37results about How to "Good fiber shape" patented technology

The invention discloses a biocompatible nano-conductive fiber and a preparation method thereof. The biocompatible nano-conductive fiber comprises the following three components in part by mass: 100 parts of polylactic acid, 5 to 10 parts of carbon nano tubes and 1 part of sodium dodecyl sulfate. The three components are prepared into spinning solution by utilizing compound solvents, i.e. chloroform and dimethyl sulfoxide, and an electrostatic spinning device is used to spray to prepare the biocompatible nano-conductive fiber, wherein the fiber diameter is between 200 and 500nm; the carbon nano tubes are coated uniformly with the polylactic acid and are orderly arrayed in the fiber; the surfaces of the carbon nano tubes are subjected to hydroxylation; the mass percentage of hydroxy is 3.06 weight percent; the diameter of the carbon nano tubes is between 10 and 20nm; the length of the carbon nano tubes is 30mum; the purity of the carbon nano tubes is over 95 weight percent; and the specific surface area of the carbon nano tubes is over 200m<2>/g. The invention has advanced and simple process and reasonable formula. The prepared nano-conductive fiber has good biocompatibility and has wide application prospect.

The invention provides a chemical warfare agent self-disinfection MOF (metal organic framework) fiber filtering membrane and a preparation method thereof. The preparation method comprises the following steps of performing electrostatic spinning calcining to prepare a zirconium oxide fiber film; mixing with a corresponding organic ligand and an activated acid solution, and performing hydrothermal reaction, so as to obtain the self-disinfection MOF fiber filtering membrane. The prepared self-disinfection MOF fiber filtering membrane has the advantages that the additional support material is notneeded, the self ultra-large specific surface area of MOFs is maintained, and the adsorption capacity and catalytic property are excellent; by adopting the micro-nano multi-stage structure, the reaction matter is favorably transmitted, the catalytic sites are exposed, and the agglomeration of the catalyst is avoided; the excellent self-disinfection property is realized; the degrading conversion rate of a simulating matter of a chemical warfare agent is high, the half-life period is short, and the stability in cyclic use is good; by adopting the thin film form, the self-disinfection MOF fiber filtering membrane can be directly applied into the actual filtering protection device.

The invention relates to polylactic acid-polyethylene glycol coated florfenicol nanofiber and a preparation method thereof, belonging to the technical fields of veterinary drugs and preparation thereof. The polylactic acid-polyethylene glycol is segmented copolymer D, L-polylactic acid-polyethylene glycol-D, L-polylactic acid; and florfenicol is filled in a reticular structure of polylactic acid-polyethylene glycol, and mass ratio of the florfenicol to the polylactic acid-polyethylene glycol is 1: (3.5-10). The preparation method comprises the steps of adding the polylactic acid-polyethylene glycol and the florfenicol into an organic solvent, stirring and dissolving to obtain a spinning solution; and then carrying out electrostatic spinning to obtain a polylactic acid-polyethylene glycol coated florfenicol nanofiber membrane. The preparation method provided by the invention realizes drug loading while carrying out electrostatic spinning on the polylactic acid-polyethylene glycol, and solves the problems such as sudden release of drugs, short action time and poor water solubility; and the adopted raw materials cannot cause the problem of environmental protection after degradation, the cost is low, the preparation process is simple and quick, and the polylactic acid-polyethylene glycol coated florfenicol nanofiber and the preparation method are applicable to mass production.

The invention discloses a preparation method of a functional PU-AOPAN (polyurethane-amidoximepolyacrylonitrile) composite nanofiber membrane, comprising the steps of first, dissolving PU and PAN in an electrostatic spinning polar organic solvent, preparing electrostatic spinning solution with PU and PAN accounting for 8-12% by weight of total weight, and preparing a PU-PAN composite nanofiber membrane by electrostatic spinning process; second, subjecting the PU-PAN composite nanofiber membrane to amidoximation modification to obtain the PU-AOPAN composite nanofiber membrane. The defects are improved that PAN and PU are poor in hydrophilic performance and have few surface functional groups; the PU ingredient is introduced to functional nanofiber, the mechanical properties of amidoximepolyacrylonitrile are greatly improved, and the practical applicability of amidoximepolyacrylonitrile can be greatly enhanced.

The invention relates to a wood and bamboo fiber mercerizing pulp and a preparation method thereof. The fiber mercerizing pulp is prepared through the following steps: swelling, mercerizing, neutralizing, washing, concentrating, drying a wood pulp or bamboo pulp which is utilized as a raw material in a free state of the fiber without a pressing or clamping state, wherein the obtained mercerized fiber is natural in flexibility. The mercerizing pulp obtained in the invention is good in air permeability, good in intensity, large in fiber length, high in yield and low in cost; and the cotton fiber is saved.

