2161results about "Conjugated cellulose/protein artificial filaments" patented technology

Electrospinning of materials that are difficult or impossible to process into nanofibers by conventional fiber-forming techniques or by electrospinning are prepared by an electrospinning procedure which uses an electrospinnable outer “shell” fluid around an inner “core” fluid, which may or may not be electrospinnable, to form nanofibers of the inner core fluid having a core/shell morphology. The resulting shell around the nanofiber can remain in place or be removed during post-processing with the core of the fiber remaining intact. The dual-fluid electrospinning process can produce core fibers having diameters less than 100 nm, insulated nanowires, as well as tough, bio-compatible silk fibers. Alternatively, the core can be removed leaving a hollow fiber of the shell fluid.

The invention discloses a method for in situ generating a nano cellulose microfibril reinforced polymer composite material, comprising the following steps: using ionic liquid as a primary solvent, dissolving cellulose, or mixing cellulose with other polymers via solution mixing, and controlling the solubility of the cellulosic material in the solvent to maintain naturally occurring nano cellulose microfibril in the cellulosic material, so as to in situ obtain the nano cellulose microfibril reinforced polymer composite material. The nano microfibril can be observed under a transmission microscope obviously, which is different from the completely dissolved cellulose solution. In the preparing process, the dissolving temperature is controlled within 30-150 DEG C, and stirring and vacuum deaeration are used as auxiliary. By controlling the dissolving time, solution concentration and ratio of mixing, a polymer solution containing cellulose microfibril with dimension of 5-300 nanometers can be obtained. The polymer solution can be used for preparing composite material fiber, hollow fibrous membrane, diaphragm, film, gel, porous material and other known applications of enhanced material.

Cellulosic fibers having enhanced reversible thermal properties and methods of forming such cellulosic fibers are described. In one embodiment, a cellulosic fiber includes a fiber body formed of an elongated member. The elongated member includes a cellulosic material and a temperature regulating material dispersed within the cellulosic material. The temperature regulating material includes a phase change material having a transition temperature in the range of −5° C. to 125° C. The cellulosic fiber can be formed via a solution spinning process and can be used in various products where thermal regulating properties are desired. For example, the cellulosic fiber can be used in textiles, apparel, footwear, medical products, containers and packagings, buildings, appliances, and other products.

The invention relates to a tissue engineering material and a preparation method thereof, in particular to a nano fiber tissue engineering blood vessel and a preparation method thereof. The invention consists of a three-dimensional reticular non-woven film formed by an inner layer of nano fiber and an outer layer of nano fiber; the inner layer of the blood vessel is natural polymer, wherein, calculated by weight, 40 percent to 80 percent is fibroin, 20 percent to 50 percent is gelatine, 0 percent to 20 percent is extracellular matrix protein; while the outer layer of the blood vessel is synthetic polymer. The preparation method is that the natural polymer is dissolved in trifluroroethyl and other solution, while the synthetic polymer is dissolved in hexafluoroisopropanol and other solution, which are respectively prepared into spinning solution; the static electricity spinning technique is adopted to subsequently form the inner and the outer layers on a gather roller; cross-linked treatment is conducted after the inner and the outer layers are taken down, to prepare the nano fiber tissue engineering vessel. The inner layer can simulate the structure of the extracellular matrix, provide good environment for endothelial cells to grow, support adhesion, proliferation and differentiation of the cells, and is good for endothelization of the blood vessel; and the outer layer has good mechanical performance.

The invention discloses a nano-fiber and process for preparation, the components of the nano-fiber are silk fibroin, Argentine simple substance particles and polyvinyl alcohol, the process for preparation is that: a, after natural silk is unglued, dissolved, purified and dried, regenerated silk fibroin is obtained; b, the regenerated silk fibroin is dissolved in acidizing fluid, and regenerated silk acid solution is obtained; c, after polyvinyl alcohol is dissolved, polyvinyl alcohol solution is obtained; d, the two solutions are mixed. e, Ag-type inorganic salt is added; f, silver electrode is used to do electrostatic spinning, and blend nano fiber felt is obtained; g, the blend nano fiber felt is thermally treated for 2-5 minutes at the temperature condition of 100-150 DEG C and is treated by the radiation of ultraviolet light for 3-5 hours, and blend antibacterial nano fiber of the silk fibroin and the polyvinyl alcohol is obtained. The mechanical property of the fiber is better than pure silk fibroin fiber, the biocompatibility is excellent, the fiber has an antibacterial property, the fiber is suitable for bio-medical materials, in particular to tissue engineering scaffold materials.

The invention relates to a preparation method of keratin complex fiber, which comprises the following steps: 1, mixing the dried keratin powder, high polymer for fiber forming, ionic liquid and the like, and mechanically stirring and dissolving to obtain a keratin complex solution at certain temperature; (2) preparing a keratin complex fiber by using a dry jet wet spinning process. According to the invention, the keratin used according to the invention comes from leftovers of processing industry such as chicken feather, drake feather, goose feather and wool, and as for the recycle of the waste, on one hand, the economic benefit is increased, on the other hand, the environment pollution can be reduced. The selected high polymer for fiber forming and keratin can dissolve together in the same ionic liquid, so that the characteristics of high efficiency, simpleness and convenience can be achieved. Compared with the pure keratin fiber, the strength and elongation at break of the spun regenerated keratin can be improved greatly, the practical use value can be increased; the keratin complex fiber has wide potential application in the fields of clothing, wig, tissue engineering and the like. In addition, the solvent ionic liquid can be completely recycled, can not pollute the environment and has the meaning of sustainable development.

