CN-122011530-A - Modified carbon black/isoprene rubber composite material with high surface charge density and preparation method and application thereof

Abstract

The invention discloses a modified carbon black/isoprene rubber composite material with high surface charge density, a preparation method and application thereof, wherein the preparation method of the modified carbon black/isoprene rubber composite material with high surface charge density comprises the steps of taking sulfur, m-phenylenediamine and vinyl monomer as raw materials to prepare amino polysulfide; mixing the amino polysulfide, conductive carbon black and isoprene rubber in an banburying way, mixing with sulfur, an accelerator and an active agent, and performing vulcanization molding to obtain the modified carbon black/isoprene rubber composite material with high surface charge density. According to the invention, the amino polysulfide is used as a modifier, and the uniform dispersion and interfacial chemical bonding of the high-conductivity carbon black in isoprene rubber are synchronously realized through a chemical grafting and in-situ enhancement mode, so that the composite material with high surface charge density and good output stability is obtained, and is used for constructing a high-performance TENG friction layer and providing core material support for a self-powered intelligent tire.

Inventors

• WU WENJIE
• CHEN XIAOKANG
• TANG ZHENGHAI
• ZHANG LIQUN
• GUO BAOCHUN
• FU QIANG
• WEI YI

Assignees

• 华南理工大学

Dates

Publication Date

20260512

Application Date

20260320

Claims (10)

1. 1. A method for preparing a modified carbon black/isoprene rubber composite material with high surface charge density, comprising the steps of: preparing amino polysulfide by taking sulfur, m-phenylenediamine and vinyl monomer as raw materials; mixing the amino polysulfide, conductive carbon black and isoprene rubber in an banburying way, mixing with sulfur, an accelerator and an active agent, and performing vulcanization molding to obtain the modified carbon black/isoprene rubber composite material with high surface charge density.
2. 2. The method of producing a modified carbon black/isoprene rubber composite material having a high surface charge density according to claim 1, wherein the vinyl monomer is one or more of styrene, cyclopentadiene, dicyclopentadiene and vinyl-toluene, and/or the conductive carbon black is high conductive carbon black 600 JD.
3. 3. The method of preparing a modified carbon black/isoprene rubber composite material having a high surface charge density according to claim 2, wherein the vinyl monomer is styrene.
4. 4. The method for producing a modified carbon black/isoprene rubber composite material having a high surface charge density according to claim 1, wherein the mass ratio of sulfur, m-phenylenediamine and vinyl monomer is 7:1:3.
5. 5. The method for preparing the modified carbon black/isoprene rubber composite material with high surface charge density according to claim 1, wherein the mass ratio of the aminopolysulfide to the conductive carbon black to the isoprene rubber is (0.3-0.8): (4.5-12): 150.
6. 6. The preparation method of the modified carbon black/isoprene rubber composite material with the high surface charge density according to claim 1, wherein the mass ratio of isoprene rubber to sulfur to accelerator to active agent is 150 (2-3): 2-4): 7-10.
7. 7. The method for producing a modified carbon black/isoprene rubber composite material having a high surface charge density according to claim 1, wherein the accelerator is accelerator CZ and/or accelerator DM.
8. 8. The method of preparing a modified carbon black/isoprene rubber composite material with high surface charge density according to claim 1, characterized in that the active agent is zinc oxide and/or stearic acid.
9. 9. The modified carbon black/isoprene rubber composite material with high surface charge density is characterized in that the raw materials comprise isoprene rubber, high-conductivity carbon black and amino polysulfide, wherein the amino polysulfide is prepared by reversely vulcanizing and copolymerizing sulfur, m-phenylenediamine and vinyl monomers.
10. 10. Use of a modified carbon black/isoprene rubber composite material with high surface charge density according to claim 9 in a friction nano-generator.

Description

Modified carbon black/isoprene rubber composite material with high surface charge density and preparation method and application thereof Technical Field The invention belongs to the technical field of friction nano generators, and particularly relates to a modified carbon black/isoprene rubber composite material with high surface charge density, and a preparation method and application thereof. Background The intelligent tire technology monitors the tire state in real time by integrating various sensors, and is a key for realizing the intelligent and safe driving of the vehicle. The self-powered sensing system converts mechanical energy in the tire rolling process into electric energy by using a friction nano generator (TENG) to supply energy to the sensor, and is an ideal scheme for solving the limitation of the traditional battery power supply. The output performance of TENG is highly dependent on the charge trapping capacity of the friction layer material, isoprene rubber becomes an ideal matrix material of the TENG friction layer for tires due to the excellent elasticity and dynamic mechanical properties, and the pure isoprene rubber has low output charge density due to weak triboelectric property, so that functional fillers such as high conductive carbon black and the like are generally required to be added to enhance the charge trapping capacity. The inventor finds that in the research process, the carbon black is introduced into the friction layer material in the prior art mainly through three modes of 1, directly blending the high-conductivity carbon black and isoprene rubber in an open mill or an internal mixer to prepare a carbon black/isoprene rubber composite material to be used as a TENG friction layer, 2, carrying out surface chemical modification on the surface of the carbon black by adopting a silane coupling agent (such as KH550 and Si 69) to carry out chemical modification, introducing polar functional groups to improve the dispersibility and interfacial binding force of the carbon black in the rubber, and 3, adding a high-dielectric-constant filler, namely adding barium titanate (BaTiO 3) and other high-dielectric-constant fillers into a rubber matrix to improve the dielectric property of the material, thereby enhancing the charge capturing capability. The technical scheme generally faces the core problems that firstly, high-conductivity carbon black serving as a functional filler is poor in dispersibility in a nonpolar Isoprene Rubber (IR) matrix, the high-conductivity carbon black is large in specific surface area and high in surface energy, direct blending is easy to agglomerate to generate micro-scale conductive agglomerates, so that the surface potential of a friction layer is unevenly distributed, local charges are easy to dissipate through a conductive path formed by the agglomerates, the charge trapping efficiency is low, the interfacial binding force of the carbon black and the rubber matrix is weak, the interface is easy to debond in the dynamic deformation process of a tire, the surface structure of the friction layer is damaged, the output performance is fast in attenuation, secondly, the modification effects of a silane coupling agent and the like are limited by the number of active groups on the surface of the carbon black (limited hydroxyl on the surface of the carbon black), the grafting rate is not high, the single-dispersion-stage dispersion of the carbon black is difficult to realize, the crosslinking reaction of the coupling agent and the rubber is difficult to accurately control, the interface reinforcing effect is limited, and thirdly, the filler with high dielectric constant can improve the dielectric constant, but the density is poor in compatibility with the rubber, the weight and hysteresis of a composite material are remarkably increased, the direct contribution to charge trapping in the friction process is limited, and the friction performance is not suitable for application to light-weight and high dynamic performance. The composite material with high charge trapping capacity and excellent dynamic stability is provided to solve the problems of uneven carbon black dispersion and weak interface combination, and is one of main ways for meeting the requirements of self-powered sensing of intelligent tires on high output and long service life of TENG friction layers. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a modified carbon black/isoprene rubber composite material with high surface charge density, a preparation method and application thereof, the invention takes amino polysulfide (ATPS) as a modifier, the high-conductivity carbon black is uniformly dispersed in isoprene rubber and is subjected to interfacial chemical bonding in a synchronous manner through chemical grafting and in-situ enhancement, so that the composite material with high surface charge density and good output stability is obtained, and is used for con