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Synthesis and swelling behavior of super-absorbent soluble starch-g-poly(AM-co-NaAMC14S) through graft copolymerization and hydrolysis

Synthesis and swelling behavior of super-absorbent soluble starch-g-poly(AM-co-NaAMC14S) through graft copolymerization and hydrolysis
Synthesis and swelling behavior of super-absorbent soluble starch-g-poly(AM-co-NaAMC14S) through graft copolymerization and hydrolysis
By introducing sodium 2-acrylamido-tetradecanesulfonate (NaAMC14S) to graft copolymerization of soluble starch and acrylamide (AM), a novel super absorbent resin (SAR) of soluble starch-g-poly(AM-co-NaAMC14S) (SR-14) was synthesized. Polymer gels were hydrolyzed with sodium hydroxide (NaOH) to convert the function group -CONH2 to -COO-. The structures and qualitative changes of the polymer gels were characterized through Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Elemental analysis and Rheometer. Results showed the polymer gels through the hydrolysis by NaOH increased the water absorbency of the final SR-14 resin from 31.71 g/g to 1183.43 g/g as the degree of hydrolysis (DH) increased from 0 % to 80 %. Drastic increases in the storage and loss modulus of SR-14 reflected the intensive molecular structural changes induced by the addition of NaAMC14S. The changes in the molecular structures of SR-14 could be attributed to hydrophobic associations among long-chain alkane. Soluble starch-g-poly(AM-co-NaAMC14S) exhibited the maximum water absorbency of 2536.77 g/g in distilled water and 92.98 g/g in 0.9 wt.% NaCl solution. In the absence of NaAMC14S, however, the water absorbency of soluble starch-g-poly(AM) decreased to 1222.27 g/g in distilled water and to 62.29 g/g in 0.9 wt.% NaCl solution. Results indicated that NaAMC14S has potential applications as a material that could enhance the water absorbency of SAR.
Soluble starch, acrylamide, hydrophobic monomers, super absorbent resin
1-8
Lan, Guihong
0ae877a8-10a5-4c24-add4-c4c9c8f0ec43
Zhang, Ming
edeebb0b-cfae-4db1-a919-4c4e5fdae724
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Qiu, Haiyan
3399d1bc-06e4-426b-afa4-973cabaf5b2a
Xue, Songsong
4772d4cc-0d62-4b6d-80bc-30e96e3ae3d9
Zhang, Tailiang
0b939c0b-a17e-4da8-b186-e69735479012
Lan, Guihong
0ae877a8-10a5-4c24-add4-c4c9c8f0ec43
Zhang, Ming
edeebb0b-cfae-4db1-a919-4c4e5fdae724
Liu, Yongqiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Qiu, Haiyan
3399d1bc-06e4-426b-afa4-973cabaf5b2a
Xue, Songsong
4772d4cc-0d62-4b6d-80bc-30e96e3ae3d9
Zhang, Tailiang
0b939c0b-a17e-4da8-b186-e69735479012

Lan, Guihong, Zhang, Ming, Liu, Yongqiang, Qiu, Haiyan, Xue, Songsong and Zhang, Tailiang (2019) Synthesis and swelling behavior of super-absorbent soluble starch-g-poly(AM-co-NaAMC14S) through graft copolymerization and hydrolysis. Starch, 1-8. (doi:10.1002/star.201800272).

Record type: Article

Abstract

By introducing sodium 2-acrylamido-tetradecanesulfonate (NaAMC14S) to graft copolymerization of soluble starch and acrylamide (AM), a novel super absorbent resin (SAR) of soluble starch-g-poly(AM-co-NaAMC14S) (SR-14) was synthesized. Polymer gels were hydrolyzed with sodium hydroxide (NaOH) to convert the function group -CONH2 to -COO-. The structures and qualitative changes of the polymer gels were characterized through Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Elemental analysis and Rheometer. Results showed the polymer gels through the hydrolysis by NaOH increased the water absorbency of the final SR-14 resin from 31.71 g/g to 1183.43 g/g as the degree of hydrolysis (DH) increased from 0 % to 80 %. Drastic increases in the storage and loss modulus of SR-14 reflected the intensive molecular structural changes induced by the addition of NaAMC14S. The changes in the molecular structures of SR-14 could be attributed to hydrophobic associations among long-chain alkane. Soluble starch-g-poly(AM-co-NaAMC14S) exhibited the maximum water absorbency of 2536.77 g/g in distilled water and 92.98 g/g in 0.9 wt.% NaCl solution. In the absence of NaAMC14S, however, the water absorbency of soluble starch-g-poly(AM) decreased to 1222.27 g/g in distilled water and to 62.29 g/g in 0.9 wt.% NaCl solution. Results indicated that NaAMC14S has potential applications as a material that could enhance the water absorbency of SAR.

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Lan et al 2019 Starch - Accepted Manuscript
Restricted to Repository staff only until 17 January 2020.
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Accepted/In Press date: 24 December 2018
e-pub ahead of print date: 17 January 2019
Keywords: Soluble starch, acrylamide, hydrophobic monomers, super absorbent resin

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Local EPrints ID: 427797
URI: https://eprints.soton.ac.uk/id/eprint/427797
PURE UUID: 0c6a744a-7138-4387-8da2-f95939f48bf1

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Date deposited: 29 Jan 2019 17:30
Last modified: 13 Mar 2019 17:37

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Contributors

Author: Guihong Lan
Author: Ming Zhang
Author: Yongqiang Liu
Author: Haiyan Qiu
Author: Songsong Xue
Author: Tailiang Zhang

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