微波辅助仿生矿化增强石墨烯与聚乳酸的界面相互作用  

Microwave-assisted Biomineralization of Graphene to Enhance the Interfacial Interactions with Poly(lactic acid)

作　　者：唐梦珂 江亮 徐文轩 张子林 唐道远 黄东辉 杨皓然 高杰峰 吉祥 王延庆[1] 徐欢 TANG Mengke;JIANG Liang;XU Wenxuan;ZHANG Zilin;TANG Daoyuan;HUANG Donghui;YANG Haoran;GAO Jiefeng;JI Xiang;WANG Yanqing;XU Huan(School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,China;Anhui Sentai WPC Group Share Co.,Ltd.,Guangde 242299,China;Henan Key Laboratory of Surface and Interface Science and Technology,School of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China;School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225200,China)

机构地区：[1]中国矿业大学材料与物理学院,徐州221116 [2]安徽森泰木塑集团股份有限公司,广德242299 [3]郑州轻工业大学材料与化学工程学院,河南省表界面科学重点实验室,郑州450002 [4]扬州大学化学化工学院,扬州225200

出　　处：《高等学校化学学报》2023年第4期212-220,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:52003292,51803192);江苏省自然科学基金(批准号:BK20200661);中国博士后科学基金(批准号:2020M681763);材料复合新技术国家重点实验室(武汉理工大学)开放基金(批准号:2022-KF-33);江苏省博士后科研资助计划(批准号:2021K578C);中央高校基本科研业务费专项资金(批准号:2020ZDPYMS36,2021QN1115)资助。

摘　　要：石墨烯纳米片在提高聚乳酸(PLA)复合材料力学性能和气体阻隔性能等方面具有良好的应用前景,但通常在不同程度上受限于较差的界面相互作用.本文通过高效且环境友好的微波辅助水相仿生矿化方法,在石墨烯纳米片表面直接生成高结晶度、高结构规整度的羟基磷灰石纳米晶须,获得了具有良好分散性和界面结合力的仿生矿化石墨烯(BMGr)纳米杂化体.将BMGr纳米杂化体均匀分布于聚乳酸纤维表面,通过受限成型(60℃,3 MPa)获得了具有强界面结合的复合薄膜,大幅提高了力学性能.值得强调的是,BMGr增强聚乳酸复合薄膜的拉伸强度、杨氏模量和拉伸韧性分别达到22.6 MPa,199 MPa和6.6 MJ/m3,是纯PLA纤维膜的6.46,3.75和8.25倍.本文不仅发展了有效修饰石墨烯纳米片的技术路线,更为制备高强度高韧性的聚乳酸复合材料并阐述其结构-性能关系提供了研究思路.Graphene nanosheets have shown great application promise in promoting the mechanical performance and gas barrier properties for poly(lactic acid)(PLA),which was dwarfed by the relatively poor interfacial interactions.Using the microwave-assisted aqueous biomineralization approach,this work disclosed a high-efficiency and eco⁃friendly route to direct decoration of graphene nanosheets with well-crystallized and high-uniformity hydroxyapatite nanowhiskers,yielding the biomineralized graphene(BMGr)nanohybrids with favorable dispersibility and strong interfacial adhesion.The BMGr nanohybrids were homogeneously exfoliated and adhered onto the PLA microfibers,followed by the confined processing at 60℃and 3 MPa for fabrication of strong and tough PLA composite films with extensive interfacial interactions.It is worth noting that the tensile strength,Young’s modulus and tensile toughness of BMGr-reinforced PLA achieved 22.6 MPa,199 MPa and 6.6 MJ/m3,which were 6.46,3.75 and 8.25 times of those of pure PLA,respectively.This work is of important significance for effective decoration and surface modification of 2D nanosheets,as well as industrially viable fabrication of mechanically robust biodegradable nanocomposites.

关 键 词：聚乳酸 石墨烯 仿生矿化 界面相互作用 力学性能 

分 类 号：O631[理学—高分子化学]