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Study on the Preparation and Properties of Cellulose Nanofiber Reinforced Soybean Protein Isolate (SPI) Transparent Composites

Author: ChenGuanFuShou
Tutor: LiuHaiQing
School: Fujian Normal University
Course: Polymer Chemistry and Physics
Keywords: Electrospinning Nanofiber Soybean protein isolate Composite Transmittance
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 90
Quote: 1
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Abstract


Cellulose nanofibers generated from electrospinning technique have been widely applied in many fields, such as in medical, filtration systems, reinforced composites, electromagnetic shielding and liquid crystal display materials.This paper describes the preparation and characterization of cellulose nanofiber reinforced soybean protein isolate composite film. This cellulose nanofibrous mats (CNM) reinforced soybean protein isolate (SPI) composites show high visible light transmittance, and enhanced mechanical strength and thermal stability.The main work of this thesis are as follows. Cellulose acetate nanofibers were firstly synthesized through electrospinning. Cellulose nanofibers were subsequently obtained after hydrolysis of cellulose acetate nanofibers(2:1, acetone/N, N-dimethylacetamide). The nanofiberous membrane was composited with soybean protein isolate. The microstructure of the fractured surface of composite films was characterized by scanning electron microscopy (SEM). Thermal Properties of composite membrane was tested by Thermo gravimetric analysis (TGA). The light transmittance, mechanical properties, swelling ratio, and density of CNM/SPI composite were also investigated in terms of CNM content in the composite films.Due to the ultrafine diameter and superhigh length-to-diameter ratio of nanofibers, large amount of cellulose nanofibers distributed in the SPI matrix to form an interpenetrating network (IPN) alike composite material. It was found that strong interfacial interactions occurred at the cellulose nanofiber/SPI interfaces.

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