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Nondestructive surface modification method of basalt fibers

A basalt fiber and surface modification technology, applied in the field of materials, can solve the problems of further improvement of the comprehensive performance of the unfavorable radome material, damage to BF, strong equipment dependence, etc., to increase the roughness and chemical groups, wettability and so on. Improve and improve the effect of mechanical properties

Pending Publication Date: 2020-08-11
SHAANXI ACAD OF ARCHITECTONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional surface modification techniques (acid-base etching, ion etching, and coating, etc.) will damage the silicon skeleton of BF, or have a strong dependence on equipment, which is not conducive to the synthesis of radome materials prepared by BF-enhanced CE resin composites. Further performance improvements

Method used

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  • Nondestructive surface modification method of basalt fibers
  • Nondestructive surface modification method of basalt fibers
  • Nondestructive surface modification method of basalt fibers

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Embodiment

[0033] This embodiment relates to a method for non-destructive surface modification of basalt fibers, comprising the following steps:

[0034] Step 1, configuration of La-EDTA modified solution: in C 2 h 5 Add LaCl to the OH solution 3 ·nH 2 O, EDTA, HNO 3 , NH 4 Cl and CO(NH 2 ) 2 , stirring, standing at room temperature, and then filtering the precipitate to obtain a La-EDTA modified solution;

[0035] Step 2: Soak the basalt fibers in alcohol to remove surface impurities, repeatedly wash with deionized water, dry, add to the La-EDTA modification solution, soak, wash with deionized water, heat treat and dry.

[0036] Wherein, in step 1, the LaCl 3 ·nH 2 O, EDTA, HNO 3 , NH 4 Cl and CO(NH 2 ) 2 The contents are respectively 1wt%, 2wt%, 0.5wt%, 1wt% and 5wt%; the standing time is 2 hours; the pH value of the La-EDTA modified solution is 6-7.

[0037] In step 2, the alcohol is soaked for 2 hours, the number of repeated washings is 10 times, the soaking time is 48 ...

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Abstract

The invention provides a nondestructive surface modification method of basalt fiber. The nondestructive surface modification method comprises the following steps: preparing a La-EDTA modified solution; soaking basalt fiber with alcohol, removing surface impurities, repeatedly washing the basalt fiber with deionized water, carrying out drying, and adding the treated basalt fiber into the La-EDTA modified solution; and successively carrying out soaking, washing with deionized water, heat treatment, and drying. According to the method disclosed by the invention, the surface structure, morphologyand functional groups of the basalt fiber are changed, so the mechanical properties of cyanate ester resin matrix reinforcing materials for radomes and other objects with low dielectric constant requirements and the wettability of a resin matrix are improved. On the premise that the silicon skeleton of the basalt fiber is not damaged, the method convenient and rapid to use and independent of complex equipment improves the monofilament tensile property and mechanical properties of the basalt fiber. A rough La-HEEDTA crystal layer is deposited on the surface of the modified basalt fiber, so theroughness and chemical groups of the surface of the basalt fiber are increased. The improvement of surface roughness and the change of chemical functional groups result in the improvement of wettability with BADCy.

Description

technical field [0001] The invention relates to the field of materials; in particular, it relates to a non-destructive surface modification method of basalt fibers. Background technique [0002] Cyanate ester resin (CE, Cyanate Ester) has excellent dielectric properties, mechanical properties and thermal stability, and is often used in the form of fiber-reinforced composite materials. It is an ideal resin matrix for radome materials. Basalt fiber (BF, Basalt Fiber) is a natural material with excellent mechanical and dielectric properties and high cost performance. As a reinforcing fiber for CE to prepare resin-based composites for radome, it has broad engineering application prospects. However, the smooth surface, low chemical activity and poor alkali resistance of BF limit the application and development prospects of BF in BF reinforced CE resin composites (BRCE, Basalt fiber reinforcedCyanate Ester Composites). Therefore, it is necessary to improve the surface roughness a...

Claims

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Application Information

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IPC IPC(8): C03C25/465C03C25/007C03C25/002C03C25/00
CPCC03C25/465C03C25/007C03C25/002C03C25/00
Inventor 朱苗淼李妍孙永民
Owner SHAANXI ACAD OF ARCHITECTONICS