The invention discloses a preparation method for a pulp fiber-reinforced fully-degradable starch plastic. According to the invention, a broad-leaved wood or coniferous wood pulp fiberboard for the paper-making industry is mainly used and two-step pretreatment is carried out so as to obtain pulp fiber of a certain scale; the pulp fiber is further mixed with starch and a degradable plasticizer, and then the pulp fiber-reinforced starch plastic is prepared through plasticizing by a double screw extruder. The prepared pulp fiber-reinforced starch plastic has the advantages of obviously improved mechanical properties, complete degradation, low cost, a simple preparation process and the like and can be extensively used for preparation of a variety of fully-degradable starch plastic products.

The invention discloses a preparation method of acrylic board surface lining protective body paper. The preparation method comprises following steps: by weight, 3 to 10 parts of cellulase, 1 to 8 parts of pectase, 3 to 10 parts of xylanase, 0.1 to 0.8 part of an alkylolamide, 0.1 to 0.6 part of Span-60, and 75.7 to 88.8 parts of water are combined to prepare a composite bio-enzyme preparation; byweight, 1 to 5 parts of a mixed pulpboard is introduced into a pulper, 95 to 99 parts of water is added, the composite bio-enzyme preparation is added, and defibering is carried out for 5 to 30min soas to obtain a mixed slurry, wherein the adding amount of the composite bio-enzyme preparation accounts for 100 to 300ppm of the weight amount of absolutely dry paper pulp; the mixed slurry is introduced into a pulping machine for pulp refining, pulping concentration ranges from 1 to 4%, and pulp refining is carried out until beating degree is 20 to 45 DEG SR; obtained paper pulp is subjected to dilution, screen moulding, squeezing, drying, and curling processing so as to obtain a finished product. According to the preparation method, the composite bio-enzyme preparation at an optimal ratio isadded in body paper pulp refining process, so that paper pulp beating degree is increased, pulp refining time is shortened, energy consumption is reduced, pollution is reduced, the ratio of fiber morphological substances in paper pulp is improved, and body paper object amount index is increased obviously.

The invention provides a centrifugal spinning preparation method of polyacrylonitrile-based pre-pre-oxidized fibers and carbon fibers. A prepared polyacrylonitrile-based N,N-dimethylformamide spinningsolution is injected into a plane receiving type centrifugal spinning device and jetted from a spinneret hole to a plane collecting belt under the action of centrifugal force to prepare polyacrylonitrile-based precursor fibers with relatively small diameter and uniform size distribution, then pre-oxidation is conducted through sectional heating and heat preservation, and the prepared polyacrylonitrile-based pre-oxidized fibers are high in heat resistance, good in fiber morphology and free of the adhesion phenomenon; high-temperature carbonization is carried out to obtain the polyacrylonitrile-based carbon fibers with uniform diameter distribution and good heat resistance. According to the method, polyvinyl butyral is added, so that the polyacrylonitrile-based carbon fibers of a porous structure are prepared.

The invention belongs to the technical field of bioengineering, and particularly relates to a preparation method of a nanofiber dermal scaffold. The method includes the following steps: (1) dissolving, by weight, 20-25% of human-derived recombinant collagen and 0-5% of auxiliary materials in a solvent so as to prepare a spinning solution; (2) preparing a nanofiber membrane through electrostatic spinning; (3) cross-linking the nanofiber membrane by using a crosslinking agent; and (4) loading the crosslinked nanofiber membrane on a silica gel membrane so as to obtain the nanofiber dermal scaffold. The prepared scaffold has good fiber morphology and high mechanical strength, needs of medical dressings can be met, and the scaffold can be fitted into damaged tissue parts, and is capable of effectively helping regeneration of dermal tissue, accelerating healing of wounds, maintaining the wound surface moist and reducing risks of scar formation.

The invention provides a preparation method of agar nanofibers. Fibers are prepared through a jet spinning method, the fibers obtained through the jet spinning method are relatively small in diameter, good in fiber appearance and smooth in surface, cavities cannot be generated, and the mechanical property of the fibers can meet application requirements.

The invention relates to a lasting mutually promoting and win-win developing implementation scheme for wood plastic production, resource exploitation and environment protection. The scheme is characterized in that: osier is planted in low-lying areas which are easy to be flooded, and sword iris is planted in saline-alkali lands; osier powder and sword iris fiber are used for replacing wood powder, such that the lasting mutually promotion and win-win development of wood plastic production, low-lying flooded area treatment, saline-alkali land treatment and ecological environment protection can be realized. With the scheme, wood plastic production is changed from a dependant industry into a leading industry; the dependence of wood plastic base material on wood is solved; a problem of insufficient biomass base material is solved; a history that wood products are dependant on deforestation is ended; the performance of wood plastic material is improved; wood plastic composite material with light weight and high toughness is produced; and ecological environment is obviously improved. With the scheme, an integral production system of osier powder, sword iris fiber and wood plastic composite material is established; and problems in each link can be coordinated and solved scientifically and quickly. Therefore, a lasting mutually promotion and win-win development of wood plastic production, resource exploitation and environment protection can be ensured.