The invention provides a double-layered bone repairing membrane material and a preparation method thereof and in particular provides a bone repairing membrane material with antibacterial and inflammation-diminishing and bone promotion functions and belongs to the field of biological materials. The material takes biodegradable aliphatic polyester with biocompatibility and natural polymers as main raw materials and is prepared by adopting an electrostatic spinning method. The material has a double-layered membrane structure and comprises an outer layer added with an antibacterial drug and an inner layer added with a bone promotion substance. The material provided by the invention has excellent biocompatibility and a controllable and long-period medicine releasing performance; meanwhile, an outer-layer membrane of the double-layered membrane structure can be used for inhibiting bacterial infection and inflammation, which are easily caused after bone defects occur, and preventing bacteria from entering defected parts; an inner-layer membrane can be used for promoting the repairing of the bone defects. The material can be used for realizing controllable in-vivo degradation according to requirements and the material does not need to be taken out by a second surgery.

The invention discloses a tissue induction biomedical material, and particularly relates to a degradable active biological membrane/powder. The tissue induction biomedical material is prepared from, by weight, 0.1-99% of degradable medical polyurethane, 0-99.9% of polyhydroxyalkanoate, 0-99.9% of polylactic acid and 1-99.9% of collagen, wherein polyhydroxyalkanoate is one of PHA, PHB, PHBV, PHBHHx and P3HB4HB, polylactic acid is one of polyglycolic acid and polylactic acid-glycolic acid copolymer, and collagen is one or more of collagen I, collagen II, collagen VI, collagen IX, collagen X, collagen XI and other various in-vivo collagen. The ratio of all the components is adjusted according to the requirements of the implanting positions of different in-vivo tissue for material performance, degradation products and PH values, so better clinical service is provided.

The invention discloses a biomimetic preparation method of a high-strength regenerated silk protein fiber. The method takes high crystallization degree, high strength, high modulus nano cellulose whiskers with a large length-diameter ratio to simulate the beta-fold microcrystal in the natural silk fiber, then mixes the nano cellulose whiskers with a regenerated silk fibroin solution, and finally prepares the high-strength regenerated silk protein fiber through a wet spinning method. The characteristic that a large amount of hydroxyl groups in the molecular chains of the rigid nano cellulose whiskers can form intermolecular hydrogen bonds with polar groups such as carboxyl groups, amino groups, and the like, in the molecular chains of silk protein is utilized to achieve the structural bionics of the regenerated silk protein fiber, and thus improves the mechanical properties of the regenerated silk protein fiber. The preparation method is simple, and does not pollute the environment. The mechanical properties of the obtained regenerated silk fiber are equal to or even better than those of natural silk, and the regenerated silk fiber has the similar micro-structure and configuration as the natural silk.

The invention discloses a method for preparing spider silk protein/polylactic acid composite nano-fiber yarn. The method comprises the following steps of preparing a spinning solution, preparing a bath solution and then adopting an improved electrostatic spinning method to guide, heat, wind and shape bunched fibers, so as to obtain the spider silk protein/polylactic acid composite nano-fiber yarn. The composite nano-fiber yarn of the invention can be continuously spun for more than 10 hours and have no broken ends, and a certain amount of spider silk protein effectively reduces the diameter of the fibers and improves the strength of the yarn. In addition, the fracture strength and flexibility of the composite nano-fiber yarn can be further improved through secondary stretching and combined twisting, so that the composite nano-fiber yarn can be applied in biomedical materials and other fields better.

The invention discloses a conductive fiber with a scabbard type structure and a preparation method thereof. The preparation method comprises the following steps: 1) preparing a carbon nano material into a solution 1; 2) preparing the polymer into a solution 2; 3) passing the solution 1 through an inner pipe of a coaxial spinning needle head at a certain speed, at the same time, passing the solution 2 through an outer pipe of the coaxial spinning needle head at a certain speed, extruding the two into a coagulation bath, so as to form a gel fiber with scabbard type structure preliminarily; 4) transferring the gel fiber to a solution containing a reducing agent and conducting chemical reduction at a certain temperature; and 5) cleaning the gel fiber subjected to reduction in the step 4 with a solvent, drying and collecting the gel fiber to a roller, so as to obtain the conductive fiber with scabbard type structure. The invention has the advantages of simpleness, low cost and strong applicability, and is suitable for large-scale industrial production; and the produced fiber with scabbard type structure has excellent electrical and mechanical properties and can be used in the fields of power transmission, antistatic fabrics and engineering materials, etc.

