274results about "Alginate artificial filaments" patented technology

The invention relates a biodegradable and absorbable natural polymer-based nano-fibrous membrane prepared by a freeze-drying method, and the application thereof. The natural polymer-based nano-fibrous membrane is prepared through the following steps of: dissolving natural polymer powder into a corresponding solvent so as to prepare an extremely-dilute solution with the concentration of 0.001-0.1wt %; after the natural polymer powder is completely dissolved in the solvent, transferring the obtained natural polymer solution into a liquid nitrogen refrigerating device, so that the natural polymer solution is rapidly frozen in a liquid nitrogen environment; then, carrying out freeze-drying treatment on the obtained product in a freeze drier for 12-48 hours to obtain natural polymer-based nano fibers; and carrying out cross-linking on the obtained natural polymer-based nano fibers by a corresponding cross-linking agent to obtain a natural polymer-based nano-fibrous membrane, and then carrying out MTT (methyl thiazolyl tetrazolium) cytotoxicity test and cell vaccination experiments on the natural polymer-based nano-fibrous membrane, with the obtained results showing that the obtained fibrous membrane has no toxicity but has excellent cell adhesion and proliferation properties. The natural polymer-based nano-fibrous membrane disclosed by the invention is simple in the operation process, easy to control and low in cost; and by using the nano-fibrous membrane disclosed by the invention, ultra-fine natural polymer-based nano fibers can be prepared continuously on a large scale.

The invention discloses a method for manufacturing an antimicrobial calcium alginate fibre. A sodium alginate is used as spinning stock solution; in a solidification bath containing an antimicrobial agent, the antimicrobial calcium alginate fibre is obtained by a wet-method spinning process; and the antimicrobial agent is a cationic compound which is combined with large molecules of the calcium alginate fibre through ionic bonds. The antimicrobial calcium alginate fibre obtained by the method has no toxicity and no side effect on human body; the antimicrobial agent and the large molecules of the fibre are combined by the ionic bonds in order that the antimicrobial agent has long-lasting antimicrobial function; in addition, the fibre retains the excellent quality of the calcium alginate fibre, has excellent hygroscopic property and good mechanical property, can be used for manufacturing medical dressings, has the advantages of convenient use, comfortable application and good ventilation, the acceleration of the healing of wound, the relieving of the pains of patients and the like, can be also used for manufacturing clothing and industrial textiles by pure spinning or blended spinning with cotton, mucilage glue, bamboo pulp, fur, ramie, soybean protein fibre and the like.

The invention discloses high strength alginic acid / gelatin blended fiber manufacturing method and use. The method includes the following steps: making sodium alginate solution with 3-6% mass percent; making gelatin aqueous solution with 6-12% mass percent and 8.0-9.0 pH; mixing them as 10-50:100 volumetric ratio; stirring to homogeneous phase system; decompress; de-bubbling; using wet spinning method to make fiber under 33 degree centigrade of which total draft is 10-30%. The invention makes cross blend spinning fluid be cross linking with Ca2+ divalent metal ion, and makes the fiber under acidity with polyelectrolyte effect which can further increase fiber cross linking level, breaking tenacity to improve fiber physical mechanical properties. Thus it can be used to make non-woven fabrics such as hospital gauze, dressing etc.

This invention disclosed a method of produce new material of flame retardant alginate fiber: make sure the proportion of G chain segment and M chain segment which in the molecular structure is 1:1 - 1:3, the potassium alginate's weight percent of solute is 4-7% or the mixture of potassium alginate and sodium alginate be fully predissolved and dissolved and after adjustment viscosity, filter and defoamed by sodium hypochlorite or hydrogen peroxide, produce alginate fiber material by solution spinning at room temperature, the draft proportion of fiber is 120-300%. The limited oxygen index of the fiber reaches to 34, the fiber's tensile strength is more than 3.5cN / tex, the linear density is 2.2-3.5 dtex. The fiber produced by this method is flame retardant, high strength of fracture and bio-degradable, and so on, so which can be used to produce flame retardant textiles by pure spinning or blended. This invention disclosed a method of produce a new material of flame retardant alginate fiber: make sure the proportion of G chain segment and M chain segment which in the molecular structure is 1:1 - 1:3, the potassium alginate's weight percent of solute is 4-7% or the mixture of potassium alginate and sodium alginate be fully predissolved and dissolved and after adjustment viscosity, filter and defoamed by sodium hypochlorite or hydrogen peroxide, produce alginate fiber material by solution spinning at room temperature, the draft proportion of fiber is 120-300%. The limited oxygen index of the fiber reached to 34, the fiber's tensile strength is more than 3.5cN / tex, the linear density is 2.2-3.5 dtex. The fiber produced by this method is flame retardant, high strength of fracture and bio-degradable, and so on, so which can be used to produce flame retardant textiles by pure spinning or blending.

