可生物降解PEG/PBS高分子相变储能材料的制备  

Preparation of biodegradable polymeric phase change materials of PEG/PBS for energy storage

作　　者：周晓明[1] 刘亚楠[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津市300457

出　　处：《合成树脂及塑料》2012年第6期54-57,共4页China Synthetic Resin and Plastics

摘　　要：以聚乙二醇(PEG)为相变物质,可生物降解脂肪族聚酯——聚丁二酸丁二酯(PBS)为骨架支撑材料,通过接枝共聚法和偶联共混法制备了PEG/PBS高分子固-固相变材料。采用红外光谱和差示扫描量热法研究了相变材料的结构和相变行为;利用偏光显微镜(PLM)观察了相变材料的结晶形态。结果表明:接枝共聚法和偶联共混法制备的相变储能材料均具有可逆的相转变特性。两种相变材料中,相变物质PEG的结晶相转变焓分别为83.9,103.2 kJ/g,结晶峰值温度分别为21.4,23.9℃;此外,在等温结晶过程中,可观察到采用两种方法制备的PEG/PBS相变材料中存在尺寸大小不均匀的混合球晶形态;同均聚物相比,球晶尺寸均变小,PBS的环带球晶形貌消失。A novel solid-solid phase change material was synthesized with polyethylene glycol （PEG） as phase change substance and biodegradable aliphatic polyester poly（butylene succinate） （PBS） as solid skeleton by graft copolymerization and coupling blending process, respectively. The structure and phase change behaviors of PEG/PBS were studied by means of infrared spectroscopy （IR） and differential scanning calorimetry（DSC）, and the crystal morphology of the phase change material was observed by polarized light microscope（PLM）.The results show that the materials for energy storage prepared by graft copolymerization or coupling blending systems possess the reversible character of phase change. In the two kinds of phase change materials, the PEG＇s crystallization enthalpy of is 83.9 kJ/g and 103.2 kJ/g, respectively, and crystallization peak temperature is 21.4 ℃ and 23.9 ℃, respectively. Spherulites with uneven sizes and morphology are observed in the two kinds of phase change materials during isothermal crystallization. Compared with PEG and PBS, the crystal sizes of the two materials become smaller and the ring-banded spherulites of PBS disappear.

关 键 词：聚乙二醇 聚丁二酸丁二酯 固-固相变 环带球晶 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]