13 results about "Collagen fiber" patented technology

The present application belongs to the field of textile spinning technology, and particularly relates to a low-hairiness high-strength spinning process of collagen fiber and combed pure cotton fiber blending. The spinning process comprises the following steps: putting the screened collagen fiber and combed pure cotton fiber into a cotton blender for preliminary mixing, spraying an antistatic agent and a softening and moisturizing agent on the mixed fiber for pretreatment, feeding the pretreated mixed fiber into an opener to obtain a lap, then feeding the lap into a carding machine to output a sliver, doubling the sliver in a drawing frame to obtain a roving, feeding the roving into a compact Sirospun spinning frame to output a spun yarn, and obtaining a cheese yarn through an automatic winder. The yarn prepared by the method has the advantages of high strength, less hairiness, uniform evenness, and skin-friendly comfort.

The present application relates to a kind of methods for preparing skin-based eutectic gel using chrome-free tanning blank and polymerizable deep eutectic solvent.The method prepares polymerizable deep eutectic solvent with betaine and acrylic acid, dissolves initiator in it to prepare dipping solution, then adds chrome-free tanning blank, stirs for 4-48 hours at 5-30 ℃, then heats chrome-free tanning blank at 40-80 ℃ for 2-12 hours to obtain skin-based eutectic gel.The skin-based eutectic gel prepared by the method inherits the original high mechanical strength of chrome-free tanning blank, and the three-dimensional network of polymer formed in situ forms network interpenetrating structure with the original three-dimensional network of collagen fibers in leather blank, further improves the mechanical strength of skin-based eutectic gel, thereby effectively solving the problems of insufficient network structure stability, poor mechanical strength and deep eutectic solvent leakage of traditional eutectic gel.The raw materials of the present application are easy to obtain, low in price, and the preparation process is simple and easy to scale up.

Disclosed in the present invention is a limiting expandable aortic valvular conduit. The limiting expandable aortic valvular conduit comprises a preliminary aortic valvular conduit attached with a collagen fiber coating, wherein the preliminary aortic valvular conduit comprises a proximal pipeline, a valve connecting conduit, and a distal conduit. Further disclosed in the present invention is a preparation method therefor. The limiting expandable aortic valvular conduit provided in the present invention is used for Bentall-type surgeries. Moreover, after the bioprosthetic valve deterioration, the limiting expandable aortic valvular conduit provided in the present invention provides the conditions for implanting a bioprosthetic valve of the same size as the original valve via an interventional approach; that is, after the biological valve deterioration, a valve of the same size as the original valve can be implanted via an interventional approach, without opening the chest of a patient to replace the biological valve of the same size.

The application belongs to the technical field of adsorbing materials, and particularly relates to a high-selectivity strontium adsorbing material, a preparation method and application. The preparation method of the high-selectivity strontium adsorbing material comprises the following steps: loading rare earth ions on collagen fibers to obtain an intermediate material; and reacting an oxalate salt and a dimethylamine cation mixed solution with the intermediate material to generate a MOF crystal material with cavities in situ. The application takes dimethylamine cations as exchange ions, and the crystal structure formed by the coordination of rare earth ions and oxalate ions has a cavity size matching the hydrated ion radius of strontium, and has high selectivity to strontium ions, so that the strontium ions can be removed with high selectivity in the presence of various ions.

The application provides a wool collagen antibacterial fabric and a preparation method, and belongs to the field of functional textile materials and manufacturing process textile technology. The shrink-resistant wool yarn and collagen yarn are used as raw materials, and the collagen yarn is composed of marine fish collagen viscose and cotton fibers. The wool yarn is prepared through the following processes: wool yarn: strip dyeing, rewashing, wool splicing, secondary combing, fore-spinning, spinning, self-winding, doubling, doubling, steaming. The collagen yarn is prepared through the following processes: loose bobbin, dyeing, drying, and reversing the bobbin. Weaving: warping, harnessing, weaving, inspection, and repair. Post-finishing: singeing and dust collection, continuous cooking, drying, tank steaming, finishing, washing, separation, lining cooking, drying, intermediate inspection, finishing, brushing, calendering, tank steaming, and finished product. The advantages of wool and collagen fibers are successfully combined, and through process innovation, a multifunctional fabric with antibacterial, moisturizing, comfortable and high-end texture is created, solving the problems of single function and difficult processing in the prior art.

This invention discloses a pH-responsive MOF nanocomposite chromium-free tanning agent, its preparation method, and its application, belonging to the technical field of chromium-free tanning agents for leather. The method disclosed in this invention involves forming a ligand with a borate ester module through the dehydration condensation of 4-carboxyphenylboronic acid and tartaric acid, and then binding zirconium to the ligand via a solvothermal method to form a MOF tanning agent. Subsequently, zirconium tartrate is loaded onto the MOF, enabling controlled release of zirconium tartrate through a pH-responsive switch in the ligand. This improves the problem of uneven tanning caused by the rapid and strong binding of zirconium ions to collagen fibers, resulting in tanned leather with a shrinkage temperature exceeding 80 °C, thereby effectively improving the quality of zirconium-tanned leather products.

