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首先将β-环糊精(β-CD)和聚乙烯醇(PVA)用戊二醛交联制成凝胶;然后以浓硫酸作为改性剂,将磺酸根引入凝胶中,制备出一种阴离子型磺化β-CD/PVA凝胶,并对该凝胶的平衡溶胀率、粘接性能和电刺激响应行为等进行了研究。结果表明:该凝胶在Na2SO4水溶液中的平衡溶胀率随离子强度增加而减小;其剪切强度随PVA含量增加呈先升后降态势,并且在w(PVA)=5%时相对最大(3.8 MPa)。在非接触性直流电场作用下,该凝胶在Na2SO4水溶液中弯向电场负极,其弯曲偏转速率和应变随外加电压增加而增大,并且在离子强度为0.15 mol/L时相对最大;在循环电场作用下,该凝胶的电刺激响应行为具有良好的重现性和可逆性。
Firstly, β-cyclodextrin (β-CD) and polyvinyl alcohol (PVA) were crosslinked with glutaraldehyde to form a gel; then, with concentrated sulfuric acid as a modifier, sulfonate was introduced into the gel to prepare a An anionic sulfonated β-CD / PVA gel was prepared. The equilibrium swelling rate, adhesive property and electrical stimulation response of the gel were studied. The results showed that the equilibrium swelling rate of the gel in Na2SO4 aqueous solution decreased with the increase of ionic strength. The shear strength of the gel first increased and then decreased with the increase of PVA content, and the relative maximum at (PVA) = 5% 3.8 MPa). Under non-contact DC electric field, the gel bent toward the negative pole of the electric field in Na2SO4 aqueous solution, the bending deflection rate and strain increase with the increase of applied voltage, and the relative maximum is at the ionic strength of 0.15 mol / L; Under the action of electric field, the electrical stimulation response of the gel has good reproducibility and reversibility.