title: Preparation of pure chitosan film using ternary solvents and its super absorbency.
abstract: Chemical modification and graft copolymerization were commonly adopted to prepare super absorbent materials. However, physical microstructure of pure chitosan film was optimized to improve the water uptake capacity in this study. Chitosan films with micro-nanostructure were prepared by a ternary solvent system. The optimal process parameters are 1% acetic acid water solution: dioxane: dimethyl sulfoxide=90: 2.5: 7.5 (v/v/v) with chitosan concentration at 1.25% (w/v). The water uptake capacity of the chitosan film prepared under the optimal process parameters was 896g/g. The prepared chitosan films also exhibited high water uptake capacity in response to external stimuli such as temperature, pH and salt. This finding may provide another way for improving the water absorbency. The pure chitosan film may find potential applications especially in the fields of hygienic products and biomedicine due to its super water absorbency and nontoxicity.
authors: College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, PR China; Institute of Polymer Science, Qingdao University, Qingdao, 266071, PR China. Electronic address: wangxjlt@aliyun.com.
authors: Xuejun
authors: X
authors: Wang
authors: College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, PR China; Institute of Polymer Science, Qingdao University, Qingdao, 266071, PR China. Electronic address: taolou72@aliyun.com.
authors: Tao
authors: T
authors: Lou
authors: College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, PR China.
authors: Wenhua
authors: W
authors: Zhao
authors: Institute of Polymer Science, Qingdao University, Qingdao, 266071, PR China.
authors: Guojun
authors: G
authors: Song
mesh_terms: D065966:Absorption, Physicochemical; D019342:Acetic Acid / Q000737:chemistry; D000704:Analysis of Variance; D048271:Chitosan / Q000737:chemistry*; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004146:Dioxanes / Q000737:chemistry; D006801:Humans; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D058105:Polymerization; D012492:Salts; D012997:Solvents / Q000737:chemistry*; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D004146:Dioxanes; D012492:Salts; D012997:Solvents; D014867:Water; D048271:Chitosan; C025223:1,4-dioxane; D019342:Acetic Acid; D004121:Dimethyl Sulfoxide
keywords: Acetic acid (PubChem CID: 176); Chitosan; Chitosan (PubChem CID: 71853); Dioxane (PubChem CID: 31275); Microstructure; Ternary solvents; Water uptake capacity; dimethyl sulfoxide (PubChem CID: 679)