基于原子转移自由基聚合（ATRP）技术的再生纤维素膜表面PGMA接枝改性研究

doi:10.11901/1005.3093.2024.345

材料研究学报 DOI: 10.11901/1005.3093.2024.345

高英,王军波,米亚策,孙俊民

内蒙古工业大学

Study on grafting modification of PGMA on the surface of regenerated cellulose membrane based on atom transfer radical polymerization ( ATRP ) technology

引用本文:

高英王军波米亚策孙俊民. 基于原子转移自由基聚合（ATRP）技术的再生纤维素膜表面PGMA接枝改性研究[J]. 材料研究学报, 10.11901/1005.3093.2024.345.

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摘要: 作为一种精细调控材料特性的先进手段，纤维素膜的可控接枝改性技术以其高度的灵活性与可定制性，正逐步成为材料科学与技术领域的研究焦点。本研究利用原子转移自由基聚合（ATRP）技术，在再生纤维素膜材表面接枝聚甲基丙烯酸缩水甘油酯（PGMA），系统地探究了多个关键参数对接枝效果的影响，包括引发剂（2-溴异丁酰溴，BIBBr）投加量、反应温度、单体（甲基丙烯酸缩水甘油酯，GMA）及催化剂（溴化亚铜，CuBr）用量，旨在可控引入环氧基团，为下游分离纯化做铺垫。研究结果表明：BIBBr的用量直接关联于表面接枝引发剂的密度，进而可实现GMA接枝率的有效调控。在优化条件下，即以3倍于羟基当量的BIBBr作为引发剂，GMA用量设定为17.83mmol，CuBr用量为0.18mmol，并在60℃下进行反应时，实现了高达10.51wt%的接枝率及12.63μmol/g的环氧值。该研究为实现纤维素膜的功能化设计提供了重要的实验依据和理论指导。

关键词 ：再生纤维素膜, 原子转移自由基聚合（ATRP）, 聚甲基丙烯酸缩水甘油酯（PGMA）, 环氧基团

Abstract：As an advanced method for finely regulating the properties of materials, the controllable grafting modification technology of cellulose membrane is gradually becoming the research focus in the field of material science and technology due to its high flexibility and customization. In this study, atom transfer radical polymerization (ATRP) technology was used to graft poly (glycidyl methacrylate) (PGMA) on the surface of regenerated cellulose membrane. The effects of several key parameters on the grafting effect were systematically investigated, including initiator (2-bromoisobutyryl bromide, BIBBr) dosage, reaction temperature, monomer (glycidyl methacrylate, GMA) and catalyst (cuprous bromide, CuBr) dosage. The aim is to introduce epoxy groups in a controllable manner and pave the way for downstream separation and purification. The results show that the amount of BIBBr is directly related to the density of the surface grafting initiator, which can effectively control the grafting rate of GMA. Under the optimized conditions, i.e., using BIBBr with a hydroxyl equivalent of 3 times as the initiator, the amount of GMA was set to 17.83mmol, the amount of CuBr was set to 0.18mmol, and the reaction was carried out at 60°C. The grafting rate was up to 10.51wt% and the epoxy value was 12.63μmol/g. This study provides an important experimental basis and theoretical guidance for the functional design of cellulose membranes.

Key words： Regenerated cellulose membrane, Atom transfer radical polymerization, Poly (glycidyl methacrylate), Epoxy group

收稿日期: 2024-08-15

基金资助:内蒙古自治区直属高校基本科研业务费

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	高英
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