Design And Performance Study Of A Novel Intelligent Response Polymer Gel

Smart response polymer gels have been extensively studied and are widely used in life.In this paper,the preparation of temperature-sensitive intelligent conductive hydrogel and its anti-Arrhenius ionic conductivity behavior,as well as the preparation of CO₂ response oil-absorbing resin and its adsorption to oil phase and the desorption performance of adsorbed oil phase under CO₂ were studied.Temperature-responsive conductive gels have broad application prospects in the field of artificial intelligence sensors.For conductive materials,in general,the electrical conductivity of electrons decreases with increasing temperature,while the trend of ionic conductivity changes according to the Arrhenius equation or the modified Vogel-Tammann-Fulcher?VTF?equation.In this paper,a copolymer of N-isopropylamide?NIPAm?and2-acrylamido-2-methyl-1-propanesulfonate?AMPSLi,AMPSNa,AMPSK?was prepared by simple free radical polymerization,and smart polymer conductive hydrogel with temperature sensitive properties was prepared.The experimental results show that there is anti-Arrhenius ionic conductivity behavior in the phase transition temperature range of hydrogel,and the temperature of volume phase transition increases with the increase of AMPS content.For lithium ion copolymerized hydrogels,the highest temperature of volume phase transition is about 65 ^oC?with 5%AMPSLi?and the lowest volume phase transition temperature is about 35 ^oC?with 1%AMPSLi?.After the ten-time impedance cycle test of the smart hydrogel device,the difference between the high and low impedance values is stable,indicating that the device has good and stable recyclability.This type of smart hydrogel with anti-Arrhenius ionic conductivity provides some clues for on/off ion conduction in biological systems and can also provide promising intelligent foundationfor building flexible devices,wearable devices and advanced functional ion devices.On the other hand,the increasing leakage of industrial oily wastewater and non-water soluble organic solvents?such as benzene,toluene,cyclohexane,dichloromethane,etc.?has caused great harm to the environment,and we urgently need to prepare adsorbent materials for non-water solubility.The organic solvent is adsorbed and recovered for reuse.In this paper,an oil absorbing resin having a CO₂stimulating response is obtained by copolymerization of diethylaminoethyl methacrylate?DEAEMA?and styrene?St?.Its characteristics are the adsorption capacity of the St segment to the oil phase solvent,and the reversible lipophilic-hydrophilic transition of the DEAEMA segment under the action of CO₂.We measured the adsorption of toluene on the material,the responsiveness to CO₂stimulation,and the desorption of toluene under the action of CO₂,and evaluated the regeneration performance of the adsorbent.The results show that the DEAEMA/St copolymer has a certain adsorption capacity for toluene.With the increase of St content,the adsorption rate of toluene is gradually increased,and the maximum adsorption rate is 277.8%.The oil gel is formed after adsorption of toluene can desorb the adsorbed toluene under the action of CO₂ stimulation,and the desorption of the adsorbed toluene was carried out,and the maximum desorption rate was 84.8%.The regeneration of the adsorbent material was completed can only by heating.After three cycles of regeneration,the adsorption rate of the adsorbent to toluene and the desorption rate after CO₂ treatment did not change significantly,indicating that it has good reproducibility.