亲疏水性可控纤维素基相变纤维的制备与性能研究  

Preparation and Performance of Hydrophobic Controllable Cellulose-based Phase Change Fibers

作　　者：韩仁阳 廖李玲 谭磊 王倩 韩梦清 王天驰 钱勇强 HAN Ren-yang;LIAO Li-ling;TAN Lei;WANG Qian;HAN Meng-qing;WANG Tian-chi;QIAN Yong-qiang(International Science and Technology Cooperation Base of“Industrial Waste Recycling and Advanced Materials”,School of Materials Science and Engineering,North Minzu University,Yinchuan 750021,China)

机构地区：[1]“工业废弃物循环利用及先进材料”国际科技合作基地北方民族大学材料科学与工程学院,银川750021

出　　处：《高分子通报》2023年第6期727-736,共10页Polymer Bulletin

基　　金：2022年区级创新训练项目(S202211407006);北方民族大学高层次人才引进培育项目(2021KYQD11)。

摘　　要：以棉花为支撑材料,丙烯酰氯(AC)作为中间体,在异相条件下制备纤维素基丙烯酸酯(CA);后利用过氧化苯甲酰(BPO)作为引发剂,通过自由基聚合法接枝疏水性丙烯酸十八酯(A18)、亲水性聚乙二醇单甲醚甲基丙烯酸酯(OEGMA)及其共聚物,制备具有亲疏水性可控的纤维素基固-固相变纤维(solid-solid phase change fibers, SSPCFs)。利用傅里叶变换红外光谱(FTIR)、差示扫描量热仪(DSC)、热重分析(TG)和X射线衍射(XRD)对SSPCFs的结构和热性能进行了表征;通过形态稳定性测试研究接枝共聚物在不同温度下的形态;最后对相变纤维进行水接触角测试研究其亲疏水可控性。结果表明:成功将A18和OEGMA接枝到纤维素表面,制备出具有一定储能特性的固-固相变材料;五种CA-g-P(A18-co-OEGMA)共聚物的耐热温度初始分解温度最低为348℃,最高为368℃,均比CA的初始分解温度高,增加了纤维素基产物的热稳定性;通过水接触角测试表面,随着OEGMA含量的增加,接枝共聚物的水接触角逐渐减小,呈现出逐渐亲水的状态。以上结果说明CA-g-P(A18-co-OEGMA)共聚物亲疏水性的可控性;同时其接枝共聚物的熔融潜热逐渐降低;相变纤维在70℃高温下仍能保持良好的形态稳定性,表明形态稳定性纤维素基SSPCFs的成功制备。The cellulose-based acrylate(CA)was prepared under heterogeneous conditions using cotton as the support material and acryloyl chloride as an intermediate;the cellulose-based solid-solid phase change fibers(solid-solid phase change fibers,SSPCFs)with controlled hydrophobicity were then grafted with hydrophobic octadecyl acrylate(A18),hydrophilic polyethylene glycol monomethyl ether methacrylate(OEGMA)and their copolymers by free radical polymerisation using benzoyl peroxide(BPO)as initiator.The structural and thermal properties of the SSPCFs were characterized by Fourier transform infrared spectroscopy(FTIR),differential scanning calorimetry(DSC),thermogravimetric analysis(TG)and X-ray diffraction(XRD);the morphology of the graft copolymers was investigated by morphological stability tests at different temperatures;finally,the hydrophobicity of the phase change fibers was investigated by water contact angle tests.The results show that:A18and OEGMA were successfully grafted onto the cellulose surface to prepare solid-solid phase change materials with certain energy storage properties;the initial decomposition temperatures of the five OEGMA copolymers were among 348-368℃,all of which were higher than the initial decomposition temperature of CA,increasing the thermal stability of the cellulose-based products;The water contact angle of the graft copolymers decreased gradually with increasing OEGMA content,showing aprogressive hydrophilic state.The controlled hydrophobicity of the CA-g-P(A18-co-OEGMA)copolymer was illustrated;at the same time the latent heat of fusion of its graft copolymer gradually decreased;the phase change fibers maintained good morphological stability at 70℃,indicating the successful preparation of morphologically stable cellulose-based SSPCFs.

关 键 词：纤维素 十八烷基丙烯酸酯 聚乙二醇单甲醚甲基丙烯酸酯 亲疏水性可控相变纤维 

分 类 号：TQ340.1[化学工程—化纤工业]