Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 4, Pages 1868-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b06158
Keywords
Poly(L-lactide); Phytic acid; Boron nitride nanosheets; Crystallization; Flame retardancy; Thermal conductivity enhancement
Categories
Funding
- Council of Scientific and Industrial Research (CSIR), Government of India
- University Grants Commission (UGC), Government of India
- Council of Scientific and Industrial Research, Government of India [CSC-0135]
- Department of Science and Technology (Government of India) [SB/S3/CE/070/2014]
Ask authors/readers for more resources
A sustainable multifunctional nanofiller (f-BNNSs) based on boron nitride nanosheets and biobased phytic acid was prepared using (gamma-aminopropyl) triethoxysilane as a coupling agent. The structure of f-BNNSs was analyzed systematically using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and elemental mapping. The influence of f-BNNSs on the crystallinity, polymorphism, crystallization kinetics, thermal stability, thermal conductivity, and flame retardant properties of poly(L-lactic acid) (PLLA) was systematically investigated. f-BNNSs show remarkable nucleating effects on the crystallization of PLLA, and the crystallization rate increases with increasing f-BNNSs loading. Upon addition of 20 wt % of f-BNNSs, the crystallization half-time of PLLA/f-BNNSs nanocomposite decreases from 12.0 to 1.0 min at 130 degrees C compared to PLLA. The presence of f-BNNSs in PLLA/f-BNNSs nanocomposites favors the formation of ordered alpha form irrespective of the loadings of f-BNNSs. Thermal stability and thermal conductivity of PLLA increased significantly due to the strong interfacial interactions between hydroxyl groups of f-BNNSs and the carboxyl groups of PLLA. The presence of phosphorus, nitrogen, silicon, and carbon elements in f-BNNSs improves the char forming capability of f-BNNSs leading to the enhancement of the flame retardancy of PLLA in PLLA/f-BNNSs nanocomposites. The limiting oxygen index (LOI) value of neat PLLA is 18.5% and it increases to 27.5% for PLLA nanocomposites containing 20 wt % of f-BNNSs. This work provides a new strategy toward the development of environmentally friendly multifunctional nanofiller for PLLA.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available