Novel superabsorbent materials from bacterial cellulose

被引:22
作者
Chaiyasat, Amorn [1 ,2 ]
Jearanai, Sirinard [1 ]
Christopher, Lew P. [3 ]
Alam, Md Nur [3 ]
机构
[1] Rajamangala Univ Technol Thanyaburi, Fac Sci & Technol, Dept Chem, Thanyaburi 12110, Pathum Thani, Thailand
[2] Rajamangala Univ Technol Thanyaburi, Fac Sci & Technol, Adv Mat Design & Dev AMDD Res Unit, Thanyaburi, Pathum Thani, Thailand
[3] Lakehead Univ, Biorefining Res Inst, 1294 Balmoral St, Thunder Bay, ON P7B 5Z5, Canada
关键词
superabsorbent hydrogels; bacterial cellulose; water retention value; FRONTAL POLYMERIZATION SYNTHESIS; SWELLING BEHAVIOR; MODIFIED CARRAGEENAN; MODIFIED CHITOSAN; CROSS-LINKING; ACRYLIC-ACID; HYDROGELS; PH; POLYSACCHARIDE; WATER;
D O I
10.1002/pi.5701
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A novel process for the production of superabsorbent materials (hydrogels) from bacterial cellulose (BC) was developed. Prior to crosslinking with a water-soluble polyethylene glycol diacrylate (PEGDA), BC was first carboxymethylated and functionalized with glycidyl methacrylate. The degree of crosslinking influenced the swelling properties of the hydrogels. The use of greater amounts of PEGDA enhanced the formation of a thicker macromolecular network containing fewer capillary spaces in the crosslinked gel. The maximum water retention value of the hydrogels containing 2.5-3.5 mmol of carboxyl groups per gram of gel reached 125 g g(-1) in distilled water, and 29 g g(-1) in saline (0.9% NaCl solution). The highly porous hydrogel architecture with a pore size of 350-600 mu m created a high specific surface area. This enables rapid mass penetration in superabsorbent applications. The superabsorbent hydrogels reached 80% of their maximum water absorption capacity in 30 min. (c) 2018 Society of Chemical Industry
引用
收藏
页码:102 / 109
页数:8
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