PHB基CA-MA二元低共熔脂肪酸定形相变材料的制备  

Preparation of PHB-based CA-MA Binary Eutectic Fatty Acid Phase Change Materials

作　　者：苗扬[1] 李丽萍[1,2] 曲美洁 张秀成 MIAO Yang;LI Liping;QU Meijie;ZHANG Xiucheng(College of Science,Northeast Forestry University,Harbin 150040;College of Materials and Energy,South China Agricultural University,Guangzhou 510642)

机构地区：[1]东北林业大学理学院,哈尔滨150040 [2]华南农业大学材料与能源学院,广州510642

出　　处：《材料导报》2017年第A02期233-237,共5页Materials Reports

基　　金：国家自然科学基金(31570572);黑龙江省科技攻关重大项目(GA15A101)

摘　　要：以聚-β-羟丁酸酯(PHB)作为基体材料,癸酸-肉豆蔻酸(CA-MA)二元低共熔脂肪酸作为相变剂,利用浇注法制备了含有不同比例脂肪酸的室温相变材料。通过热循环试验、傅里叶红外光谱(FTIR)、差示扫描量热(DSC)、扫描电镜(SEM)、热重分析(TG)和动态机械分析(DMA)等方法研究了材料的综合性能。结果表明,滤纸扩散法得出PHB对CA-MA二元低共熔脂肪酸的最大包覆量为40%,此时材料的相变温度为24.65℃,相变焓值为140.26 J/g,复合材料具有很好的相变性能。添加适量的羧甲基纤维素钠(CMC)后,材料的相变温度为24.58℃,相变焓为139.74 J/g,且CMC的加入使CA-MA的热稳定性有所提高,热分解温度提高了19℃左右,同时储能模量(E')提高了5 GPa,材料的刚性提高且微观形貌分散性良好;材料经历热循环前后相变温度、相变焓值和最初热分解温度变化很小。In this paper,poly-β-hydroxybutyrate(PHB)was used as the matrix material and CA-MA binary eutectic fatty acid was screened as the phase change agent.The room temperature phase change materials containing different proportions of fatty acids were prepared by pouring method.The comprehensive properties of the composites were studied by thermal cycling test,Fourier transform infrared spectroscopy(FTIR),differential scanning calorimetry(DSC),scanning electron microscopy(SEM),thermogravimetric analysis(TG)and dynamic mechanical analysis(DMA).The maximum coating amount of PHB on CA-MA binary eutectic fatty acids was 40%by filter paper diffusion method.At this time,the phase transition temperature of the material was 24.65℃,the phase change enthalpy was 140.26 J/g,the composite had a good phase transition performance.After adding the appropriate CMC,the phase transition temperature of the material was 24.58℃,the enthalpy of transformation was 139.74 J/g,the thermal stability of CA-MA of the materion was increased by 19℃,and the storage modulus(E′)was increased by 5 GPa,the rigidity of the material was improved and the microstructure of the dispersion was good.The change of phase transition temperature,phase change enthalpy and initial thermal decomposition temperature before and after thermal cycling were very small.

关 键 词：浇注法定形 二元低共熔脂肪酸 室温 可降解相变材料 

分 类 号：TQ314.248[化学工程—高聚物工业]