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将天然胶乳(NRL)、氧化石墨烯(GO)分散液与SiO_2悬浮液三种液体通过机械搅拌充分混合,在高压气相雾化作用下,混合液先被打散成微小液滴,形成一次破碎;该液滴后经高温金属板表面溅射爆破,形成二次破碎,达到分散效果,然后液滴被瞬间脱水干燥获得GO-SiO_2/天然橡胶(NR)母胶。GO与SiO_2在雾化、溅射和爆破作用下,在NR中达到微观分散效果。结果表明,与普通絮凝湿法混炼工艺相比,雾化溅射干燥工艺可以使GO和SiO_2在NR基体中更均匀地分散。Payne效应结果表明:雾化溅射工艺减弱了GO片层、SiO_2间的相互作用。雾化溅射干燥工艺制备的GO-SiO_2/NR硫化胶的拉伸强度提高了13.6%,撕裂强度提高了31.5%,耐磨性能提高了16.7%;动态力学性能结果表明,用该工艺制备的GO-SiO_2/NR复合材料在60℃左右损耗因子更低。
The natural latex (NRL), graphene oxide (GO) dispersion and the suspension of SiO 2 three liquids by mechanical mixing thoroughly mixed, high-pressure gas phase atomization, the mixture was first broken into tiny droplets, forming a broken ; The droplet was blast-blasted by the surface of a high-temperature metal plate to form secondary crushing to achieve dispersion effect, and then the droplet was instant dehydrated and dried to obtain a GO-SiO 2 / natural rubber (NR) masterbatch. GO and SiO 2 in the atomization, sputtering and blasting in the NR to achieve micro-dispersion effect. The results show that compared with ordinary flocculation wet-mixing process, atomization and sputtering drying process can make GO and SiO 2 disperse more evenly in NR matrix. The results of Payne effect show that the atomization sputtering process weakens the interaction between GO and SiO2. The tensile strength of GO-SiO_2 / NR vulcanizates prepared by atomization and sputtering drying process increased by 13.6%, the tear strength increased by 31.5% and the wear resistance increased by 16.7%. The results of dynamic mechanical properties showed that the prepared GO-SiO_2 / Of GO-SiO 2 / NR composites at 60 ℃ loss factor is lower.