| Ionic polymer metal composite(IPMC)is a new kind of electroative polymer composite and has broad application prospect due to its advantages of low actuating voltage,large deformation displacement,light weight,rapid reaction,and so on.However,there are still prominent deficienc ies of the existing IPMCs,such as low blocking force and short air-operation time.Moreover,the traditional two-dimensional IPMC can not meet the requirement of structural diversity in practical application.Therefore,developing three-dimens ional IPMC,have great significance to enhance its actuating performance.In view of IPMC shortcoming above,this study has improved the performance of IPMC by optimizing the membrane structure and changing the working medium,fabricating flexible stretch materials.Specific work is as follows:(1)IPMCs with thickness of 0.33 mm,0.24~0.43 mm,0.15~0.52 mm were cast,respectively.The displacement and blocking force were measured using water as the working medium.The actuating performance of IPMC with membrane thickness of 0.24~0.43 mm is the best.Under a 3.5 V,0.1 Hz sinusoidal alternating voltage,displacement and blocking force increased by 7 % and 47 %,respectively,compared glycol as the solvent of IPMC.(2)IPMC with porous membrane was prepared,and the ionic liquid([EMIm]SCN)was used as the working medium instead of water.The results indicated that using ionic liquid as the solvent increases the maximum working voltage,the existence of porous membrane provides larger migration space and improves the migration rate of ionic liquid.In addition,the air-operation time is obviously prolonged when the working medium is ionic liquid,the driving effect still maintain stable after 5 hours' acution,about 88 % of the maximum displacement..(3)Flexible stretch material with patterned electrode was fabricated.The stretching and bending action were achieved by controlling the input signal of IPMC and the actuating process of the flexible material was demonstrated. |
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