4 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 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.