Tailoring Highly Oriented and Micropatterned Clay/Polymer Nanocomposites by Applying an a.c. Electric Field
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- 作者：Erwan Paineau ; Ivan Dozov ; Isabelle Bihannic ; Christophe Baravian ; Marie-Eve M. Krapf ; Adrian-Marie Philippe ; St茅phan Rouzi猫re ; Laurent J. Michot ; Patrick Davidson
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2012
- 出版时间：August 22, 2012
- 年：2012
- 卷：4
- 期：8
- 页码：4296-4301
- 全文大小：281K
- 年卷期：v.4,no.8(August 22, 2012)
- ISSN：1944-8252
文摘
Clay/polymer nanocomposites have recently raised much interest because of their widespread industrial applications. Nevertheless, controlling both clay platelet exfoliation and orientation during polymerization still remains challenging. Herein, we report the elaboration of clay/polymer nanocomposite hydrogels from aqueous suspensions of natural swelling clays submitted to high-frequency a.c. electric fields. X-ray scattering experiments have confirmed the complete exfoliation of the clay sheets in the polymer matrix, even after polymerization. Moreover, polarized light microscopy shows that the clay platelets were perfectly oriented by the electric field and that this field-induced alignment was frozen in by in situ photopolymerization. This procedure allowed us to not only produce uniformly aligned samples but also pattern platelet orientation, at length scales down to 20 渭m. This straightforward and cheap nanocomposite patterning technique can be easily extended to a wide range of natural or synthetic inorganic anisotropic particles.