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Citation: REN Jie, TAO Lihong, GAO Jinzhang, LI Yan, LIU Hongwei, LI Yaping. Synthesis of Composite Superabsorbent of Poly(acrylic acid sodium)/Humic Acid by Using Glowdischarge Electrolysis Plasma[J]. Chinese Journal of Applied Chemistry, ;2012, 29(4): 376-382. doi: 10.3724/SP.J.1095.2012.00224 shu

Synthesis of Composite Superabsorbent of Poly(acrylic acid sodium)/Humic Acid by Using Glowdischarge Electrolysis Plasma

1.
College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China

Corresponding author: REN Jie,
Received Date: 23 May 2011
Available Online: 11 July 2011
Fund Project: 国家自然科学基金(20873101) (20873101)甘肃省自然科学基金(1010RJZA015,096RJ2A120)资助项目 (1010RJZA015,096RJ2A120)

Poly(acrylic acid sodium)/humic acid superabsorbent composite was prepared in aqueous solution by using glow-discharge electrolysis plasma.Acrylic acid and humic acid were used as raw materials and N,N-methylenebisacrylamide as crosslinking agent.The effects of absorbency were examined in detail,such as the discharge voltage,crosslinking agent,neutralization degree of acrylic acid,polymerization temperature,amounts of sodium humate and acrylic acid.The swelling rate in 0.9% sodium chloride solution and the swelling behavior in various pH value solutions were also investigated.The structure and thermal stability of the resulting products were also characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis.The results show that the discharge voltage,amount of crosslinking agent,sodium humate,acrylic acid,neutralization degree of acrylic acid,reaction temperature were 470 V,0.6%,4%,10%,60% and 70℃,respectively,under the optimal conditions.The superabsorbent has higher water absorbency,i.e.1152 g/g for distilled water and 89 g/g for 0.9% sodium chloride solution.The retention rate of the composite is about 44.3% after heating to 800℃.
- glow discharge electrolysis plasma,
- humic acid,
- acrylic acid,
- superabsorbent resin
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