2S-Soy Protein-Based Biopolymer as a Non-Covalent Surfactant and Its Effects on Electrical Conduction and Dielectric Relaxation of Polymer Nanocomposites
Zhuoyuan Zheng, Olaseeni Olayinka and Bin Li
Department of Mechanical Engineering Wichita State University1845 Fairmount St, Wichita, KS 67260-0133 USA
Abstract
2S-soy protein, a biopolymer extracted from soy protein isolate (2S-SPI), was studied as a non-covalent surfactant for polymer nanocomposites. This study showed that 2S-SPI effectively improved carbon nanofibers (CNFs) dispersion in poly(vinylidene fluoride). 2S-SPI surfactant had remarkable impact on both electrical conduction and dielectric relaxation of the nanocomposites, particularly, at high temperatures. 2S-SPI modified CNFs caused coupling of conductivity relaxation and structural relaxations of the nanocomposites, in contrast to pristine CNFs. Both Maxwell–Wagner–Sillars and conductivity relaxations were enhanced at high temperatures by 2S-SPI, which made different contributions to electrical conduction of the nanocomposites with or without surface modification.
Publication details
Article type:
Research Paper
Published online:
17 Oct 2018
DOI:
10.30919/es8d766
Volume:
4
Page:
87-99
Citation:
Engineered Science, 2018, 4, 87-99
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Description:
2S-soy protein is an effective non-covalent surfactant for polymer nanocomposites, leading to greatl....
2S-soy protein is an effective non-covalent surfactant for polymer nanocomposites, leading to greatly altered electrical conduction and dielectric relaxation behaviors.
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