Gelatin/BaTiO3核壳复合粒子的制备及电场响应性能研究

doi:10.15541/jim20160144

摘要/Abstract

摘要：

以平均粒径为0.7~0.9 mm的明胶(Gelatin)微球为基核, 通过定向沉积自组装法成功制备了以Gelatin为核、BaTiO₃为壳的Gelatin/BaTiO₃核壳复合粒子。利用TEM、XRD、FT-IR、TG和光学接触角测量等技术对复合粒子的形貌、结构、组成及表面亲水性能进行了研究。结果表明, 复合粒子为球形微粒, 具有良好的表面亲水性和分散稳定性, BaTiO₃壳层约占粒子总质量的18.8%, 具有立方相晶相结构。将粒子分散到水凝胶弹性体中, 测量在有/无电场作用下得到的弹性体的储能模量, 借以考察复合粒子在弹性体中的电场响应性能, 发现Gelatin/BaTiO₃复合粒子的电场响应性能明显强于纯BaTiO₃粒子。说明将BaTiO₃包覆在聚合物上能显著提高BaTiO₃粒子的电场响应性能。

关键词: 核壳复合粒子, Gelatin/BaTiO3, 电场响应

Abstract:

The Gelatin/BaTiO₃core-shell composite particles were prepared by directional sedimentary self-assembly on the gelatin microspheres with an average particle size about 0.7-0.9 mm. Morphology, structure, composition, and surface hydrophile of the particle were characterized by TEM, XRD, FT-IR, TG, and optical contact angle measuring instrument. The results show that the composite particles are spherical with hydrophilic surface and good dispersion, of which cubic BaTiO₃ shell accounts for about 18.8% of the total weight. After BaTiO₃ and Gelatin/BaTiO₃ particles being dispersed into gelatin hydrous elastomers cured with/without an electric field, the difference of storage modulus of the elastomers suggests that Gelatin/BaTiO₃ composite particles have stronger electro response than pure BaTiO₃ particles. These data demonstrate that coating polymer with BaTiO₃significantly can improve BaTiO₃ particles electro response.

Key words: core-shell composite particles, Gelatin/BaTiO3, electro response

中图分类号:

TB333

杨晓磊, 卢亚平, 高玫香, 谢遵园, 高玲香. Gelatin/BaTiO₃核壳复合粒子的制备及电场响应性能研究[J]. 无机材料学报, 2016, 31(12): 1306-1310.

YANG Xiao-Lei, LU Ya-Ping, GAO Mei-Xiang, XIE Zun-Yuan, GAO Ling-Xiang. Preparation and Electro Response of Gelatin/BaTiO₃ Core-shell Composite Particles[J]. Journal of Inorganic Materials, 2016, 31(12): 1306-1310.

图/表 6

图1 微球 Gelatin (a)、BaTiO3 (b)和Gelatin/BaTiO3 (c)的TEM照片

Fig. 1 TEM images of microspheres Gelatin (a), BaTiO3 (b) and Gelatin/BaTiO3 (c)

图2 BaTiO3 / Gelatin/BaTiO3和Gelatin颗粒的XRD图谱

Fig. 2 XRD patterns of BaTiO3 , Gelatin/BaTiO3 and Gelatin particles

图3 Gelatin和Gelatin/BaTiO3粒子的红外光谱图

Fig. 3 FT-IR spectra of Gelatin and Gelatin/BaTiO3 particles

图4 Gelatin/BaTiO3复合粒子的TG曲线

Fig. 4 TG curves of Gelatin/BaTiO3 composite particles

图5 BaTiO3和Gelatin/BaTiO3粒子在水中的分散情况

Fig. 5 Photographs of BaTiO3 and Gelatin/BaTiO3 particles dispersed in water, which settled for 5 min (a) and 3 h (b)

图6 含BaTiO3 (a)、Gelatin/BaTiO3 (b)复合粒子弹性体的储能模量与频率的关系图

Fig. 6 The storage modulus/frequency curves of elastomers with a a': BaTiO3; b b': Gelatin/BaTiO3 composite particles^a, b: A-elastomers ; a', b : B-elastomers

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Gelatin/BaTiO₃核壳复合粒子的制备及电场响应性能研究

Preparation and Electro Response of Gelatin/BaTiO₃ Core-shell Composite Particles

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