Synthesis and Physicochemical Characteristics of Acetylated Corn Starch under Microwave Assistance

doi:10.11901/1005.3093.2013.731

Chinese Journal of Materials Research

2014, Vol. 28

Issue (4): 286-292 DOI: 10.11901/1005.3093.2013.731

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Synthesis and Physicochemical Characteristics of Acetylated Corn Starch under Microwave Assistance

Hao ZHANG^1,²,Jiankun WANG^1,^2,^**(

),Rui WANG^1,²,Yongchun DONG¹

1. School of Textiles, Tianjin Polytechnic University, Tianjin 300387
2. Key Laboratory of Advanced Textile Composites, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387

Cite this article:

Hao ZHANG,Jiankun WANG,Rui WANG,Yongchun DONG. Synthesis and Physicochemical Characteristics of Acetylated Corn Starch under Microwave Assistance. Chinese Journal of Materials Research, 2014, 28(4): 286-292.

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Abstract

Native corn starch (NCS) was acetylated by a microwave-assisted method using vinyl acetate (VAc) as an acetylating agent and potassium carbonate K₂CO₃as a catalyst. Acetylated corn starch (ACS) was characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The physicochemical properties, adhesive properties and biodegradability of ACS were systematically investigated. The results show that the physicochemical properties of ACS were improved compared with NCS: the hydration capacity raised, solubility, swelling power and paste clarity increased; the intrinsic viscosity, apparent viscosity decreased, rheological property were improved; the syneresis decreased, anti-retrogradation were enhanced. The adhesion to polyester/cotton fibers of ACS was enhanced, which compensated for the insufficient adhesion to hydrophobic fibers of native starch. BOD₅/COD_cr value of ACS was outclasses that of PVA-205.

Key words: organic polymer materials acetylated corn starch microwave irradiation physicochemical properties biodegradation

Received: 03 October 2013

Fund: *Supported by National Natural Science Foundation of China No. 20773093, and Science and Technique Development Program of Higher Education of Tianjin No. ZD200720.

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	Hao ZHANG
	Jiankun WANG
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	Yongchun DONG

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https://www.cjmr.org/EN/10.11901/1005.3093.2013.731 OR https://www.cjmr.org/EN/Y2014/V28/I4/286

Fig.1 FT-IR spectra of NCS (a) and ACS (b)

Fig.2 SEM images of NCS (a) (b) and ACS (c) (d)

Fig.3 X-ray diffraction spectra of NCS (a) and ACS (b)

Table 1 Intrinsic viscosity and apparent viscosity and NCS and ACS

Table 2 Solubility, swelling power and paste clarity of NCS and ACS

Fig.4 Retrogradation curves of NCS and ACS

Table 3 Adhesive properties of NCS, ACS and PVA-205 to polyester/cotton blended roving

Table 4 Biodegradability index of NCS, ACS and PVA-205

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