过硫酸铵改性炭黑通过胶乳混合法补强天然橡胶胶乳

用过硫酸铵水溶液改性炭黑,制备亲水性的炭黑悬浮液。通过红外光谱仪和热失重表征改性后炭黑表面含氧基团的变化。利用激光粒度分析仪、紫外可见分光光度计观察炭黑水溶液的分散性和分散稳定性,改性前后粒径由155.7nm降到114.2 nm。采用胶乳共混法制备改性炭黑/天然橡胶胶乳复合材料的性能明显增强,拉伸强度提高14.5%,撕裂强度提高56.5%。通过扫描电镜(SEM)观察发现,改性后的炭黑在橡胶基体中粒径小且分散均匀,与基体的界面结合力增强,炭黑的补强效果得到提高。

Ammonium Persulfate Modified Carbon Black and Its Reinforcement in Natural Rubber Latex by Latex Compounding Technique

A simple method for the oxidization of carbon in water,using ammonium persulfate(APS) as an oxidant,has been developed to prepare water-dispersible carbon nanoparticles.A high performance of natural rubber latex(NRL)/modified carbon black(MCB) is prepared by latex compounding technique.The function groups presenting on the surface of the carbon were characterized by Fourier transform infrared spectrometer(FT-IR) and thermogravimetric test(TG).The volume particle size of MCB is 114.2 nm which is largely less than that of original CB,155.7 nm.Compared with original CB,the dispersion stability of MCB become better and the carbon nanoparticles are uniformly dispersed in the composites.Compared with the NRL/pristine CB composite,the tear strength and tensile strength are increased by 14.5% and 56.5%,respectively.