The present application provides a collagen fiber interpenetrating hyaluronic acid or salt composite gel, a preparation method and application thereof, in which the collagen fibers are uniformly dispersed in the inside and outside of the cross-linked hyaluronic acid or salt gel, forming a collagen fiber and hyaluronic acid or salt gel interpenetrating double cross-linked network structure. The collagen fiber interpenetrating hyaluronic acid or salt composite gel has more excellent mechanical strength, supporting performance and anti-degradation performance, can fully exert the respective advantages of hyaluronic acid and collagen, solve the technical problems such as easy precipitation of the mixture of the two in the prior art, swelling of the product after injection, and the like, and the fibrous collagen is closer to the structure of collagen in the human body, has a better cell adhesion and proliferation effect, and promotes cell ingrowth and tissue regeneration.

This invention relates to a method for preparing iodine adsorbent materials using zeolite tanned leather scraps. The method uses zeolite tanned leather scraps as raw material, which are activated with alkali at 20-60°C for 2-10 hours. Then, a nitrogen-containing modifier and a dialdehyde crosslinking agent are added to the activated zeolite tanned leather scrap dispersion, and the mixture is stirred at 20-60°C for 4-12 hours. After filtration and drying, the iodine adsorbent material is obtained. This method increases the adsorption active sites of collagen fibers in the zeolite tanned leather scraps through graft modification. Relying on the synergistic effect of "collagen fiber-zeolite," it combines the advantages of physical, chemical, and ion exchange adsorption, exhibiting large adsorption capacity, fast adsorption rate, and strong selectivity. It can be used for the adsorption of gaseous / liquid iodine. This method is both a green treatment technology for zeolite tanned leather scraps and provides a highly efficient adsorbent material for the remediation of radioactive iodine pollution, aligning with the circular economy and green development concept of "treating waste with waste." This invention has a simple process, widely available raw materials, low cost, and is suitable for large-scale production.

The utility model discloses a kind of fish leather product production are used to remove fishy smell device, comprising: soaking tank, central position is equipped with rotary seat, the rotary seat has fixed part and rotary part, the central position of the rotary part is equipped with water guide channel;Water guide column is equipped with water guide cavity, the water guide cavity is communicated with the water guide channel, the water guide cavity is equipped with several water guide ports;Water guide pipe is inserted in the water guide port, pipe wall is equipped with several through holes;Circulating water tank is equipped with first pipeline and second pipeline, first pipeline and second pipeline communicate the soaking tank and the circulating water tank constitute circulating water path, the circulating water tank is also equipped with third pipeline, the third pipeline passes through the fixed part and is communicated with the water guide channel.The soaking liquid of the utility model can fully contact the inner wall of tubular fish leather, and the fishy smell substance between collagen fiber gaps is released by water flow impact, which greatly improves the removal rate of fishy smell substance and solves the problem that the inner wall of fish leather is difficult to reach in traditional soaking.

The application belongs to the technical field of biological medicine, and particularly relates to a recombinant collagen repair solution and a preparation method and application thereof. The application comprises the following steps: preparation of a protein activity enhancer; preparation of a recombinant humanized collagen fiber sol; and photo-polymerization construction of a recombinant humanized collagen hydrogel. The application is modified by sulfate esterification of pollen of apiaceae polysaccharide, and is compounded with the recombinant humanized collagen. The application can not only form a stable complex with the positively charged collagen amino acid residues through electrostatic interaction, maintain the natural triple helix conformation, reduce the aggregation and denaturation of the collagen, and enhance the activity of the collagen, but also can assist the recombinant humanized collagen in activating the cell surface receptors, enhancing the adhesion and proliferation of the cells, thereby enhancing the epidermal regeneration capacity of the recombinant humanized collagen, effectively improving the bioavailability of the recombinant humanized collagen at the wound site, and improving the repair and treatment effect on the wounded skin.

The present application belongs to the technical field of flexible electronics, and particularly relates to a leather-based flexible capacitive pressure sensor and a preparation method thereof. The sensor integrates a dielectric layer and an electrode layer. The method uses the thickness and natural hierarchical structure of leather to realize the leather-based flexible capacitive pressure sensor integrating the dielectric layer and the electrode layer. First, based on the tanning theory, zirconium salt is selected to modify the leather collagen fiber. Zirconium ions interact with the leather collagen fiber, enhance the polarity of the leather collagen fiber, increase the dielectric constant of the whole leather, and thus improve the dielectric property of the leather, which is used as the dielectric layer of the sensor. Then, pyrrole is selected to in-situ polymerize polypyrrole on the upper layer of the nipple layer and the lower layer of the reticular layer of the leather, so as to endow the leather with excellent conductivity, which is used as the electrode layer of the sensor, and thus the leather-based flexible capacitive pressure sensor integrating the dielectric layer and the electrode layer is obtained.

This invention provides a fish skin collagen extract and its application in anti-aging and anti-wrinkle treatments, belonging to the field of biomedical materials. This invention utilizes biomimetic mineralization technology, using collagen fibers as templates to guide the in-situ growth of zeolite molecular sieves, constructing a nano-confined reactor, and then employing a vitamin C / copper ion catalytic system for directional shearing to precisely prepare collagen peptides with molecular weights concentrated in the 1000-1500 Da range. This extract possesses excellent functions in promoting collagen synthesis, anti-oxidation, anti-glycation, and repairing the skin barrier, solving the problems of existing collagen peptide products such as a single anti-aging mechanism, wide molecular weight distribution, uncontrollable activity, and potential sensitization. The preparation process of this invention is simple and mild, and the product has high activity and good safety, making it suitable for preparing high-end anti-aging and anti-wrinkle cosmetics.