文献类型：期刊文献

中文题名：生物可降解的聚己内酯-g-木质素薄膜的制备与性能研究

英文题名：Preparation and Properties of Biodegradable Polycaprolactone Grafted Lignin Films

作者：王静雅[1];方向晨[2];白富栋[2];彭绍忠[2];张琰[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237;[2]中国石油化工股份有限公司,大连石油化工研究院,辽宁大连116041

年份：2020

卷号：46

期号：4

起止页码：472

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：国家自然科学基金(51873062);中国石油化工股份有限公司科研创新基金(217012-3)。

语种：中文

中文关键词：木质素;聚己内酯;六亚甲基二异氰酸酯;紫外屏蔽

外文关键词：lignin;polycaprolactone;hexamethylene diisocyanate;UV-shielding

摘要：采用聚己内酯(PCL)对木质素进行酯化改性,以六亚甲基二异氰酸酯(HDI)为连接剂,异辛酸亚锡为催化剂加成聚合得到改性的木质素基-聚己内酯薄膜。通过红外光谱(FT-IR)、核磁共振(NMR)、X射线衍射表征(XRD)、热重(TG)、力学性能、接触角、紫外测试和扫描电子显微镜(SEM)对材料的结构和性能进行表征,并且考察了木质素的质量分数、HDI质量分数以及PCL的分子量对薄膜性能的影响。结果表明,PCL成功接枝到了木质素上;当木质素质量分数为27.27%时,薄膜的断裂伸长率、拉伸强度和弹性模量分别达到235.09%、24.70 MPa和262.49 MPa;紫外吸收测试表明材料具有优异的紫外屏蔽性能,在紫外光区域(290~400 nm)能屏蔽100%紫外光。
The lignin-based film was obtained by addition polymerization of lignin and polycaprolactone(PCL)by using hexamethylene diisocyanate(HDI)as the linking agent and stannous isooctylate as the catalyst.The structure and properties of the materials were characterized by infrared spectroscopy(FT-IR),NMR,XRD,thermogravimetry(TG),mechanical properties,contact angle,UV test and scanning electron microscopy(SEM).The effects of lignin content,isocyanate fraction and molecular weight of PCL on the properties of the films were also investigated.The results showed that the biodegradable soft polycaprolactone was successfully introduced into the lignin.The initial degradation temperature reached at 338.10℃ with the mass fraction of lignin of 36.36%,indicating that the modification enhanced the thermal stability of lignin.The obtained film was flexible without breaking and exhibited prominent mechanical strength.The elongation at break and tensile strength of the film could reach at 1114.84%and 17.66 MPa at the mass fraction of lignin of 9.09%,respectively.With the increase of mass fraction of lignin,the mechanical properties of the film were decreased,but when the mass fraction of lignin was 27.27%,the elongation at break,tensile strength and elastic modulus of the film could still reach about 235.09%,24.70 MPa and 262.49 MPa,respectively.Furthermore,the hydrophilic properties of the film was tunable with respect to the composition which could be adjusted as on-demand during practical applications.Exceptionally,UV absorption test manifested that the films had extraordinary UV-shielding property and could block against 100%UV light in the UV region(290—400 nm).Thus,these lignin-based films have great prospect for diverse promising applications,such as agricultural fields,packaging areas and UV-shielding biomaterial fields.