title: Characterisation of cellulose films regenerated from acetone/water coagulants.
abstract: A precooled aqueous solution of 7 wt% NaOH/12 wt% urea was used to dissolve cellulose up to a concentration of 2 wt%, which was then coagulated in an acetone/water mixture to regenerate cellulose film. The volume ratio of acetone to water (φ) had a dominant influence on film dimensional stability, film-forming ability, micromorphology, and mechanical strength. The film regenerated at φ=2.0 showed excellent performance in both dimensional stability and film-forming ability. Compared to that from pure acetone, the cellulose film from the acetone/water mixture with φ=2.0 was more densely interwoven, since the cellulosic fibrils formed during regeneration had pores with smaller average diameter. The alkali capsulated in the film during film formation could be released at quite a slow rate into the surrounding aqueous solution. The regenerated cellulose film with adjustable structure and properties may have potential applications in drug release and ultra filtration.
authors: Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Hongjuan
authors: H
authors: Geng
authors: Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China; Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China. Electronic address: zwyuan163@163.com.
authors: Zaiwu
authors: Z
authors: Yuan
authors: Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Qingrui
authors: Q
authors: Fan
authors: Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Xiaonan
authors: X
authors: Dai
authors: Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Yue
authors: Y
authors: Zhao
authors: Key Laboratory of Fine Chemicals in Universities of Shandong, Qilu University of Technology, Jinan 250353, China.
authors: Zhaojiang
authors: Z
authors: Wang
authors: Laboratory of Organic Chemistry, Taishan University, Taian 271021, China. Electronic address: qmh@qlu.edu.cn.
authors: Menghua
authors: M
authors: Qin
mesh_terms: D000096:Acetone / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D012972:Sodium Hydroxide / Q000737:chemistry; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013500:Surface Tension; D014867:Water / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D012996:Solutions; D014867:Water; D000096:Acetone; D012972:Sodium Hydroxide; D002482:Cellulose
keywords: Acetone; Cellulose aqueous solutions; Coagulation; Regenerated cellulose films; Slow release