29 results about "Microfibril" patented technology

The invention discloses a preparation method of a controllable silk fibroin extracellular skeleton gel material for injection. The composite filler is prepared from the following raw materials in parts by mass: 5-50 parts of silk fibroin, 0.01-5 parts of cellulose and 0.7-10 parts of hyaluronate. The preparation method comprises the following steps: (1) preparation of silk fibroin microfiber gel: adding cellulose into a silk fibroin aqueous solution to prepare gel, crushing and sieving to obtain the silk fibroin microfiber gel; and (2) preparation of an extracellular skeleton gel material: mixing hyaluronate with the silk fibroin microfiber gel, and carrying out physical crosslinking to form the silk fibroin extracellular skeleton gel material. After the modified silk fibroin hydrogel prepared by the method is injected, in-situ tissue regeneration can be promoted, the molecular weight is controllable, the crosslinking degree is controllable, the structure of the modified silk fibroin hydrogel is similar to that of an extracellular matrix (ECM), the degradation process is matched with the in-situ tissue regeneration process, and the modified silk fibroin hydrogel is well improved in the aspects of mechanical property, degradation performance, biocompatibility and the like and has good application prospects. No chemical cross-linking agent is used, and the injection has injectability, and has a very good application prospect in the field of medical beauty injection.

The invention provides a preparation method and application of a magnetic biochar adsorption material, and relates to the technical field of biochar adsorption materials. The adsorption material is prepared by taking three kinds of biomass including municipal sludge, straw and antimony ore waste residues as biochar sources and further loading magnetic nano gamma-Fe2O3 particles. In the process, by controlling the mass of the municipal sludge, the straw and the antimony ore waste residues, the composition and performance of the biochar base material in the adsorption material can be regulated and controlled, rich active sites in the sludge and the straw are fully utilized, loading of the magnetic nano gamma-Fe2O3 particles is achieved, and the adsorption efficiency is improved. A microfibril structure in the straw and a high-activity mesoporous carrier in the antimony ore waste residue not only can improve the load rate of the magnetic nano gamma-Fe2O3 particles to a certain extent, but also can be beneficial to diffusion and capture of heavy metal ions in the application process, so that the adsorption rate of the material to the heavy metal ions is improved on the whole.

To provide a method for easily producing a recycled meta-type wholly aromatic polyamide fiber by reducing microfibrils present in a recycled meta-type wholly aromatic polyamide polymer solution as much as possible.SOLUTION: A method for producing a meta-type wholly aromatic polyamide fiber comprises: a dissolution step of subjecting a meta-type wholly aromatic polyamide fiber to a dissolution treatment in a solvent containing 50 to 90 mass% of an amide-based solvent and 0 to 5 mass% of an inorganic salt at 60 to 90°C for 2 to 30 hours, thereby obtaining a polymer solution in which the weight of microfibrils relative to the total amount of the meta-type wholly aromatic polyamide polymer in the solution is 0.015 mass% or less; a spinning step of discharging the meta-type wholly aromatic polyamide polymer solution into a coagulation bath to obtain an undrawn yarn; and a drawing step of drawing the undrawn yarn obtained in the spinning step to obtain a drawn yarn.SELECTED DRAWING: None

A method for preparing hydrophobic, dry, surface-modified fibrillated cellulose to improve its dispersibility in a hydrophobic matrix comprises the steps of: a.) providing a suspension of microfibrillated cellulose from 5 to 30 wt%, preferably from about 7 to 11 wt%, in water; b.) adding a surfactant to the suspension in a mass ratio of surfactant to microfibrillated cellulose suspension of 0.1 to 2.0 wt%, preferably 0.5 to 1.0 wt%, more preferably about 0.8 wt%; c.) adding a surface modifier to the suspension in a mass ratio of surface modifier to microfibrillated cellulose dry matter of 20 to 300 wt%, preferably 80 to 120 wt%, more preferably about 100 wt%, where the surface modifier is obtained by a chemical reaction of a silane compound with a phenolic compound to form a covalent bond between the silane compound and the phenolic compound; d.) covalently binding the surface modifier with the microfibrillated cellulose by (i) hydrolysis of the surface modifier to form a reactive silanol group (R-Si-OH) and (ii) condensation of the silanol group of the surface modifier with the available OH-group of the microfibrillated cellulose; e.) adding a plasticizer to the surface-modified microfibrillated cellulose suspension; f.) drying the suspension to remove water and obtain a dry powder of surface-modified microfibrillated cellulose.

