or water, finally the bacterial cellulose composite chitosan moist antimicrobial dressing is obtained after the bacterial cellulose composite non-woven fabric or the woven fabric membrane material containing anhydrous ethanol and / or water is treated. The preparation method disclosed by the invention is simple and easy in preparation processes, convenient to operate, and low in cost, and the prepared moist antimicrobial dressing can cure chronic unhealed traumas, pressure acute refractory wounds, burns, and a large area of soft tissue defects and / or infections.