Citation: XU Chenxi, CAO Minghan, PENG Jing, LI Jiuqiang, ZHAI Maolin. Modification of Cellulose Triacetate Membranes with Glycidyl Methacrylate via γ-Ray Initiated Controlled Grafting[J]. Chinese Journal of Applied Chemistry, ;2020, 37(3): 293-300. doi: 10.11944/j.issn.1000-0518.2020.03.190283 shu

Modification of Cellulose Triacetate Membranes with Glycidyl Methacrylate via γ-Ray Initiated Controlled Grafting

Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

Corresponding author: PENG Jing, jpeng@pku.edu.cn ZHAI Maolin, mlzhai@pku.edu.cn
Received Date: 23 October 2019
Revised Date: 19 November 2019
Accepted Date: 28 November 2019

Fund Project: the Joint Fund of the National Natural Science Foundation of China and China Academy of Engineering Physics(NSAF) U1430234Supported by the Joint Fund of the National Natural Science Foundation of China and China Academy of Engineering Physics(NSAF)(No.U1430234)

Figures(7)

Cellulose triacetate (CTA) is a kind of cellulose derivatives with high strength, and the modified CTA can be applied in the separation, adsorption and sensors, however, it is difficult to modify it by chemical initiated grafting. In this article, CTA membranes were successfully modified with poly(glycidyl methacrylate) (PGMA) by the combination of radiation-initiated grafting and the reversible addition-fragmentation chain transfer (RAFT) polymerization method. Effects of absorbed dose, concentration of GMA and amount of RAFT agent on degree of grafting were studied. The structure, morphology and surface property of the CTA membranes before and after grafting were investigated by Flourier transform infrared spectrometer (FT-IR), scanning electronic microscopy (SEM) and contact angle test. The results show that, for a higher degree of grafting and better morphology, the optimal conditions could be found at absorbed dose of 10~12 kGy, with mass fraction 30% of GMA and molar ratio 1/400 of RAFT agent and GMA. The grafted CTA membrane with the highest degree of grafting (41%) and the narrow distribution of relative molecular mass (1.33) can be obtained under suitable conditions. After grafting, the hydrophobicity of CTA membranes increases. The work provides a simple method to prepare grafted CTA with controlled structures. Compared with traditional radiation-initiated grafting, the radiation-initiated RAFT reaction conditions are easier to be controlled in RAFT-mediated grafting process, and the grafted polymer chains are better-distributed, which benefits further functionalization and practical application of modified CTA membranes.
- cellulose triacetate,
- radiation-induced grafting,
- reversible addition-fragmentation chain transfer polymerization
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