Microcrystalline cellulose-nanometer silicon dioxide hybrid material and preparing method and application thereof

Abstract

The invention relates to the field of microcrystalline cellulose hybrid nanometer materials and discloses a microcrystalline cellulose-nanometer silicon dioxide hybrid material and a preparing method and application thereof. According to the method, through adopting a micro-reactor technology in combination with a sol-gel technology, a catalyst NaOH needed by a sol-gel reaction is introduced into micro-reactors formed on the surface and in the interior of microcrystalline cellulose, and the sol-gel reaction is catalyzed. The adopted preparation technology of the microcrystalline cellulose-nanometer silicon dioxide hybrid material is simple and mild, and pollution to environment is small. Dispersity of the microcrystalline cellulose-nanometer silicon dioxide hybrid material prepared through the preparing method in a rubber matrix can be improved remarkably, and the reinforcement efficiency can be brought into full play. The finished microcrystalline cellulose-nanometer silicon dioxide hybrid material product partially or totally replaces white carbon black in tire tread rubber, themogenesis of the tread rubber can be reduced remarkably, and rolling resistance is reduced while wet skid resistance of the tread rubber is improved.

Description

Technical field [0001] The invention relates to the field of microcrystalline cellulose hybrid nano materials, in particular to a microcrystalline cellulose-nano silicon dioxide hybrid material, a preparation method and application thereof. Background technique [0002] Microcrystalline cellulose (MCC) has high strength and modulus, and is a potential reinforcing filler. Compared with glass fiber, white carbon black and carbon black, microcrystalline cellulose as a reinforcing filler has the advantages of low price, low density, easy availability, low wear on processing machinery, recyclability and biodegradability. As a resource-rich, renewable, degradable, and inexpensive green filler, if it can be applied to the reinforcement of rubber materials, it will inject new ideas into the development of low-cost, high-performance, and degradable rubber-based composite materials. vitality. [0003] However, the current application of MCC to rubber reinforcement still has the following p...

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Problems solved by technology

[0003] However, there are still the following problems in the application of MCC to rubber reinforcement at present: (1) MCC has a large particle size, generally 20-90um, and as a filler, the reinforcing effect is very poor; Polar rubber matrix has poor compatibility and low interaction strength

(3) Nano-microcrystalline cellulose (NCC) can be prepared by further acidolysis of MCC. NCC has a nanoscale and high reinforcement, but the preparation process of NCC is complicated, the cost is high, and NCC is easy to agglomerate. In the rubber matrix hard to disperse

[0004] In order to solve the above problems, inspired by the concept of "alloy", the inventor combined nano-silicon dioxide with different scales, shapes, and structures with MCC to prepare a hybrid material integrating light weight and toughness. A nano-heterostructure filler is used in the preparation of tire tread rubber, but in the process of preparing hybrid materials, we found that using the catalyst NaOH to catalyze the sol-gel reaction cannot ensure that all sol-gel products are hybridized On microcrystalline cellulose, and the fact is that most of the sol-gel products are not loaded on microcrystalline cellulose, and are eventually wasted, and the inorganic particles hybridized on MCC are not nanoscale

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