The present disclosure provides a microporous hollow fiber web that includes connected hollow fibers. At least some of the hollow fibers have an open-pored porous structure that includes microfilaments connecting a lamellar microstructure. Methods of making microporous hollow fiber webs are also provided. Such methods include obtaining a hollow fiber web having connected hollow fibers, and stretching the hollow fiber web in a machine direction to break at least a portion of the hollow fibers to create an open-cell porous structure.

The invention belongs to the technical field of spectral analysis, and discloses a plant cell wall microfibril orientation polarization Raman spectrum measurement method, which comprises: 1, carrying out polarization Raman spectrum data acquisition on a sample to be measured; step 2, acquiring required data based on a data acquisition result of the polarization Raman spectrum; 3, performing nonlinear parameter fitting on the required data, obtaining an optimal parameter combination and a corresponding coefficient through a minimum error function, and performing forced symmetry post-processing on the optimal Raman tensor matrix; step 4, calculating a microfilament angle of a corresponding angle according to the symmetrical tensor parameter; in the fourth step, based on the symmetrical tensor matrix, the angle needed for rotating the tensor matrix to the main axis direction is calculated; and carrying out normalization processing on the calculated angle value. The technical problems that in the prior art, due to the fact that a nonlinear fitting algorithm is complex and prone to being affected by noise and experimental errors, the fitting convergence effect is poor, and the stability and reliability of a detection result are insufficient are solved.

The invention relates to the technical field of medicines, in particular to a medical application of MFAP2 (Microfibril Associated Protein 2). It is found through a large number of experiments that the expression quantity of MFAP2 in heart tissue is reduced along with the increase of time points after newborn rats are born. A myocardial infarction model is established by adopting an anterior descending branch ligation method, an MFAP2 mouse in-vivo overexpression model is established by adopting a caudal vein AAV virus injection method, and it is found that reduction of the cardiac contraction function after myocardial infarction is relieved through mouse in-vivo overexpression of MFAP2. Meanwhile, the fibroblast overexpressing the MFAP2 promotes the proliferation of myocardial cells. The result shows that the MFAP2 protein reduces the cardiac infarction area and improves the cardiac systolic function of patients suffering from myocardial infarction and heart failure by stimulating myocardial cell proliferation and promoting heart regeneration and repair, and can be used as an effective factor for promoting heart repair of patients suffering from cardiovascular diseases.

This invention belongs to the field of antitumor drug delivery technology, and discloses a dual-drug sequential delivery system, a composite hydrogel, its preparation method, and its applications. This invention achieves sequential release by encapsulating a cobalt (Co)-polyphenol coordination nanozyme (CoNZ) in a hydrogel and integrating it with microfibrils loaded with chloroquine (CQ). This invention provides a promising new approach to improving the treatment of CRPC by initially inducing ROS-mediated oxidative damage, subsequently inhibiting autophagy and blocking the TLR9 / NF-κB signaling pathway, synergistically disrupting the survival mechanisms of tumor cells.

The application discloses lignocellulose microfibril and a preparation method thereof, and comprises the following steps: 1) performing enzyme treatment on agricultural straw; 2) performing alkali activation treatment on the agricultural straw treated in the step 1); and 3) performing mechanical grinding on the agricultural straw treated in the step 2) to obtain lignocellulose microfibril. The application directly performs microfibril treatment on the whole component of the agricultural straw lignocellulose by combining the biological treatment, the alkali activation treatment and the mechanical grinding with different gradient concentrations, has high production efficiency, avoids the cost increase and the environmental load caused by the component separation of the agricultural waste in the traditional method, and the prepared lignocellulose microfibril has both the mechanical strength of cellulose and the thermosetting property of lignin, and can be applied in the fields of thermosetting resin, plastic blown film and hot-press forming and the like.

