文献类型：期刊文献

中文题名：柠檬酸酯对木质素/聚酯基复合材料结构与性能的影响

英文题名：Effects of Citric Acid Ester on Structure and Properties of Lignin/Polyester-Based Composites

作者：司君栋[1];林锦辉[1];张琰[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2026

卷号：39

期号：2

起止页码：150

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：;北大核心:【北大核心2023】；

语种：中文

中文关键词：乙酰柠檬酸三丁酯;柠檬酸三乙酯;相容性;复合薄膜;木质素

外文关键词：acetyl tributyl citrate;triethyl citrate;compatibility;composite film;lignin

摘要：采用熔融共混法分别引入增塑剂乙酰柠檬酸三丁酯(ATBC)和柠檬酸三乙酯(TEC),解决了因木质素聚集造成的聚丁二酸丁二醇酯-对苯二甲酸丁二醇酯(PBST)/聚羟基脂肪酸酯(PHA)/木质素(Lig)三元复合体系(PPL)的界面相容性不足和力学性能降低问题。通过傅里叶变换红外光谱(FT-IR)、差示扫描量热(DSC)、扫描电子显微镜(SEM)等对复合材料进行表征。结果表明,增塑剂的添加显著改善了木质素在PBST/PHA基体中的分散性,当ATBC质量分数为1.5%时,复合材料的拉伸强度和断裂伸长率分别为13.2 MPa和1196.9%,水蒸气透过率达到6.8 g/(m^(2)·d),具有优异的水蒸气阻隔性能;当TEC质量分数为1.5%时,熔融指数(MFR)达到20.9 g/10 min。此外,改变ATBC或TEC的质量分数也可调控复合材料的土壤降解速率。
The melt blending method was used to introduce acetyl tributyl citrate(ATBC)and triethyl citrate(TEC)separately,addressing the issues of insufficient interfacial compatibility and reduced mechanical properties of the poly(butylene succinate-co-terephthalate)(PBST)/polyhydroxyalkanoate(PHA)/lignin ternary composite system caused by the aggregation of lignin.The composite materials were characterized using Fourier-transform infrared spectroscopy(FT-IR),differential scanning calorimetry(DSC),scanning electron microscopy(SEM),water vapor transmission rate(WVTR)measurement,mechanical testing,and other methods.Results showed that no new chemical bonds were formed during the melt blending process,and the addition of citrate esters slightly decreased the thermal stability of the composite materials,but significantly improved the dispersion of lignin in the PBST/PHA matrix.Compared to TEC,ATBC exhibited better dispersion effects.When the ATBC mass fraction was 1.5%,the tensile strength of the composite material reached 13.2 MPa,and the elongation at break reached 1196.9%.The surface of the material was also smoother,and the water vapor transmission rate reached 6.8 g/(m^(2)·d),demonstrating excellent water vapor barrier properties.In addition,the addition of the two citrate esters showed improved melt flowability for the composites.When the TEC mass fraction was 1.5%,the melt flow index(MFR)reached 20.9 g/10 min.Soil degradation experiments indicated that the degradation efficiency of the composite materials initially decreased and then increased with the increasing of citrate content,illustrating a regulatory effect of the citrate esters on the material degradation.In summary,the use of citrate esters for improving the compatibility of composite materials enhances their application prospects in green packaging and agricultural films.