利用石墨烯材料和聚吡咯(PPy)对聚多巴胺(PDA)修饰的棉织物进行涂层整理,制备了石墨烯/PPy涂层棉织物,并对其微观形貌、力学性能、电导率及电磁屏蔽效能进行了表征和测试。研究表明:石墨烯材料可将PDA织物的质量增重率提升0.66%～1.25%;PPy涂层可将PDA织物质量增重率增至6.55%～7.62%。使用PDA和PPy对棉织物涂层可在棉织物表面形成涂层膜,并将石墨烯材料包覆其中。同时经PPy涂层的PDA-石墨烯织物,纤维缝隙被进一步填充,表面光洁度较好。涂层棉织物的力学性能、电导率及电磁屏蔽效能与石墨烯材料相关,其中相关性最高的是氨掺杂石墨烯,最低的是还原氧化石墨烯。涂层棉织物的电导率和电磁屏蔽效能随着涂层层数的增加而增加,当涂层层数低于3层时,电导率与电磁屏蔽效能增幅较缓;涂层层数为3～9层时,电导率与电磁屏蔽效能增幅较快;涂层层数超过9层时,电导率与电磁屏蔽效能再次趋于平缓。当涂层层数为9层时,石墨烯/PPy涂层棉织物的电磁屏蔽效能为34.65dB,已具备较好的电磁屏蔽效能。
The polydopamine (PDA)-modified cotton fabric was coated with graphene and polypyrrole (PPy) to prepare graphene/PPy-coated cotton fabrics,and their microstructure,mechanical properties,electrical conductivity and electromagnetic shielding effectiveness were characterized and tested.The results showed that graphene materials increased the mass gain rate of PDA fabric by 0.66%～1.25%,while PPy coating increased the mass gain rate to 6.55%～7.62%.The coating of PDA and PPy on cotton fabric could form a coating film on the fabric surface,encapsulating the graphene material within.Simultaneously,the Ppy-coated graphene/PDA fabric exhibited further filling of fiber gaps and improved surface smoothness.The mechanical properties,electrical conductivity and electromagnetic shielding efficiency of the coated cotton fabrics were related to graphene materials,in which N-GO showed the highest correlation and RGO was the lowest.The electrical conductivity and electromagnetic shielding efficiency of the coated fabric increased with the number of layers.When the number of layers was less than 3,the amplification of the electrical conductivity and electromagnetic shielding efficiency was slow;between 3～9 layers,the amplification was faster;and when the coating exceeded 9 layers,it tended to be flat again.When the number of layers was 9 layers,the electromagnetic shielding efficiency of the graphene/PPy-coated cotton fabric reached 34.65dB,demonstrating good electromagnetic shielding efficiency.
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基金资助
江西服装学院横向项目(JFHX202521)
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