The present invention relates to a modified pulp with a moisture content of less than 15% and a certain content of microfibrils and pre-fibrillated fibres. The modified pulp can, after suspension, be used either directly or be subjected to additional refining. The present invention also relates to a method of producing a fibrous product using the modified pulp.

A porous polytetrafluoroethylene (PTFE) membrane including a nonwoven web having a microstructure of substantially only microfibrils fused at crossover points, said membrane having a percent balance of orthogonal dimensions that is within 10%.

The application discloses a preparation method of a UV photocuring, solvent-free type nickel inner electrode paste, and specifically comprises the following steps: step 1, preparing acrylic modified cellulose microfibril; step 2, synthesizing a UV photocuring resin; step 3, synthesizing a nickel complex; step 4, preparing a nickel inner electrode paste according to the products obtained in steps 1-3; and step 5, preparing a ceramic paste according to the product obtained in step 4. The application further discloses the UV photocuring, solvent-free type nickel inner electrode paste and application thereof in multilayer ceramic capacitors. The electrode paste prepared by the application does not need to remove solvent by heating, avoids the problem of uneven solvent drying, and improves the yield and performance of devices.

The invention discloses a rice stem multi-scale mechanical simulation modeling method, device and equipment and a medium. The method comprises the following steps: selecting a second base node stem of a mature period base of a rice variety to be tested as a sample; microcosmic characteristic parameters of the sample are extracted; based on the extracted microscopic characteristic parameters, material parameter calculation is carried out based on an HP-TS equation, hemicellulose-lignin matrix equivalent calculation, cellulose-matrix composite equivalent calculation, flexibility matrix and initial stiffness matrix construction and microfibril angle correction are completed in sequence, and an engineering constant of each layer of cell wall is obtained; performing image processing on the rice stalk paraffin section; constructing a rice stem tissue three-dimensional shell finite element model based on the cellular morphology contour and topological information obtained through image processing and the cell wall engineering constants obtained through calculation, and executing finite element simulation; actual measurement data are obtained through a rice stem tensile test and compared with a finite element simulation result for verification, and rice stem multi-scale mechanical simulation modeling is completed.

The present invention provides a preparation method and application of a magnetic biochar adsorption material, and relates to the technical field of biochar adsorption materials. The above-mentioned adsorption material is prepared by using three kinds of biomass, namely municipal sludge, straw and antimony mine waste residue, as biochar sources, and further loading magnetic nano-γ-Fe2O3 particles. In the above process, by controlling the quality of municipal sludge, straw and antimony mine waste residue, the composition and performance of the biochar substrate in the adsorption material can be regulated, and the rich active sites in the sludge and straw can be fully utilized to achieve the loading of magnetic nano-γ-Fe2O3 particles. The microfibril structure in the straw and the high-activity mesoporous carrier in the antimony mine waste residue can not only improve the loading rate of the magnetic nano-γ-Fe2O3 particles to a certain extent, but also facilitate the diffusion and capture of heavy metal ions during the application process, thereby improving the adsorption rate of the material to heavy metal ions as a whole.

The application discloses a kind of preparation method and product of high-strength high-toughness degradable polylactic acid 3D printing consumables, comprising, base, fiber-forming phase, compatibility agent, talcum powder, antioxidant are dried, after being mixed uniformly, by extruder melt blending extrusion, preparation is made into blend and is dried;The extrusion of the dried blend is carried out in multistage stretching 3D printing consumables extrusion device, by controlling extrusion process, to prepare high-strength high-toughness degradable polylactic acid 3D printing consumables.The application in the preparation process of polylactic acid 3D printing consumables, using layer multiplier is strongly sheared and stretched to polymer melt, to realize dispersed phase material in-situ fiber-forming in PLA matrix, and the dispersed phase microfibril formed further induces PLA to form the crystal form of special "shish-kebab" structure, the formation of this crystal form can greatly improve the toughness of polylactic acid 3D printing consumables, more importantly, it can also significantly improve the tensile strength and modulus of consumables.

