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功能化氮化硼纳米片对左旋聚乳酸结晶行为的影响

作者:时间:2020-05-08点击数:

全文下载:  202001010.pdf

 

文章编号: 1672-6987(2020)01-0064-10; DOI: 10.16351/j.1672-6987.2020.01.010

 

孔德玉1, 张得利1, 孙长久1, 王腾飞1, 胡海青1, 郭红革2, 赵健1,2*

(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)

 

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。

关键词: 氮化硼; PLLA; 纳米复合材料; 结晶

 

中图分类号: O 643.36+1文献标志码: A

引用格式: 孔德玉, 张得利, 孙长久, 等. 功能化氮化硼纳米片对左旋聚乳酸结晶行为的影响\[J\]. 青岛科技大学学报(自然科学版), 2020, 41(1): 64-73.

KONG Deyu, ZHANG Deli, SUN Changjiu, et al. Effect of functionalized boron nitride nanosheets on crystallization behavior of PLLA\[J\]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2020, 41(1): 64-73.

 

Effect of Functionalized Boron Nitride Nanosheets on

Crystallization Behavior of PLLA

 

KONG Deyu1, ZHANG Deli1, SUN Changjiu1, WANG Tengfei1, HU Haiqing1, GUO Hongge2, ZHAO Jian1,2

(1.Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics,

Qingdao University of Science and Technology, Qingdao 266042, China; 2.School of Printing and Packaging Engineering,

Qilu University of Technology, Jinan 250353, China)

 

Abstract: 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 of α-crystal, but the relative content of less perfect α′-crystal is increased at high OH-BNNS loading due to the strong interaction between PLLA and OH-BNNS.

Key words: boron nitride; PLLA; nanocomposites; crystallization

 

收稿日期:  2018-11-26

基金项目: 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).

作者简介: 孔德玉(1993—),女,硕士研究生.*通信联系人.


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