Journal
POLYMERS
Volume 11, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/polym11030440
Keywords
boron nitride; poly(l-lactide); nanocomposites; crystallization
Categories
Funding
- National Natural Science Foundation of China [31571018, 21574116, 51873096]
- Natural Science Foundation of Shandong Province [ZR201807060363]
- Primary Research and Development Plan of Shandong Province [2017GGX20132]
- State Key Laboratory of Molecular Engineering of Polymers (Fudan University) [K2019-15]
- Key Laboratory of Polymer Processing Engineering(South China University of Technology), Ministry of Education [KFKT1903]
- Division of Chemical Science, Qingdao University of Science and Technology [QUSTHX201815]
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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. The addition of OH-BNNS nanofillers can effectively accelerate the crystallization of PLLA and enhance the nucleation density, leading to a smaller spherulite size, increased crystallinity, a more obvious crystallization peak upon cooling but weakened cold crystallization behavior upon heating. Low OH-BNNS loading can increase the relative content of -crystal, but the relative content of less perfect -crystal is increased at high OH-BNNS loading due to the strong interaction between PLLA and OH-BNNS.
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