功能化氮化硼纳米片对左旋聚乳酸结晶行为的影响  

Effect of Functionalized Boron Nitride Nanosheets on Crystallization Behavior of PLLA

作　　者：孔德玉 张得利 孙长久 王腾飞 胡海青[1] 郭红革[2] 赵健[1,2] KONG Deyu;ZHANG Deli;SUN Changjiu;WANG Tengfei;HU Haiqing;GUO Hongge;ZHAO Jian(Key Laboratory of Rubber-Plastics,Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,Qingdao University of Science and Technology,Qingda O266042,China;School of Printing and Packaging Engineering,Qilu University of Technology,Jinan 250353,China)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室,山东青岛266042 [2]齐鲁工业大学印刷与包装工程学院,山东济南250353

出　　处：《青岛科技大学学报（自然科学版）》2020年第1期64-73,共10页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51873096);山东省重点研发计划项目(2017GGX20132);山东省自然科学基金面上项目(ZR201807060363)

摘　　要：将羟基官能化氮化硼纳米片(OH-BNNS)与左旋聚乳酸(PLLA)共混,制备PLLA/OH-BNNS纳米复合材料,由于PLLA中羰基和OH-BNNS中羟基存在氢键相互作用,OH-BNNS良好地分散于PLLA中。通过各种技术手段研究了OH-BNNS对PLLA的熔融结晶行为,等温结晶动力学,宏观晶体形态、晶体结构的影响。发现添加OH-BNNS能有效加速PLLA的结晶,提高成核密度,导致球晶尺寸变小,结晶度增加,冷却时结晶峰更加明显,二次升温过程中冷结晶行为减弱。低OH-BNNS负载量可以增加α-晶的相对含量,但由于PLLA和OH-BNNS间强的相互作用,在高OH-BNNS负载量下,有序度较低的α′-晶的相对含量增加。In this work,hydroxyl-functionalized boron nitride nanosheet(OH-BNNS)was prepared and was blended with poly(L-lactide)(PLLA)to yield PLLA/OH-BNNS nanocomposites with excellent dispersion of OH-BNNS via the interaction of carbonyl in PLLA and hydroxyl in OH-BNNS.The effects of OH-BNNS on the crystallization and melting behaviors,isothermal crystallization kinetics,macroscopic crystal morphology and crystal structure of PLLA were studied by means of various techniques.It is found that OH-BNNS can effectively accelerate crystallization of PLLA and enhance the nucleation density,leading to a smaller spherulite size,increased crystallinity,more obvious crystallization peak upon cooling but weakened cold crystallization behavior upon heating.Low OH-BNNS loading can increase the relative content ofα-crystal,but the relative content of less perfectα′-crystal is increased at high OH-BNNS loading due to the strong interaction between PLLA and OH-BNNS.

关 键 词：氮化硼 PLLA 纳米复合材料 结晶 

分 类 号：O643.361[理学—物理化学]