为了提高BaTiO3颗粒在含水弹性体中的电场响应能力,以粒径约为500nm的单分散球型BaTiO3颗粒为基础,采用微乳液法成功制备了BaTiO3为核、明胶(gelatin)为壳的BaTiO3/gelatin核壳复合粒子.利用TEM、XRD、FT-IR、TG和光学接触角测量等手段对粒子的组成、结构及表面亲水性能进行了表征和测量.结果表明,在立方相BaTiO3核的表面均匀包覆了1层约40～50nm的gelatin,Gelatin壳层约占粒子总重的4.0％,且粒子表面保持良好的亲水性.将粒子分散到含水胶体体系中,通过测量在无/有电场作用下胶凝得到的含水弹性体的储能模量考察了粒子在此体系中的电场响应性能,发现BaTiO3/gelatin复合粒子在明胶(或壳聚糖)水凝胶弹性体中的电场响应性能均明显强于纯BaTiO3粒子,而且在明胶水凝胶中的响应性能更强.结果说明,聚合物包覆能够明显提高BaTiO3粒子的电场响应性能,而且粒子表面与分散体系相容性越高,粒子的响应性能越好.
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