聚二甲基硅氧烷/还原氧化石墨烯及酸化多壁碳纳米管织物复合材料的制备及应变传感性能

Preparation and strain sensing properties of polydimethylsiloxane/reduced graphene and acidified multi-walled carbon nanotube woven fabric composites

制备了聚二甲基硅氧烷(PDMS)/还原氧化石墨烯及酸化多壁碳纳米管织物(RGMWF)复合材料,研究了PDMS/RGMWF复合材料的导电性能和应变传感性能。结果表明,PDMS/RGMWF具有导电性能及可观的应变范围,可用作柔性传感材料。

Polydimethylsiloxane(PDMS)had the advantages of good flexibility,strong corrosion resistance and simple curing ope-ration.In addition,PDMS could keep transparent for a long time.As an elastic matrix,transparent devices with large surface area could be prepared,which were conducive to the observation of internal components and troubleshooting in time.In this study,the conductivity and strain sensing properties of reduced graphene and acidified multi-walled carbon nanotube(MWCNT)woven fabric(RGMWF)composites were investigated when PDMS was used as an elastic matrix.Reduced graphene oxide was prepared via modified Hummers method[1].24 mg reduced graphene oxide,48 mg acidified MWCNTs and 36 mL deionized water were mixed and treated by ultrasound for 1 h,and then the suspension of 2 g/L was obtained.The cleaned cotton bandage(45 mm×30 mm)was immersed in the suspension for 40 min and dried in a 60℃oven.The immersion/drying process should be cycled for 3 times.Moreover,the cotton bandage was moved to the ethanol flame(inner flame)for 15-30 s to obtain RGMWF,which was cut into 35 mm×10 mm rectangle afterwards.And then two conductive copper wires were connected onto the RGMWF by silver paste to eliminates the interfacial resistance.Subsequently,the samples were dripped with PDMS(the mass ratio of PDMS to curing agent was 10/1)and dried in a 60℃oven for 2 h.Finally,the PDMS/GMWF composites were obtained.