8 results about "Fiber crystal" patented technology

The present application relates to a kind of hafnium oxide inorganic fibers and its preparation method, the crystal phase of the described the hafnium oxide inorganic fiber is monoclinic phase, fiber diameter is 0.2 μm~7 μm, and keep fiber form integrity and crystal phase stability at high temperature 1500 ℃.Preparation method is with inorganic hafnium salt as hafnium source, organic ligand is used as hafnium ion stabilizer, by organic amine to remove hafnium salt anion, obtain hafnium oxide precursor, again with high molecular polymer as spinning aid, by electrostatic spinning technology or centrifugal fiber forming technology obtain hafnium oxide precursor fiber, precursor fiber is obtained hafnium oxide inorganic fiber after heat treatment.The present application has the advantages such as simple process, good sol stability and spinnability, high hafnium oxide solid content, low cost, no environmental pollution in heat treatment and the like.The prepared inorganic fiber crystal phase and microstructure are stable, fiber form is complete under high temperature condition, and the present application has application prospect in the fields such as high temperature gas filtration, high temperature heat insulation and the like.

The application relates to the technical field of alloy materials, in particular to a high-strength alloy material and a preparation process thereof. The application overcomes the problem that the mechanical properties and high-temperature resistance of alloy materials in the prior art cannot be considered simultaneously. The alloy component obtained by the application comprises Al-Li-Cu-Zr-Sc-Yb-In-Ag, and a hot-pressed alloy is obtained through high-temperature zirconium melting-low-temperature lithium pressing smelting, hierarchical homogenization, deformation heat processing, deep cooling and pre-strain dislocation network induction technology; then a bimodal structure coexisting with equiaxed fine crystals and elongated fiber crystals is constructed through gradient instantaneous annealing, and a dense carbon atom layer is deposited on the surface by combining chemical vapor deposition technology. The alloy material obtained by the application has good fatigue resistance and corrosion resistance, and is suitable for large thin-walled stressed components of aerospace vehicles and high-temperature protection fields.

The application provides a cotton cellulose and a preparation method thereof. The preparation method of the cotton cellulose of the application first processes waste cotton fabric through mechanical pulverization to cause peeling or slipping between fiber crystal surfaces, and breaks the cotton fibers into short fibers to obtain cotton short fibers; and then processes the cotton short fibers through DES under mild conditions to make the cotton short fibers swell and change the intermolecular or intramolecular hydrogen bond network of the fibers to different degrees to obtain cotton fiber products with different polymerization degrees; through the two-step processing of the application, the cellulose products with specific crystallinity and polymerization degree are obtained while the integrity of the original cotton structure is retained; and by adjusting the structure and composition of the DES, the cellulose with different crystallinity and polymerization degree can be prepared, the recycling efficiency of the waste cotton fabric is effectively improved, and the application has good economic benefits and application value.

The invention discloses soluble high-fiber sorghum flour and a preparation method thereof. The method comprises the following steps: soaking unhulled sorghum serving as a raw material in salt water to soften fibers; grinding, mixing with defatted soybean powder, and carrying out directional enzymolysis by using a compound enzyme, so that the content of starch is reduced, a fermentation carbon source is provided, and meanwhile, a lignin network is cracked to improve the dispersity and flavor; then bacillus licheniformis is inoculated for fermentation, fibers are softened by utilizing acid produced by metabolism of the bacillus licheniformis, protein and phytic acid are hydrolyzed by producing enzyme, and the solubility and flavor are remarkably improved; then fruit fibers are added, a fiber crystal structure is destroyed through homogenization, an emulsified network is formed, and the taste and the fineness are optimized; and finally, carrying out spray drying and fluidized bed granulation processes to obtain a finished product with excellent flowability, instant solubility and high fiber retention rate. While the dietary fiber nutrition of the whole sorghum grains is reserved to the maximum extent, the brewing property and sensory quality of the whole sorghum grains are effectively improved, and the market acceptability of the whole sorghum grains is improved.

