摘要
聚羟基脂肪酸酯(PHA)具有优异的力学性能、生物相容性和阻隔性能,作为一种生物降解高分子材料在包装材料、组织工程和电学等领域得到广泛应用。结晶速率慢和韧性差限制了PHA应用领域的拓展。通过熔融混合的方法制备了一系列不同聚碳酸丁二酯(PBC)含量的PHA聚合物合金。采用差示扫描量热仪、热重分析仪、万能试验机、扫描电子显微镜和接触角测量仪等表征手段重点考察了PBC含量对PHA/PBC合金结晶、热分解、力学和亲疏水等性能的影响。结果表明,PBC的加入可以提高PHA/PBC合金的结晶峰温度,少量PBC均匀分散在PHA基体中可为成核中心,PBC质量分数为10%的PHA/PBC合金具有最高的结晶度。随着PBC含量的增加,PHA/PBC合金由脆性断裂向韧性断裂转变,PBC质量分数为90%的PHA/PBC合金的断裂伸长率分别是PHA和PBC的143倍和1.6倍,主要因为三柠檬酸三丁酯(TBC)对合金的增塑作用。另外,通过改变PBC含量还可以调控PHA/PBC合金热稳定性和亲疏水性。
Polyhydroxy fatty acid esters(PHA)have excellent mechanical properties,biocompatibility and barrier properties,and are widely used as a biodegradable polymer in the fields of packaging materials,tissue engineering and electrical engineering.Slow crystallization rate and poor toughness limit the expansion of PHA applications.A series of PHA polymer alloys with different poly(butylene carbonate)(PBC)contents were prepared by melt blending method.The effects of PBC content on the crystallization,thermal decomposition,mechanics and hydrophilic properties of PHA/PBC alloy were investigated by using characterization means such as differential scanning calorimeter,thermogravimetric analyzer,universal testing machine,scanning electron microscope and contact angle measuring instrument focusing on the PHA/PBC alloy.The results show that the addition of PBC can increase the crystallization peak temperature of PHA/PBC alloy,a small amount of PBC uniformly dispersed in the PHA matrix can be the nucleation center,and the PHA/PBC alloy with 10%PBC content has the highest crystallinity.With the increasing of PBC content,the PHA/PBC alloy changes from brittle fracture to ductile fracture.The elongation at break of the PHA/PBCalloy with 90%PBC content is 143 and 1.6 times higher than that of PHA and PBC,respectively,which is mainly attributed to the plasticizing effect of tributyl tricarbonate(TBC)on the alloy.In addition,the thermal stability and hydrophobicity of PHA/PBC alloys can be modulates by changing the PBC content.
作者
苗庆
石磊
王明亮
魏东
宋晓玲
魏忠
王自庆
Miao Qing;Shi Lei;Wang Mingliang;Wei Dong;Song Xiaoling;Wei Zhong;Wang Ziqing(School of Chemistry and Chemical Engineering,Shihezi University/Key Laboratory of Green Chemical Processes,Corps,Shihezi 832000,China;Xinjiang Tianye(Group)Co.,Ltd.,Shihezi 832000,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2023年第3期28-33,共6页
Engineering Plastics Application
基金
新疆生产建设兵团区域创新引导计划项目(2022BB003)
中国博士后科学基金项目(2022MD713812)
新疆生产建设兵团南疆重点产业创新发展支撑计划项目(2021DB004)。
关键词
聚碳酸丁二酯
聚羟基脂肪酸酯
聚合物合金
结晶性能
力学性能
poly(butylene carbonate)
polyhydroxy fatty acid esters
polymer alloys
crystallization property
mechanical property