The invention relates to a wet chemical metal ion purification medium, the purification medium is in the form of a microporous membrane, a chelating group is loaded on the microporous membrane to form a chelating membrane, and the IPA bubble point of the chelating membrane is 60-320 kPa; the chelating film comprises a porous body with a liquid inlet face and a liquid outlet face as boundaries and a liquid inlet skin layer located on the liquid inlet side of the porous body, the side, away from the liquid outlet face, of the liquid inlet skin layer is the liquid inlet face of the chelating film, and a non-directional zigzag channel is formed in the porous body so that the chelating film can be communicated from the liquid inlet face to the liquid outlet face. The liquid inlet surface is provided with liquid inlet holes with the average roundness coefficient R of 0.1-0.6, microfiber structures are arranged in at least part of the liquid inlet holes, at least one end of each microfiber structure is connected to the hole wall of the corresponding liquid inlet hole, and the area ratio of the liquid inlet holes in the liquid inlet surface is 10%-40%. Compared with the prior art, the chelating membrane provided by the invention has the advantages of higher flow velocity, higher filtering efficiency and higher metal ion purification effect.

The invention relates to a method for producing a shred filler tobacco material with improved filling force, comprising the following steps: providing a binder to loose tobacco leaves (1) wherein the binder at least partially coats individual loose tobacco leaves (1), thereby forming an at least partial coating layer on the tobacco leaves (1), the method further comprises a charging step wherein the tobacco leaves are provided with at least one charging and wherein the tobacco leaves are provided with at least one additive (12), the method further comprises a flavoring step wherein the tobacco leaves are provided with at least one additive (12), wherein at least one flavoring component is provided to the tobacco leaves and wherein the binder is provided during the charging step, the mixing step or the flavoring step. The invention also relates to a shred filler tobacco material comprising loose tobacco leaves (1) and a binder, where the binder at least partially coats individual loose tobacco leaves (1), thereby forming an at least partial coating layer on the loose tobacco leaves (1), and where the binder comprises at least one of: tragacanth gum and water, the present invention relates to a composition comprising a cellulose nanocrystal, microfibrillated cellulose and water, cellulose nanocrystals and water, 2 to 8% dry matter dextrin and water, and 0.1 to 9% dry matter carboxymethyl cellulose and water. The invention also relates to the use of a binder to improve the filling force of a shred filler tobacco material comprising loose tobacco leaves (1) wherein the binder at least partially coats individual loose tobacco leaves (1), thereby forming an at least partial coating layer, and wherein the binder comprises at least one of: tragacanth gum and water, the present invention relates to a composition comprising a cellulose nanocrystal, microfibrillated cellulose and water, cellulose nanocrystals and water, 2 to 8% dry matter dextrin and water, and 0.1 to 9% dry matter carboxymethyl cellulose and water.

The invention provides a leather-based samarium boride composite material as well as a preparation method and application thereof, and belongs to the technical field of shielding materials. The samarium boride is loaded on the natural leather to prepare the novel natural leather composite shielding material, and Sm and B in the samarium boride have large neutron absorption cross sections, so that thermal neutrons can be well absorbed, and the shielding effect is good. Meanwhile, samarium boride is stabilized and dispersed in the natural leather by dipping by utilizing a multi-level supramolecular assembly structure formed by an amino acid-polypeptide chain-triple helix strand-microfibril-fibril-collagenous fiber-fiber bundle-fiber network three-dimensional framework of the natural leather, so that effective combination of samarium boride and a leather substrate is realized; the dispersity of the samarium boride filler is improved, and the high-performance neutron protection material based on the leather matrix is obtained.

The present disclosure provides microporous hollow fiber webs, including connected hollow fibers. At least some of the hollow fibers have an open celled porous structure including microfibrils that connect lamellae microstructures. Methods of making microporous hollow fiber webs are also provided. Such methods include obtaining a hollow fiber web having connected hollow fibers, and stretching the hollow fiber web in a machine direction to fracture at least a portion of the hollow fibers to generate an open celled porous structure.

