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硅烷改性凹凸棒石后,采用乳液共混共凝法制备出了凹凸棒石/天然橡胶复合材料(attapulgite/natural rub-ber composites,ANRC),并对ANRC进行了表征;红外光谱分析证实凹凸棒石得到了有机化改性;ANRC的力学性能测试表明,当天然胶乳浓度适宜?改性剂用量为1.5份、改性凹凸棒石填充量为30份时,ANRC的综合性能最好,与未添加填料的纯天然硫化胶相比,ANRC的扯断强度、撕裂强度、邵尔A硬度分别提高了77.45%、100.50%、67.74%;与炭黑做填充剂制备天然橡胶复合材料,以及机械共混法制备复合材料相比,ANRC力学性能有明显提高;扫描电子显微镜分析结果显示,采用乳液共混共凝法制备的硅烷改性ANRC,结构致密,凹凸棒石填料分布均匀,分布粒度主要为纳米级,与橡胶基体相容性良好。
After the silane modified attapulgite, attapulgite / natural rub-ber composites (ANRC) were prepared by the emulsion co-coagulation method, and the ANRC was characterized. The results of Fourier transform infrared spectroscopy The mechanical properties of ANRC showed that when the concentration of natural latex was suitable, the amount of modifier was 1.5 and the content of modified attapulgite was 30, the comprehensive performance of ANRC was the best, The tensile strength, tear strength and Shore A hardness of ANRC increased by 77.45%, 100.50% and 67.74%, respectively, compared with pure natural vulcanizate without filler. Natural rubber composites were prepared with carbon black as filler, and The mechanical properties of ANRC were improved obviously by mechanical blending method. The results of scanning electron microscopy (SEM) showed that silane-modified ANRC prepared by emulsion co-coagulation method has compact structure, uniform distribution of attapulgite filler, Mainly nano-scale, good compatibility with the rubber matrix.