Synthesis and characterization of biological nanomaterial/poly(vinylidene fluoride) composites

The properties of composite materials are strongly influenced by both the physical and chemical properties of their individual constituents, as well as the interactions between them. For nanocomposites, the incorporation of nano-sized dopants inside a host material matrix can lead to significant improvements in mechanical strength, toughness, thermal or electrical conductivity, etc. In this work, the effect of cellulose nanofibrils on the structure and mechanical properties of cellulose nanofibril poly(vinylidene fluoride) (PVDF) composite films was investigated. Cellulose is one of the most abundant organic polymers with superior mechanical properties and readily functionalized surfaces. Under the current processing conditions, cellulose nanofibrils, as-received and 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized, alter the crystallinity and mechanical properties of the composite films while not inducing a crystalline phase transformation on the 𝛾 phase PVDF composites. Composite films obtained from hydrated cellulose nanofibrils remain in a majority 𝛾 phase, but also exhibit a small, yet detectable fraction of 𝛼 and ß PVDF phases.

Evaluation of the Effect of Sizing Compositions on the Properties of Hydrated Cellulose Technical Yarn

The influence of sizing compositions on the reinforcing properties of hydrated cellulose technical yarns has been investigated. The optimal mode of modification of hydrated cellulose yarns has been determined. The evaluation of the structural properties of the modified yarns has been carried out. The kinetic features of the modified yarns wetting by an epoxy oligomer have been studied.

Integrated highly hydrated cellulose network with synergistic photothermal effect for efficient solar-driven water evaporation and salt resistance

Solar-driven water evaporation is an effective approach for using solar energy to purify seawater and wastewater. However, the high energy requirements of bulk water evaporation fundamentally restrict the practical application...

New highly hydrated cellulose microfibrils with a tendril helical morphology extracted from agro-waste material: application to removal of dyes from waste water

Cocoa bean shells are a by-product of the cocoa bean processing industry. Highly hydrated cellulose microfibrils with special morphology were obtained from this by-product and used as adsorbent material for waste water treatment.