An effective way to stabilize silicon nitride nanoparticles dispersed in rubber matrix by a one-step process

作者：Tai Yanlong; Miao Jibin; Qian Jiasheng^*; Xia Ru; Zhang Yuchuan

来源：Materials Chemistry and Physics, 2008, 112(2): 659-667.

DOI：10.1016/j.matchemphys.2008.06.074

• Macromolecular coupling agent
• Surface modified
• Silicon nitride nanoparticles (Si3N4)
• Oil resistance

In this work, a new graft copolymerization macromolecular coupling agent (LMPB-g-MAH) of maleic anhydride (MAH) onto low-molecular-weight polybutadiene liquid rubber (LMPB) was synthesized, and it was used to modify silicon nitride nanciparticles (Si3N4). The structure and surface properties of modified nano-Si3N4 were systematically characterized by FTIR, TEM, XPS, size distributions analyzer, TGA, dispersion stabilization in dimethylbenzene and contact angle measurement. It can be found that the optimum graft degree (GD%) and loading of LMPB-g-MAH is 9-11% and 10-12%, respectively. According to the spectra of FTIR and XPS, it can be inferred that LMPB-g-MAH covalently bonds on the surface of nanO-Si3N4 particles and an organic coating layer was formed. The contact angle and surface free energy experiments show that the hydrophobic property of modified nanO-Si3N4 is improved. TEM reveals that modified nano-Si3N4 possesses good dispersibility and the average diameter in dimethylbenzene is less than 60 rim. TGA indicates that the using efficiency of the macromolecular coupling agent is 44.66%. The oil resistance of SBR-based nanocomposites was also studied, which was improved greatly due to the modified nano-Si3O4.

• 出版日期2008-12-1
• 单位安徽大学