The invention relates to a preparation method and application of chitosan-based nano-fiber, in which the preparation method includes the following steps that the drugs or bio-activator such as growth factors are dissolved or dispersed in the chitisan adipic acid solution with the concentration of 0.01% to 3% (g / ml), and then the gelatin or collagen are added to dissolve. The biodegradable polyanion is dissolved in the de-ionized water and in preaparation to be the solution with the same concentration as that of the chitisan. The mixed chitisan solution is slowly added into the polyanion solution. After stirred uniformly, the nano-fiber loaded with the bio-activator is obtained through centrifuging, washing and cooling-drying. The chitosan-based nano-fiber prepared through the invention is biodegradable and has the imitated extracellular matrix structure, in which the controlled release of bio-activator can be achieved. By the adding of collagen or gelatin, the cellular compatibility of nano-fiber or the control of the release speed of the bio-activator can be improved. Therefore, the invention has a broad prospect in the fields of tissue engineering, clinical wound healing and so on.

The invention relates to a high-strength bio-based fiber technology, and especially relates to a preparation method of an alginate composite fiber used in medical treatment and beauty treatment. The preparation method comprises the following steps: adding water-soluble alginate and a biological cross-linking agent which are mixed according to a certain ratio to water, heating and stirring the obtained water to uniform dissolve the water-soluble alginate and the biological cross-linking agent, and defoaming the obtained solution to obtain a composite spinning solution; and extruding the obtained spinning stock solution into coagulation bath formed by mixing an ethanol solution and a calcium chloride solution, and carrying out wet spinning. The fracture strength of the alginate composite fiber reaches 4-10 cN / detx, and the elongation at break is 14-20%. The biological cross-linking agent adopted in the invention is carboxymethyl chitosan calcium or carboxymethyl chitosan zinc, so the composite fiber has high mechanical strength and good processibility (spinnability and knittability), and keeps the original characteristics of low toxicity, wound healing promotion, good biocompatibility and high safety of alginates.

The invention relates to antibacterial fibre containing nano-metal, fabric and wound dressing, and a preparation method thereof; nano-metal particles are uniformly distributed in the fibre structure and on the fibre surface; a colloid protective agent for preventing nano-metal from condensing does not exist in the fibre; the content of the nano-metal particles is 1.1-20% by weight; the fibre wound dressing as the wound treating dressing has the capability of continuously releasing enough nano-metal particles; and the fibre wound dressing is particularly applied to chronic wound therapy and can provide long-term and effective antibacterial function and effectively prevent various bacteria and microorganisms from infecting wounds.

The invention discloses an oriented conductive hydrogel fiber material and a preparation method thereof. The preparation method comprises the steps: firstly, conductive particle dispersion solutions with different concentrations are obtained through an ultrasonic dispersion method, and dispersed conductive particles are turned into an evenly dispersed state from a mutually agglomerated or wound state so as to meet the subsequent requirements of enhancing the matrix strength and conductivity; then the conductive particles are composited into an organic polymer solution capable of being gelifiedto form a composite electrospinning precursor solution meeting the electrospinning concentration and viscosity; and electrospinning is conducted through a liquid rotary receiving disc, and a polymercomposite conductive particle hydrogel fiber with an oriented micro-nanofiber structure is prepared. Different from the traditional design of hydrogel single physical factor introduction, the orientedmicro-nanofiber structure, sensitive variable conductivity and mechanical strength are simultaneously introduced into a hydrogel system, the hydrogel fiber material with excellent performance is prepared, and a new preparation technique is provided for material preparation of the fields such as biomedical stent materials, flexible electrode materials and biosensors.

The invention discloses a biological activity sea weed glue fiber, which is characterized by the following: incorporating sea weed in the glue fiber; setting the grain size not more than 3 mum; setting the mass percent of the sea weed at 5%-15% related to cellulose; incorporating silver or zinc in the glue fiber; setting the mass percent of the silver or zinc at 0.25%-1.0% relative to the cellulose. This invention also related to a preparing method of the biological activity sea weed glue fiber. This glue fiber possesses good hygienic function for skin, which can be fit for various textile raw material and textile.

The electric spinning and in-situ photopolymerization apparatus and process for preparing nanometer fiber belongs to the field of electric spinning technology. The electric spinning apparatus includes one common electric spinning apparatus and one ultraviolet or visible light generator set between the spinning nozzle and the accepting screen of the common electric spinning apparatus. The electric spinning process includes the following steps: compounding water solution or organic solvent solution of water soluble polymer and adding polyfunctional monomer and photoinitiator to the solution through homogeneous mixing; electrically spinning the solution while irradiating, with the central light strength being 100-400 mw / sq cm; and soaking nanometer fiber non-woven fabric in acetone, and drying to obtain nanometer fiber non-woven fabric. The nanometer fiber non-woven fabric has high mechanical strength and no toxicity, and may be used widely.