Citation: Dong-ling Qiao, Xian-yang Bao, Hong-sheng Liu, Xing-xun Liu, Ling Chen, Long Yu, Xiao-qing Zhang, Pei Chen . Preparation of Cassava Starch-based Superabsorbent Polymer Using a Twin-roll Mixer as Reactor[J]. Chinese Journal of Polymer Science, ;2014, 32(10): 1348-1356. doi: 10.1007/s10118-014-1516-8 shu

Preparation of Cassava Starch-based Superabsorbent Polymer Using a Twin-roll Mixer as Reactor

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Centre for Polymer from Renewable Resource, ERCPSP, SCUT, Guangzhou 510640, China
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1. Centre for Polymer from Renewable Resource, ERCPSP, SCUT, Guangzhou 510640, China
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2. CSIRO, Materials Science and Engineering, Clayton, Vic 3169, Australia
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CSIRO, Materials Science and Engineering, Clayton, Vic 3169, Australia
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School of Food Science, South China Agriculture University, Guangzhou 510640, China

Received Date: 13 December 2013
Revised Date: 7 March 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 31130042, 21174043, 31301554 and 31101340).

Cassava starch-based superabsorbent polymer was successfully synthesized using a new technology that based on modification of a Haake twin-roll mixer as reactor. The cassava starch was first gelatinized then modified by grafting under external shear stress in the reactor. The torque and temperature curves as a function of time can reflect the variations in the reactor and also offer some information about the copolymerization reaction. The advantages of this system include starch modification can be carried out (1) with high starch concentration, (2) under controlled time and (3) smaller amount of sample (60 g) required. The technology provides useful guides for reactive extrusion. The starch grafted composites were characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR) and thermal gravimetric analysis (TGA). The TGA was also used for determining the percentage of grafting ratio. The results show that the cassava starch has been successfully grafted with acrylamide then crosslinked by N,N'-methylene-bisacrylamide using this reactor. The ultimate water absorbent capacity of the cassava-based superabsorbent polymer impacted by various pH values illustrated that the acid and basic solutions inhibit the ability of imbibing water. Additionally, gel properties of the cassava-based superabsorbent polymer were investigated. It can be concluded that the structure of cassava gel is stable, while the three dimensional network of cassava-based superabsorbent polymer is rigid but its structure could not resist external force effectively and everlastingly since G' was decreased with increasing amplitude.
- Graft,
- Acrylamide,
- Superabsorbent,
- Extrusion,
- Starch,
- Cassava
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  Lin Ding , Jinpeng Zhang , Junfeng Li , Daying Liu . Color Catcher: A Marvelous Encounter of Starch and Iodine. University Chemistry, 2024, 39(6): 334-341. doi: 10.3866/PKU.DXHX202311064

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