To provide a scattering preventive agent that uses cellulose-derived materials, and, while having good scattering prevention effects, is resistant to gelling even when stored at high concentrations, and can be easily discharged in a good state with relatively low stirring force during dilution.SOLUTION: A scattering preventive agent is made using microfibrillated cellulose with an average fiber width larger than 1.0 μm and a solvent. The microfibrillated cellulose may be chemically modified microfibrillated cellulose. Additionally, the scattering preventive agent can also be used to prevent the scattering of organic multi-materials.SELECTED DRAWING: Figure 1

The purpose of the present invention is to provide an agrochemical composition that floats on water and that exhibits excellent diffusibility and excellent particle disintegration.　The agrochemical composition that floats on water comprises an agrochemical active ingredient, a fibrous material, and an acetylene glycol-based surfactant. The fibrous material contains an aggregate of microfibrils formed from cellulose, and the average fiber length of the microfibrils is 10 to 1,000 μm.

A process for producing dried, vinyl carboxylate surface-modified microfibrillated cellulose having improved mechanical properties and a microfibril structure and a process for producing a vinyl carboxylate, surface-modified microfibrillated cellulose-thermoplastic polyester or thermoplastic polyolefin composite material having improved mechanical strength properties utilizing dried, vinyl carboxylate surface-modified microfibrillated cellulose.

A porous polytetrafluoroethylene (PTFE) membrane including a nonwoven web having a microstructure of substantially only microfibrils fused at crossover points, said membrane having a percent balance of orthogonal dimensions that is within 10%.

To provide a membrane having symmetrical strength for certain applications such as a fuel cell and the like.SOLUTION: Porous polytetrafluoroethylene membranes comprising polytetrafluoroethylene are joined at texture points and are nonwoven webs having microfibril microstructures of less than 100 node / 100 μm2. The membrane has tensile peak stress in a longitudinal direction and tensile peak stress in a lateral direction. The tensile peak stress in the longitudinal direction is 10% or below the tensile peak stress in the lateral direction. The tensile peak stress in the longitudinal direction and the tensile peak stress in the lateral direction are 130 MPa or less at room temperature.SELECTED DRAWING: None

The present invention relates to a modified pulp with a moisture content of less than 15% and a certain content of microfibrils and pre-fibrillated fibres. The modified pulp can, after suspension, be used either directly or be subjected to additional refining. The present invention also relates to a method of producing a fibrous product using the modified pulp.

The present invention addresses the problem of providing: a microfibril cellulose which has excellent dispersibility in a rubber composition; and a rubber composition which comprises the microfibril cellulose and a rubber component. The present invention also addresses the problem of providing a crosslinked rubber composition which is obtained by crosslinking the rubber composition.　The microfibril cellulose of the present invention has an average fiber width of 1 μm to 100 μm inclusive and a polymerization degree of 50 to 500 inclusive.

Method for the manufacturing of an elongated, e.g. microfibril structure for the fabrication of cultivated meat, wherein(a) a paste is extruded through an extrusion plate (24) and an adjacent attachment plate (22) with aligned nozzle openings (42, 44) into a space (58) downstream of the second nozzle plate (22),(b) paste located in said space (58) or in the attachment plate (22) is hardened,(c) said paste is continued to be extruded through said extrusion plate (24) while the distance between the attachment plate (22) and the extrusion plate (22) is increased under formation of said elongated, e.g. microfibril structure between said plates (22,24).

A shaving device includes a handle attached to a razor head carrying at least one razor blade. The handle is a molded fiber part having an elongated hollow body open on one side. The shaving device may also include reinforcing elements arranged in the elongated hollow body that forms the handle, a plurality of reinforcing ribs spaced apart from one another and traversing the elongated hollow body of the handle in a transverse direction with respect to the handle, reinforcing ribs that completely fill a U-shaped cross-section of the elongated hollow body of the handle, reinforcing ribs having a height that is significantly less than a height of the handle, and / or at least one longitudinal rib in the elongated hollow body of the handle. The molded fiber part may include a mixture of long fibers, short fibers and microfibrils. The fiber blend may have a mixture of hemp fibers.

The present invention relates to a modified pulp having a moisture content of less than 15% and a content of microfibrils and pre-fibrillated fibers. The modified pulp may be used either directly or subjected to additional refinement after suspension. The invention also relates to a method for producing a cellulosic product using the modified pulp.