The invention discloses a regenerated animal micropowder protein cellulose fiber and a preparation method thereof. The preparation method comprises the following steps of: adding nanoscale animal micropowder protein into a dispersant solution, stirring the mixture uniformly, filtering to obtain 20 to 35 weight percent of animal micropowder protein liquid; preparing viscose by using cellulose pulp as a raw material, adding denaturant in the dissolution step to obtain modified viscose; adding the animal micropowder protein liquid into the modified viscose in a weight ratio of animal micropowder to the finished fiber of (1-30):100, uniformly stirring to obtain animal micropowder compounding viscose; and defoaming and filtering, spinning molding by introducing a coagulating bath, and then drawing filament and performing aftertreatment to obtain the animal micropowder protein viscose fiber. The fabric made of the regenerated animal micropowder protein cellulose fiber is low in density, and is light; the hygroscopicity, the air permeability and the thermal insulating property of the fabric are further improved; the fiber textile processing and wearability are good; and the production process is pollution-free.

The invention relates to a method for preparing a bionic extracellular matrix silk fibroin/chitosan composite nanometer fibre. The method comprises the steps as follows: (1) cocoons without pupas are cooked in Na2CO3 solution for three times, are cleaned and dried at the temperature of 45 DEG C and are dissolved in ternary solvent to be hydrolyzed, dialyzed and freeze-dried to obtain loose porous solid silk fibroin; (2) the silk fibroin is dissolved in hexafluoroisopropanol to obtain silk fibroin solution; (3) chitosan is dissolved in mixed solvent of HFIP and TFA to obtain chitosan solution; (4) the silk fibroin solution and the chitosan solution are mixed and stirred uniformly to obtain blended electrostatic spinning solution; and (5) the mixed solution is carried out electrostatic spinning to obtain silk fibroin/chitosan composite nanometer fibre. The silk fibroin/chitosan composite nanometer fibre has good mechanical property and degradation behavior and provides best bionic physiological environment for cell growth and tissue regeneration, and the preparation method is simple and easy for implementing and is easy for realizing industrialized production.

The invention provides a wool fibre fabric sweat shirt (pants) with functions of powerful antibiosis, cancer prevention and life prolonging by utilizing nano silver, selenium and germanium, belonging to the technical field of healthy wool textile fibre fabrics clothes production. In the real life of people, various germs, viruses and fungi are contacted unavoidably, in particular, various bird flu and HIV discovered currently seriously threaten the health of human beings. Nano silver can kill 650 types of pathogens; far-infrared rays are almost absorbed by the skin of human body completely to lead the surface temperature of the skin to rise; heat energy impels the blood vessel to expand, improves blood circulation and microcirculation; the electromagnetic wave is colorless, tasteless and formless, can easily cause pollution to human body and is a potential killer. The anions in the air are vitamins and longevity elements in the air and are beneficial to human body; selenium and germanium are important elements to prevent and resist cancer; and the mixture of bee series can comprehensively supplement a plurality of nutrient active components required by human body. After nano treatment, the efficacy of anti-aging traditional Chinese medicine can be improved to 100 times.

A mixed polymer composite fiber including a carboxyalkyl cellulose, a galactomannan polymer or a glucomannan polymer, and cellulose fiber.

The invention provides a production process of wool protein compound viscose fiber, which belongs to the technical field of viscose fiber. The process comprises the steps of preparing a wool protein spinning solution, blending the wool protein spinning solution with a viscose spinning solution, spinning, solidifying and curing and performing aftertreatment to obtain the wool protein compound viscose fiber. In the invention, the addition of toxic substances is avoided, the obtained finished product is more suitable for manufacturing the textile products with high safety, such as intimate apparels and the like, and shows the advantages in environmental friendliness.

The present invention discloses a protein synthetic fibre. It is formed from plant protein, animal protein and polyvinyl alcohol. The ratio of total weight of two proteins in fibre weight is: from 1% to less than 20% to from 20% to 40% of from greater than 40% to 99%, the rest is polyvinyl alcohol, and when the ratio of total weighto f two proteins in the fibre weight is from 20% to 40%, the ratio of one of them in the total weight of proteins is from 1% to 25% or from 75% to 99%. It also discloses the production method of said fibre. The fibre is good in breathable moisture permeability, and has the flexible and good dermophilic property of cashmere.

The invention discloses a biological protein wool fiber preparing method, which comprises the following steps: blending animal fur and fiber to produce soluble liquid in the ion liquid with positive and negative ion of fusing condition at 100 deg.c and positive ion to form salt; solidifying in the water, carbinol, alcohol, cyanoethyl or (NH4)2SO4 solution; adding adjuvant in the soluble liquid; solidifying in the water, carbinol, alcohol, cyanoethyl or 30 percent (NH4)2SO4 solution; evolving biological protein fur fiber.

The present invention belongs to the spinning field and provides a long or short filament of bamboo pupa protein fiber. The long or short filament comprises 10-40wt percent silkworm pupa protein spinning liquid and 60-90wt percent bamboo cellulose viscose as the raw materials. The present invention also provides a method for preparing of the long or short filament. With bamboo cellulose as the raw material, the present invention can still meet the quality standard. Since bamboo cellulose can be acquired easily, the present invention provides a new choice for spinning product-pupa protein fiber.