A kind of preparation method of waste textile gas-retardant gel
A waste textile and aerogel technology, which is applied in the field of waste textile recycling, can solve problems such as easy ignition, and achieve the effects of high production efficiency, good repeatability, and easy mass production.
Active Publication Date: 2021-09-07
SICHUAN UNIV +1
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Problems solved by technology
However, waste textile aerogels are easy to ignite, which makes it unsuitable for use in the field of flame retardancy. Therefore, the flame retardant modification of waste textile aerogels is crucial to expand its application fields, but it is still a challenge.
At present, there is no report on the process of preparing flame-retardant gas gel from waste textiles. After the waste textiles are crushed, they are treated with an alkali system, dissolved under low temperature conditions, stirred evenly, and a certain amount of flame retardants and cross-linking agents are added. Form a hydrogel, and finally obtain a flame-retardant gas gel by freeze-drying
Method used
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[0041] Waste cotton fabrics with a size of 5cm×5cm were ultrasonically cleaned with acetone and ethanol for 20 minutes, dried, crushed, and set aside. Prepare 100ml of 7wt.% sodium hydroxide / 12wt.% urea aqueous solution, add 2g of pulverized waste cotton fabric samples into it, stir evenly, and freeze in the refrigerator for 12h. Thaw at room temperature, add 0.5-3g of zinc borate, stir evenly, dropwise add 9ml of epichlorohydrin, stir magnetically for 1h, place the whole sample in a constant temperature water bath at 50°C for 20h, and obtain a hydrogel sample. The hydrogel sample was washed with deionized water until the solution was neutral, and then pre-frozen at -50°C for 6 hours, and then freeze-dried at 10 Pa for 48 hours to obtain a gas-retardant gas gel sample. The heat release rates of the obtained waste textile airgel and zinc borate / waste textile composite airgel were 190.70 W / g and 35.76 W / g, respectively, indicating that the zinc borate / waste textile composite air...
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The invention belongs to the field of recycling waste textiles, and in particular relates to a gas-retarding gel prepared from waste textiles and a flame retardant. The invention provides a method for preparing a gas-retardant gas gel from waste textiles and a flame retardant. After the waste textiles are pulverized, they are treated with an alkali system, dissolved under low temperature conditions, stirred evenly, and a certain amount of flame retardant and A cross-linking agent forms a hydrogel, and finally obtains a flame-retardant gas gel through freeze-drying. The preparation method of waste textile aerogel can provide a new way to solve the reuse of solid waste, and the prepared gas retardant gas gel has excellent performance, which promotes the application of waste textile aerogel in heat insulation and flame retardant materials.
Description
technical field [0001] The invention belongs to the field of reuse of waste textiles, and in particular relates to a process for preparing gas-retarding gas gel by using waste textiles. Background technique [0002] With the steady growth of textile consumption, a large amount of waste textiles are produced, especially in the 21st century, the problem of waste textile disposal is becoming more and more serious. Generally, waste disposal is mainly landfill or incineration. These treatment methods not only cause environmental pollution, but also result in the waste of valuable resources. Today, when environmental protection and green development are advocated all over the world, research on the recycling of waste textiles has great value potential both in the sustainable development of the chemical economy and in the high value-added utilization of solid waste. Therefore, recycling waste textiles to produce high value-added products is an attractive and feasible environmenta...
Claims
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IPC IPC(8): C08J9/28C08L1/02C08K3/38
CPCC08J9/0066C08J9/28C08J2201/0484C08J2301/02
Inventor 郭荣辉熊简银
Owner SICHUAN UNIV