氧化石墨烯改性天然胶乳的优化试验

Optimization of Natural Latex Modified by Graphene Oxide

采用氧化石墨烯对天然胶乳进行改性,通过正交试验方法探讨氧化石墨烯用量、硫化体系及硫化工艺参数对改性胶乳硫化胶膜强度性能的影响。结果表明:在试验范围内,以拉伸强度和撕裂强度为考察指标,氧化石墨烯改性天然胶乳的优化方案氧化石墨烯用量为0. 125份,硫黄用量为1份,氧化锌用量为0. 4份,促进剂PX用量为1份,硫化温度为75℃,硫化时间为1 h;优化方案验证试验的硫化胶膜拉伸强度为28. 83 MPa,撕裂强度为65 kN·m^(-1),与未添加氧化石墨烯的空白样相比分别提高了45. 83%和51. 16%,表明氧化石墨烯对天然橡胶有良好的补强效果。

Natural latex was modified by graphene oxide,and the influence of graphene oxide dosage,vulcanization system and vulcanization process parameter on the strength properties of the vulcanized rubber film was studied using orthogonal experimental design. The results showed that,in the scope of the experiment,using tensile strength and tear strength as the optimization targets,the optimal solution of graphene oxide modified natural latex was 0. 125 phr of graphene oxide,1 phr of sulfur,0. 4 phr of zinc oxide,1 phr of accelerator PX,75 ℃ curing temperature,and 1 h curing time. The tensile strength of the vulcanized film of the optimized latex was 28. 83 MPa and the tear strength was 65 kN·m-1. Compared with the blank sample without graphene oxide,the tensile strength of the vulcanized film of the optimized latex increased by 45. 83%,and the tear strength increased by 51. 16%,indicating that graphene oxide had good reinforcing effect on natural rubber.