The invention discloses an oiling agent for a carbon fiber precursor and a preparation method of the oiling agent. The oiling agent consists of 100 parts of carboxyl modified silicone oil, 30-50 parts of hydroxyl modified silicone oil, 2-5 parts of a solvent, 0.5-2 parts of a catalyst and 30-50 parts of an emulsifier, and is prepared by uniformly stirring and mixing the components and adding water for emulsification and phase inversion. The spinning oil agent prepared from carboxyl and hydroxyl modified silicone oil has the characteristics of higher chemical stability and better temperature resistance, a washable and high-toughness molecular protective film is formed on the surface of the precursor through a cross-linking reaction at a drying high temperature, and the steam drafting resistance of the carbon fiber precursor is improved; the orientation degree of fiber crystals is improved, fiber breakage is reduced, high-quality carbon fiber precursors can be obtained, and the tensile strength of carbon fibers is improved.

The invention discloses a method for regulating and controlling a cotton fiber crystal structure by using a ternary deep eutectic solvent system, which comprises the following steps: S1, immersing cotton fiber or cotton fabric subjected to boiling-off and desizing into a ternary DES solution, and treating at 80-100 DEG C for 30-90 minutes; the ternary DES solution consists of a hydrogen bond acceptor, a first hydrogen bond donor and a second hydrogen bond donor; the hydrogen bond receptor is choline chloride; the first hydrogen bond donor is glycerol, ethylene glycol, lactic acid or sorbitol; the second hydrogen bond donor is urea, betaine, thiourea or acetamide; s2, taking out the cotton fibers or the cotton fabrics treated in the step S1, washing and drying to obtain modified cotton fibers or modified cotton fabrics; through regulation and control of a multi-hydrogen-bond system on the acting force between cellulose molecules, ordered reconstruction of a cotton fiber crystal structure and improvement of the proportion of an amorphous region are realized, so that the dyeing affinity, the dyeing rate and the color fastness of the cotton fiber are remarkably improved.

The invention discloses a high-strength and high-toughness degradable PPDO / PBS blended monofilament and a preparation method thereof, and belongs to the technical field of high-molecular compounds obtained through reactions except for carbon-carbon unsaturated bonds, and the preparation method comprises the steps that poly (p-dioxanone) and poly (butylene succinate) are blended, a compatilizer is introduced, melt spinning and stretching orientation are performed after multi-section temperature-controlled extrusion, and the high-strength and high-toughness degradable PPDO / PBS blended monofilament is obtained. The high-strength and high-toughness degradable PPDO / PBS blended monofilament is obtained. By regulating and controlling the blending ratio, the melting temperature, the extrusion rate and the draw ratio of the poly (p-dioxanone) and the poly (butylene succinate), molecular chain orientation and fiber crystal formation are promoted, and the mechanical property, the thermal stability and the degradation controllability of the blended monofilament are remarkably improved. The crystallinity of the obtained blended monofilament reaches 40%-50%, the tensile strength is improved by 200% or above compared with pure poly (butylene succinate), the elongation at break is larger than 50%, and the blended monofilament is suitable for medical suture, soft tissue repair stents and drug sustained release carriers.

The invention relates to the technical field of aluminum alloy materials, and discloses an aluminum alloy wire and a preparation method thereof, an aluminum alloy component and a terminal product, the aluminum alloy wire comprises fiber crystals, and the fiber crystals are arranged in a fiber shape in the length direction of the aluminum alloy wire; wherein isometric crystal regions are distributed in partial regions of the fiber crystals, and precipitated phases are dispersed and distributed on a matrix of the fiber crystals. The aluminum alloy wire is a multi-heterogeneous aluminum alloy wire with fiber crystals, isometric crystals and precipitated phases, the interface density of the aluminum alloy wire is high, the strength, plasticity and conductivity of the aluminum alloy wire have synergistic matching performance, and the aluminum alloy wire has important significance in industrial production, popularization and application of traditional materials.