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Method for improving heat resistance of sisal fibers

A technology of sisal fiber and heat resistance, which is applied in the field of plant fiber processing, can solve the problems of poor high temperature resistance of natural sisal fiber, and achieves the effects of good dispersibility, improved heat resistance, and improved bundle fiber strength.

Active Publication Date: 2014-03-12
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] The present invention aims at the disadvantage of poor high temperature resistance of natural sisal fiber, and provides a method that can not only improve the heat resistance of sisal fiber, but also improve the strength of sisal fiber bundles, so that the sisal fiber can better adapt to asphalt Applications in high temperature environments such as mixtures

Method used

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  • Method for improving heat resistance of sisal fibers

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Embodiment Construction

[0021] During the implementation of the present invention, carry out according to the following steps:

[0022] Step 1: Cut ordinary sisal fibers into 1-3cm fiber segments, soak in saturated Ca(OH) 2 In the solution for 6 hours, remove the impurities on the sisal fiber, remove and drain the excess Ca(OH) 2 solution, only the Ca(OH) adsorbed by the sisal fiber 2 Solution, air-dried or oven-dried to obtain modified sisal fiber.

[0023] The second step: soak the modified sisal fiber obtained in the first step in the silica sol, soak for 20min, take it out, drain off the excess silica sol, and only keep the silica sol adsorbed by the modified sisal fiber, at a temperature of 60- Drying at 100°C to cross-link and solidify the silica sol, and the heat-resistant sisal fiber can withstand a high temperature of 350°C.

[0024] The obtained heat-resistant sisal fiber and the common sisal fiber soaked in 1%NaOH solution were used to carry out the thermal weight loss test under the sa...

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Abstract

The invention discloses a method for improving the heat resistance of sisal fibers. The method comprises the following steps: firstly, cutting general sisal fibers into sections, soaking the sections in a saturated Ca(OH)2 solution, removing impurities, fishing out, draining the excess Ca(OH)2 solution, and airing to prepare modified sisal fibers; secondly, soaking the modified sisal fibers in silica sol, taking out, draining the excess silica sol, stoving, and cross-linking and solidifying the silica sol, wherein the silica sol is alkaline silica sol and the mass percent concentration of SiO2 is 25%-40%. According to the method, a lot of cavities are formed in the rough surfaces of the sisal fibers treated with the saturated Ca(OH)2 solution; the silica sol is a low-viscosity solution with good dispersity, can fully permeate into the cavities of the sisal fibers and forms glassy-state substances on the surfaces of the sisal fibers, so that the sisal fibers are isolated from the outside through part of the glassy-state substances, and the heat resistance and the fiber bundle strength of the sisal fibers are improved.

Description

technical field [0001] The invention relates to a method for processing plant fibers, in particular to a heat-resistant treatment method for sisal fibers. Background technique [0002] Sisal is a common plant of the genus Agave. It is a perennial leaf fiber crop, and it is also one of the hard fibers with the largest consumption and widest application range in the world today. Sisal fiber is a renewable resource and can be naturally degraded. It not only has the characteristics of light weight, low price, and easy availability, but also its strength can meet the requirements of use in most cases. It has become an important material in the fields of concrete and polymer products processing. One of the fillers. [0003] Adding a certain amount of fiber materials in asphalt concrete can improve the high temperature stability and low temperature crack resistance of asphalt concrete, and can effectively increase the overall strength and flexibility of asphalt concrete. [0004]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/79D06M101/06
Inventor 王立华单景松郑金洋马俊明刘媛媛
Owner SHANDONG UNIV OF SCI & TECH
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