Effect of application rates of assistant agents on properties of nano SiO₂/NR composites

Abstract

Nano SiO₂/NR composites were prepared through blending nano SiO₂ emulsion with natural rubber latex and then concreting with acetic acid. The emulsion nano SiO₂ was prepared with Na₂SiO₃·9H₂O and hydrochloric acid under the reaction of the assistant agents. The was analyzed effect of the application rates of assistant agents such as silane coupling agent, surfactant, nucleating agent and dispersant on the properties and interface structure of the nano SiO₂/NR composites with IR, TEM, SEM, DMA was analyzed. An orthogonal test was arranged to select optimum condition. The results show that the best combination for preparing nano SiO₂/NR composites is as follows: the rate of the silane coupling agent (TESPT), the surfactant(dodecyl benzene sulfonate natrium), nucleating agent(AlCl₃) and dispersant(ethylene diamine tetraacetie acid) in the course of preparing nano SiO₂ are 15%, 2.0%, 2.5% and 0.4%, respectively. Several replications in the experiment had produced desirable nano SiO₂ products and nano SiO₂/NR composites with better properties.

Keywords

assistant agents / nano-SiO₂ / NR / composites

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