环氧化大豆油增韧PBAT/竹粉复合材料的制备与性能影响  

Preparation and Properties of PBAT/Bamboo Flour Composites Toughened by Epoxidized Soybean Oil

作　　者：周庆伟 陈雪梅[1] 杨景辉[1] ZHOU Qing-wei;CHEN Xue-mei;YANG Jing-hui(College of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化工学院,上海200237

出　　处：《塑料科技》2023年第1期31-35,共5页Plastics Science and Technology

摘　　要：利用双螺杆挤出机,使用熔融共混法,制备聚己二酸-对苯二甲酸丁二醇酯/竹粉(PBAT/BF)复合材料,利用环氧化大豆油(ESO)中环氧基团与PBAT/BF中羟基的化学反应,对复合材料进行增韧。采用傅里叶变换红外光谱仪(FTIR)、电子万能试验机、扫描电子显微镜(SEM)对PBAT/BF复合材料进行测试。结果表明:ESO的加入使PBAT/BF的韧性及断裂伸长率均有提升,但拉伸强度有所下降,同时两相分散效果也进一步改善。当ESO添加量为20%,复合材料的韧性最佳,与增韧前相比,冲击强度从12.06 kJ/m^(2)提高至19.56 kJ/m^(2),增加62.19%;断裂伸长率由25.63%增至348.99%。当ESO添加量为20%,ESO的环氧基团与BF表面羟基等极性基团作用,能够有效改善BF和PBAT之间的相容性,使PBAT/BF断面的微观结构平整、均匀,改善BF在聚合物中的分散效果。当ESO添加量为20%,PBAT/BF的吸水率达到最大值为0.825%,较未添加ESO提高15.06%。Poly(butylene adipate-co-terephthalate)/bamboo flour(PBAT/BF)composites were prepared by melt blending using a twin-screw extruder.The chemical reaction between epoxy groups of epoxidized soybean oil(ESO)and hydroxyl groups of PBAT/BF was used to toughen the composites.The PBAT/BF composites were tested by Fourier transform infrared spectrometer(FTIR),electronic universal testing machine and scanning electron microscope(SEM).The results show that the addition of ESO improves the toughness and elongation at break of PBAT/BF,but the tensile strength decreases,and the two-phase dispersion effect is further improved.When the addition amount of ESO is 20%,the toughness of composite is the best.Compared with that before toughening,the impact strength increases from 12.06 kJ/m^(2)to 19.56 kJ/m^(2),with an increase of 62.19%.The elongation at break increases from 25.63%to 348.99%.When the addition amount of ESO is 20%,the epoxy group of ESO interacts with polar groups such as hydroxyl groups on the surface of BF,which can effectively improve the compatibility between BF and PBAT,make the microstructure of PBAT/BF section smooth and uniform,and improve the dispersion effect of BF in polymer.When the addition amount of ESO is 20%,the water absorption of PBAT/BF reaches a maximum of 0.825%,which is 15.06%higher than that without ESO.

关 键 词：竹粉 PBAT 环氧化大豆油 熔融共混 增容改性 

分 类 号：TB332[一般工业技术—材料科学与工程]