Novel superabsorbent cellulose-based hydrogels crosslinked with citric acid

被引：361
|
作者：
Demitri, Christian [1 ]
Del Sole, Roberta [1 ]
Scalera, Francesca [1 ]
Sannino, Alessandro [1 ]
Vasapollo, Giuseppe [1 ]
Maffezzoli, Alfonso [1 ]
Ambrosio, Luigi [2 ]
Nicolais, Luigi [2 ]
机构：
[1] Univ Salento, Innovat Engn Dept, I-73100 Lecce, Italy
[2] Univ Naples Federico II, Dept Mat & Prod Engn, I-80125 Naples, Italy
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2008年 / 110卷 / 04期
关键词：
cellulose; crosslinking; hydrogels; FTIR;
D O I：
10.1002/app.28660
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This work is focused on the preparation of new environmentally friendly hydrogels derived from cellulose and hence originating from renewable resources and characterized by biodegradable properties. Two cellulose derivatives, sodium carboxymethylcellulose (CMCNa) and hydroxyethylcellulose (HEC), were used for superabsorbent hydrogel preparation. Citric acid (CA), a crosslinking agent able to overcome toxicity and costs associated with other crosslinking reagents, was selected in a heat activated reaction. Differential scanning calorimeter (DSC), fourier transform infrared spectroscopy (FTIR), and swelling measurements were performed during the reaction progress to investigate the CA reactivity with each of the polymers. Also, CMCNa/HEC polymer mixtures (3/1 w/w) crosslinked with CA were investigated and compared with previous results. Finally, a possible reaction mechanism was proposed. (C) 2008 Wiley Periodicals, Inc.
引用
收藏
页码：2453 / 2460
页数：8
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