Preparation method of functional group modified aerogel particles for spinning and fiber spinning

Abstract

The invention provides a preparation method of functional group modified aerogel particles for spinning and fiber spinning. The functional group modified aerogel particles are prepared by the following steps: (1) mixing, (2) hydrolyzing, (3) condensing and dispersing, (4) further modifying surface functional groups, and (5) evaporating and drying a solvent. The surface functional group modified aerogel powder can be continuously produced or produced in batches, the manufacturing process is simple and convenient, and the manufacturing speed is high. According to the invention, the excellent acting force formed between the functional group modified aerogel powder and various plastics can be obviously improved, the composite mixing efficiency between the aerogel and the plastics is improved, and the dispersion of the functional group modified aerogel powder in the plastics is improved, so that the functionality of the aerogel composite material and the spinnability of subsequent fiber spinning are improved; the product can improve the special functions of heat insulation, cold resistance, light weight, fire resistance, molten drop resistance and the like of the plastic composite material and the spinning fiber.

Description

technical field [0001] The invention relates to a preparation method of functional group modified airgel particles for textile and fiber spinning, especially refers to the continuous process of sol-gel synthesis technology combining various functional group modifiers and aerogels, so as to improve Application properties of functional group modified airgel powder and its production speed. The present invention refers to adding a special functional group inside and on the surface of the airgel, so as to increase the binding force between the airgel powder and substrates such as subsequent processing plastics or adhesives, and promote the improvement of the airgel powder modified by the functional group. The amount of plastic and post-processing colloid added to the base material and the characteristics that the functional group modified airgel powder can form a uniform dispersion in the base material to improve the spinnability of the airgel composite fiber and improve the airge...

AI Technical Summary

Problems solved by technology

[0011] Therefore, in order to improve the past airgel powder in plastic composite processing, textile post-processing and fiber spinning process due to uneven dispersion of airgel, fiber spinning is easy to break and the properties of post-processing products are reduced, etc., the inventor proposes A method for preparing functional group-modified airgel particles for textile and fiber spinning by combining a functional group modifying agent and an airgel precursor, which comprises the following steps: (1) mixing step: mixing a silicone Alkoxysilane compound (alkoxysilane) such as tetramethoxysilane (tetramethoxysilane, TMOS) or tetraethoxysilane (tetraethoxysilane, TEOS) and other mixed functional group modified siloxane compound (function group modified alkoxysilane) such as methyl trisilicate Ester (Methyltrimethoxysilane, MTMS) or propylamine trisilicate methyl ester (Aminopropyltriethoxysilane, APTE) and add an organic mixed solvent to form a mixed solution, adding functional group modification in the process of functional group modified airgel powder (2) Hydrolysis step: adding an acid catalyst to the mixed solution to carry out the hydrolysis reaction, and some modified airgel processes can be hydrolyzed without adding an acid catalyst , there is no need to add acid catalyst; (3) Condensation and dispersion step: Add alkali catalyst to the mixed solution to carry out condensation reaction, and add hydrophobic dispersion solvent during the condensation reaction, and add high-speed stirring to make the mixed solution in the stirring process Form dispersed water-colloid particles with a particle size of 10nm-500μm, and then gel the water-colloid particles under high-speed stirring to form stable wet-colloid particles of 10nm-500μm

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