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Lignin-coated cellulose nanocrystals as promising nucleating agent for poly(lactic acid)Author(s): Anju Gupta; William Simmons; Gregory T. Schueneman; Eric A. Mintz
Source: Journal of Thermal Analysis and Calorimetry
Publication Series: Scientific Journal (JRNL)
Station: Forest Products Laboratory
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DescriptionWe report the effect of lignin-coated cellulose nanocrystals (L-CNCs) on the crystallization behavior of poly(lactic acid) (PLA). PLA/L-CNC nanocomposites were prepared by melt mixing, and the crystallization behavior of PLA was investigated using differential scanning calorimetry. Isothermal crystallization data were analyzed using Avrami and Lauritzen–Hoffman secondary nucleation theory, while the equilibrium melting temperature was determined using the nonlinear Hoffman–Weeks method. The lignin-coated cellulose nanocrystals acted as a nucleating agent and significantly increased the rate of crystallization and degree of crystallinity of PLA in PLA/ L-CNC nanocomposites. The Avrami exponent, n, increased in the presence of L-CNCs, displaying a conversion from lamellar morphology to two-dimensional crystal growth. PLA/L-CNC nanocomposites also gave lower values of the nucleation parameters, Kg and re, due to a reduction in the activation energy for nucleation.
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CitationGupta, Anju; Simmons, William; Schueneman, Gregory T.; Mintz, Eric A. 2016. Lignin-coated cellulose nanocrystals as promising nucleating agent for poly(lactic acid). Journal of Thermal Analysis and Calorimetry. 9 p. DOI: 10.1007/s10973-016-5657-6.
KeywordsIsothermal crystallization, Lignin-coated cellulose nanocrystals, Secondary nucleation, Poly(lactic acid) and nanocomposites, "Isothermal crystallization, Lignin-coated cellulose nanocrystals, Secondary nucleation, Poly(lactic acid) and nanocomposites
- Crystallization kinetics and morphology of small concentrations of cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs) melt-compounded into poly(lactic acid) (PLA) with plasticizer
- Performance of high lignin content cellulose nanocrystals in poly(lactic acid)
- Rheological properties of cellulose nanocrystals engineered polylactic acid nanocomposites
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