摘要
采用化学氧化还原法和超声分散制备出石墨烯(GN),采用X射线衍射仪、红外光谱和原子力显微镜对所得石墨烯进行了分析和表征。结果表明,氧化石墨烯被较好地还原为石墨烯并且成功分散为纳米级厚度;采用溶液超声共混法制备石墨烯/硅丙乳液复合材料。对复合材料成膜进行扫描电镜表征、热重分析、导电渗流测试、力学性能以及耐水、耐腐蚀性测试,发现复合材料具有较低的渗滤阈值(质量分数0.5%),石墨烯用量大于0.9%时,体积电阻率基本稳定在103Ω·cm以下,导电性有了明显提高;石墨烯的用量为0.7%时,与硅丙乳液相比,复合材料拉伸强度提高了15.5%,断裂伸长率下降了3.6%,耐水性提高了14%,失重5%时的热分解温度提高了43℃,耐腐蚀性能也得到了极大提高。
Graphene( GN) and silicone-acrylate emulsion composites were prepared by joining graphene solution which was obtained by chemical reduction-oxidation and ultrasonic dispersion into acrylic emulsion. The graphene was characterized by XRD,AFM and IR and the composite films were characterized by SEM,TG,electrical conductivity,anti-corrosion performance test,mechanics performance and water resistance test. The results show that the graphene obtained from graphene oxide by reduction reaction is better and was successfully dispersed with nanoscale thickness. The composites exhibit excellent electrical properties with a percolation threshold as low as 0. 5% and a stable volume resistance below 103Ω·cm when the graphene content is more than 0. 9%. In addition,when the additive amount of GN reached 0. 7%,compared with silicone acrylate emulsion,the tensile strength of the composite materials increases by15. 5%,the elongation at break decreases by 3. 6% and the decomposition temperature increases nearly 43 ℃,the performance of resistance to water increases by 14% and corrosion resistance is greatly improved.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第8期144-149,共6页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(21276152)
关键词
石墨烯
硅丙乳液
热分解温度
力学性能
耐水性
导电性
graphene
silicone acrylate emulsion
decomposition temperature
mechanics performance
water resistance
electrical conductivity
