Poly(vinylidene fluoride)/cellulose nanocrystals composites: rheological, hydrophilicity, thermal and mechanical properties

Abstract

Cellulose nanocrystals (CNCs) were used to improve the performance of poly(vinylidene fluoride) (PVDF), and the composite properties were characterized. The results showed that the prepared nanocomposites displayed the increases in mechanical properties. In particular, with the incorporation of 6 wt% CNCs, increases in tensile strength and dynamic storage modulus were observed. For hydrophilicity, the water contact angle decreased from 90°to 77°with the incorporation of only 3 wt% CNCs, indicating improved hydrophilicity. Addition of CNCs to PVDF also helped improve its thermal stability and crystallinity. It was suggested that CNCs played a nucleating role in the crystallization of PVDF, which was supported by the smaller size of PVDF spherulite observed from scanning electron microscopy analysis. Rheological results indicated that incorporation of CNCs also increased both melt storage modulus and shear viscosity of composites. Overall, our present work demonstrates that CNCs can provide PVDF with simultaneously improved properties.

Electrospun Poly(Ethylene Oxide) Fibers Reinforced with Poly (Vinylpyrrolidone) Polymer and Cellulose Nanocrystals

“…The CNCs were extracted from the cellulose powder provided by Nippon Paper Chemicals Co., LTD (W-50 grade of KC Flock, Tokyo, Japan). In brief, acid hydrolysis of the wood powder with 64 wt% H 2 SO 4 followed by high-pressure homogenization was used as described in our previous paper [10]. The specific dimensions of CNCs were 149 in length and 9 nm in diameter, respectively [10].…”

“…In brief, acid hydrolysis of the wood powder with 64 wt% H 2 SO 4 followed by high-pressure homogenization was used as described in our previous paper [10]. The specific dimensions of CNCs were 149 in length and 9 nm in diameter, respectively [10]. The prepared CNC suspensions were freeze-dried to get the dry CNC materials.…”

“…Among the nano-fillers, cellulose nanocrystals (CNCs) have been considered as a competitive candidate, because of their high strength and Young's modulus [6,9]. In addition, CNCs are inherently renewable, biodegradable, and biocompatible, leading to long-term sustainability [10,11].…”

CdS impregnated cellulose nanocrystals/PVDF composite flexible and freestanding films: Impedance spectroscopic studies

“…Requirement for using PVDF films for various device technologies necessitated the incorporation of some inorganic compounds to enhance the dipole moment of PVDF significantly to increase the signal to noise ratio in the devices based on this material. Zhang et al fabricated PVDF/CNCs composites with improved mechanical and thermal property. Kim and Kee incorporated bacterial cellulose nanowhiskers in PVDF to make electro active polymer actuator by electrospinning method.…”

Water-based bentonite drilling fluids modified by novel biopolymer for minimizing fluid loss and formation damage

“…Nanocellulose as an earth abundant, biodegradable, and renewable biopolymer nanomaterial receives great attention, due to its excellent characteristics such as nanoscale dimensions, a high surface area to volume ratio, high mechanical strength/weight performance, large flexibility, and desirable colloidal properties [16][17][18][19]. Cellulose nanoparticles (CNPs) can be extracted from various cellulosic resources like wood, cotton, and chitin by mechanical treatment, acid hydrolysis, enzymatic hydrolysis, or a combination of these methods.…”