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A kind of modification method of nano-silica used as rubber auxiliary agent

A technology of nano-silica and rubber additives, which is applied in the field of preparation of synthetic rubber additives, can solve the problems of less reaction steps in the modification process, poor bonding between silica and rubber matrix, and silica agglomeration, etc., to achieve Low price, mild reaction conditions, and simple equipment requirements

Active Publication Date: 2017-05-10
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for modifying nano-silica used as a rubber additive. Polydopamine-modified silica is used to obtain highly dispersed modified silica. The modification process has few reaction steps and is easy to operate. Simple, the purpose of the invention is to effectively solve the problem of agglomeration of rubber additive silica and the problem of poor bonding between silica and rubber matrix

Method used

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  • A kind of modification method of nano-silica used as rubber auxiliary agent

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Effect test

Embodiment 1

[0029] 2g of nano-silica was dried under vacuum at 100°C. Add dry nano-silica and 0.1g dopamine into 100mL tris buffer solution (pH8, concentration 5mmol / L) configured, filter, wash and dry after reacting at room temperature for 2 hours to obtain polydopamine-modified Nano-silica, differential thermal analysis results show that polydopamine in the modified compound accounts for about 3%.

Embodiment 2

[0031] 2g of nano-silica was dried under vacuum at 110°C. Add dry nano-silica and 0.3g dopamine into 200mL of configured tris buffer solution (pH10.0, concentration 10mmol / L), filter, wash and dry after reacting at room temperature for 1 hour to obtain polydopamine Modified nano-silica, differential thermal analysis results show that polydopamine in the modified compound accounts for about 10%.

Embodiment 3

[0033]2g of nano-silica was dried under vacuum at 120°C. Add dry nano-silica and 0.2g dopamine to 500mL of configured barbiturate / sodium chloride buffer solution (pH7.8, concentration 6mmol / L), react at room temperature for 3 hours, filter, wash and dry to obtain poly The results of differential thermal analysis of dopamine-modified nano-silica showed that polydopamine accounted for about 6% of the modified compound.

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Abstract

A modification method of nano white carbon black used as a rubber additive. The invention provides a preparation method of highly-dispersed nano white carbon black modified by a polymer, which particularly comprises following steps: (1) adding dried nano white carbon black and dopamine in an alkaline buffer solution; and (2) performing a reaction at room temperature for 0.5-4 h, and filtering, washing and drying a reaction product to prepare the nano white carbon black modified by the dopamine, wherein the mass ratio of the nano white carbon black to the dopamine is 1:0.05-1. The preparation method is mild in reaction conditions, is simple in operation, and is free of any initiator while water is employed as a solvent so that environmental-pollution is reduced.

Description

technical field [0001] The invention relates to a preparation method of a synthetic rubber additive. Background technique [0002] Silica is a porous substance whose composition can be SiO 2 ·nH 2 O represents, where nH 2 O exists in the form of surface hydroxyl groups. It is a white, non-toxic, amorphous, porous fine powder with large internal surface area, dispersibility, light weight, high temperature resistance, non-combustibility, and good electrical insulation. Chemical Stable in nature. As an environmentally friendly additive with excellent performance, silica is mainly used in the fields of rubber products (including high-temperature vulcanized silicone rubber), textiles, papermaking, pesticides, and food additives. Although the main components of silica and glass are silica, there are large differences in the structure and physical and chemical properties of the two. Glass is a transparent solid substance that forms a continuous network structure when it is mel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L21/00C08K9/04C08K3/36
Inventor 燕鹏华梁滔胡育林赵志超王永峰邵卫翟云芳李晶徐典宏郑红兵李波吴宇赵洪国龚光碧丛日新蒋文俊
Owner PETROCHINA CO LTD