Modified rice hull ash-silicone rubber composite material and preparation method thereof

Abstract

The invention discloses a modified rice hull ash-silicone rubber composite material which consists of 107 base rubber, a cross-linking agent, a chain expander, modified rice hull ash, a catalyst, a plasticizer and an adhesive, wherein the modified rice hull ash is prepared by: 1) performing acid pickling pretreatment on rice hulls before calcining; 2) calcining the pretreated rice hulls at low temperature and high temperature in sequence; and 3) grinding, grading and performing surface treatment on the calcined rice hull ash. The invention further discloses a preparation method of the composite material. The rice hull ash prepared by using the method disclosed by the invention in a modification manner can be relatively well used for preparing the modified rice hull ash-silicone rubber composite material, and moreover, the prepared composite material is low in modulus, good in elongation performance and good in self-leveling property, and can be widely used in the fields of traffic and buildings.

Description

technical field [0001] The technical field of the sealing material of the present invention specifically relates to a modified rice husk ash-silicone rubber composite material and a preparation method thereof. Background technique [0002] There is a huge amount of rice husk (more than 40 million tons per year in my country), and no suitable way of development and utilization has been found so far. It has become agricultural waste in many places and exerts great pressure on the environment. Therefore, seeking a suitable outlet for rice husk has become an increasingly urgent issue. At present, an important application of rice husk is to burn rice husk ash, which is mainly used as an admixture for concrete materials or to prepare silica. [0003] During the processing of rubber products, a certain amount of filler must be added to improve the mechanical strength of rubber products. Common fillers include calcium carbonate, white carbon black and other reinforcing fillers. S...

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Problems solved by technology

[0002] There is a huge amount of rice husk (more than 40 million tons per year in my country), and no suitable way of development and utilization has been found so far. It has become agricultural waste in many places and exerts great pressure on the environment.

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