ICCAS OpenIR
An ionic liquid as reaction media for radiation-induced grafting of thermosensitive poly (N-isopropylacrylamide) onto microcrystalline cellulose
Hao, Yan; Peng, Jing; Li, Jiuqiang; Zhai, Maolin; Wei, Genshuan
2009-07-19
Source PublicationCARBOHYDRATE POLYMERS
ISSN0144-8617
Volume77Issue:4Pages:779-784
AbstractThis paper reports a homogeneous modification of microcrystalline cellulose (MCC) in ionic liquids via radiation-induced grafting. Thermosensitive poly (N-isopropylacrylamide) (PNIPAAm) was successfully grafted onto MCC in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid using gamma-ray irradiation technique at room temperature. The grafting yield (GY) increased with dose up to 40 kGy, while decreased slightly with dose rate from 22 to 102 Gy/min. The results of TGA indicated that cellulose grafted PNIPAAm (cellulose-g-PNIPAAm) had higher thermal stability than that of ungrafted regenerated cellulose (reg-cellulose). The crystalline structure of original MCC was largely destroyed during the dissolution process according to the XRD profiles, and grafting PNIPAAm onto cellulose further decreased the intensity of crystallinity. SEM showed that reg-cellulose and cellulose-g-PNIPAAm films displayed dense and homogeneous morphology. Moreover, the resulting cellulose-g-PNIPAAm exhibited obvious thermal sensitivity with a lower critical solution temperature around 35 degrees C, which was observed from the swelling behavior in water at different temperatures. (C) 2009 Elsevier Ltd. All rights reserved.
KeywordRadiation-induced Grafting Ionic Liquids Homogeneous System Microcrystalline Cellulose N-isopropylacrylamide
DOI10.1016/j.carbpol.2009.02.025
Indexed BySCI
Language英语
WOS IDWOS:000267188000013
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/66230
Collection中国科学院化学研究所
Corresponding AuthorPeng, Jing
AffiliationPeking Univ, Coll Chem & Mol Engn, Dept Appl Chem, BNLMS, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Hao, Yan,Peng, Jing,Li, Jiuqiang,et al. An ionic liquid as reaction media for radiation-induced grafting of thermosensitive poly (N-isopropylacrylamide) onto microcrystalline cellulose[J]. CARBOHYDRATE POLYMERS,2009,77(4):779-784.
APA Hao, Yan,Peng, Jing,Li, Jiuqiang,Zhai, Maolin,&Wei, Genshuan.(2009).An ionic liquid as reaction media for radiation-induced grafting of thermosensitive poly (N-isopropylacrylamide) onto microcrystalline cellulose.CARBOHYDRATE POLYMERS,77(4),779-784.
MLA Hao, Yan,et al."An ionic liquid as reaction media for radiation-induced grafting of thermosensitive poly (N-isopropylacrylamide) onto microcrystalline cellulose".CARBOHYDRATE POLYMERS 77.4(2009):779-784.
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