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Waterproof and anti-icing fly ash/pvc composite board and its preparation method and application

A composite board and fly ash technology, applied in applications, other household appliances, flat products, etc., can solve the problems of cracking strength of composite materials, limited waterproof and anti-icing performance of composite materials, etc.

Active Publication Date: 2022-05-06
HUBEI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned composite materials have limited waterproof and anti-icing properties, and are not suitable for the field of hydrophobic and ice-repellent, and the composite materials have technical defects of cracking or strength reduction

Method used

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  • Waterproof and anti-icing fly ash/pvc composite board and its preparation method and application
  • Waterproof and anti-icing fly ash/pvc composite board and its preparation method and application
  • Waterproof and anti-icing fly ash/pvc composite board and its preparation method and application

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preparation example Construction

[0045] The invention provides a method for preparing a waterproof and anti-icing fly ash / PVC composite plate, comprising the following steps:

[0046] S1, sieve the fly ash, and then dry the sieved fly ash at 90-110°C for 15-45 minutes to obtain the dried fly ash, which is designated as fly ash I;

[0047] S2, adding the dried coal ash into a nitric acid solution with a concentration of 25 to 35 wt %, performing acidification treatment, then suction filtration, water washing and post-drying treatment to obtain acidified coal ash, which is denoted as pulverized coal Gray II;

[0048] S3, according to a predetermined mass ratio, modify the acidified fly ash with a silane coupling agent at 25-35° C. for 15-45 minutes and then dry it to obtain the fly ash modified by the silane coupling agent. It is fly ash III;

[0049] S4, mix the fly ash modified by the silane coupling agent, resin PVC, plasticizer, Ca-Zn stabilizer, and stearic acid according to the predetermined addition ra...

Embodiment 1

[0059] Embodiment 1 of the present invention provides a method for preparing a waterproof and anti-icing fly ash / PVC composite sheet, comprising the following steps:

[0060] S1, sieve the fly ash with a 180-mesh sieve, and then dry the sieved fly ash at 100°C for 30 minutes to obtain the dried fly ash, which is designated as fly ash I (such as figure 1 shown);

[0061] S2, adding the dried fly ash into a nitric acid solution with a concentration of 30wt%, performing acidification treatment, acidifying at 30°C for 30 minutes, and then performing suction filtration, washing with water and drying to obtain acidified fly ash , recorded as fly ash II (such as figure 2 shown);

[0062] S3, the acidified fly ash is modified with a silane coupling agent at 30°C for 30 minutes and then dried to obtain the fly ash modified by the silane coupling agent, which is denoted as fly ash III (such as image 3 and Figure 4 shown); wherein, the mass ratio of the acidified fly ash and the s...

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Abstract

The invention provides a waterproof and anti-icing fly ash / PVC composite plate and its preparation method and application. The preparation method uses nitric acid acidification - silane coupling agent modification - stearic acid modification three-step combined method to modify the fly ash, and then mixes the modified fly ash and resin PVC for pressing , to prepare a fly ash / PVC composite sheet with excellent hydrophobic and ice-repelling properties and mechanical properties. The preparation method can effectively utilize fly ash waste resources from a wide range of sources, and prepare it into a composite sheet for application in the field of hydrophobic and ice-repellent, with simple preparation steps, low cost, green environmental protection, and excellent hydrophobic and ice-repellent properties and mechanical properties It can improve its mechanical properties and hydrophobic and ice-repellent properties while reducing the preparation cost of pure PVC waterproof and ice-resistant sheets. The composite sheet has great application prospects in the field of hydrophobic and ice repellent.

Description

technical field [0001] The invention relates to the technical field of material preparation, in particular to a waterproof and anti-icing fly ash / PVC composite board and its preparation method and application. Background technique [0002] Fly ash refers to fine fly ash and slag collected by dust collectors after burning coal in coal-fired power plants. Usually every 2 tons of coal consumed will produce 1 ton of fly ash, which is one of the main solid wastes produced by coal-fired enterprises. As of the end of 2020, my country's fly ash output is as high as 570 million tons, but the utilization rate is only about 70%. As the stock of fly ash increases year by year, the processing pressure increases year by year. As a kind of industrial solid waste, the pollution of the environment has attracted widespread attention, and the research on its resource utilization is an effective means to alleviate the contradiction between economic development and environmental protection. A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/06C08K9/06C08K9/02C08K7/26C08K9/10C08J5/18B29D7/01
CPCC08J5/18B29D7/01C08J2327/06C08K9/06C08K9/02C08K7/26C08K9/10
Inventor 阮敏汪孝锟孙哲李志娟夏慧平吴航廖庆玲马福民冯伟于占龙陆成龙陈跃
Owner HUBEI POLYTECHNIC UNIV
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