Effect of Cellulose Nanocrystal on Crystallization Behavior of Poly(3–hydroxybutyrate–co–3–hydroxyvalerate)

Abstract

The biodegradable nanocomposites of poly (3–hydroxybutyrate–co–3–hydroxyvalerate) (PHBV) with different cellulose nanocrystals (CNCs) contents were prepared by a solvent casting method. The effects of CNCs on the crystallization behavior of PHBV were studied by DSC. The DSC results showed that compared to PHBV, the melt crystallization temperature increased to 92.3 °C for the nanocomposites with 10 wt. % CNCs, which indicated that the crystallization of PHBV became easier with the addition of CNCs. Moreover, the non–isothermal crystallization kinetics study illustrated that overall crystallization rate of PHBV in the nanocomposites was faster than that of neat PHBV, which should be attributed to the strong heterogeneous nucleation of CNCs.

Polyhydroxyalkanoates (PHA)-Cellulose Based Nanobiocomposites for Food Packaging Applications

“…Percentage crystallinity decreased marginally (51% to 47%) at low CNC loading (up to 2%). As pure PHB is brittle and highly crystalline, decrease in crystallinity is important in fabrication of films from PHB (118). Results obtained from crystallization and thermal degradation studies were similar to the results reported by Ten et al and Srithep et al (111,113).…”

Mitigating the Impact of Cellulose Particles on the Performance of Biopolyester-Based Composites by Gas-Phase Esterification

“…In order to benefit from the fully biosourced and biodegradable character of cellulose, increasing interest is being given to biopolymers that are biosourced and fully biodegradable in natural conditions, i.e., polyhydroyalakanoates (PHAs). Among PHAs, poly(hydroxybutyrate- co -valerate) (PHBV) is a very promising polymer, because its easily processable and displays similar properties to common polyolefins [ 32 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ].…”