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Soy protein isolate (SPI)—based composite materials possess a variety of excellent properties including biodegradability, biocompatibility, low cost, and easy availability, which have great potential for replacing petroleum-based materials. However, the inferior mechanical properties and high moisture sensitivity severely restrict their practical applications. In this study, novel integrated ternary...
Ramie, flax, hemp, kenaf and Apocynum venetum (A. venetum) are all natural bast fibers which are composed of different content of cellulose, hemicellulose, lignin and other gum. The inherent functionality of these bast fibers is worth studying. In this study, cotton and polyester (PET) fibers were chosen as the control, UV protection and antiphotoaging ability of these bast fibers were all tested...
Highly transparent films with excellent gas barriers are very attractive materials for electronic devices. However, gas barrier properties of conventional cellulose nanofibril films tend to degrade under humid conditions. It is a great challenge to obtain nanocellulose films that simultaneously have very low gas permeability, high transparency, and high moisture and water resistance. In this study,...
In this work, we investigated conditions to deposit cellulose nanocrystal (CNC) films onto polypropylene (PP) by spin coating, and studied the adhesion, mechanical property, and oxygen permeability properties of the CNC-coated PP films. It was found that CNC films maintained proper adhesion on UV ozone-treated PP even when deformed, but cracked when bent beyond a critical radius of curvature or scratched...
Nanocomposite films consisting of cellulose nanofibrils (CNFs), magnesium hydroxide nanoplatelets (MHNPs) and regenerated cellulose were prepared via simple blending and casting processes. The CNFs were obtained from bamboo pulp by ultrasonic treatment coupled with high shear homogenization. The morphology, structure and properties of the nanocomposite films were comprehensively analyzed using various...
In this work, the carboxylate-functionalized cellulose (CFC) from waste cotton fabrics (WCF) was studied for removal of cationic dyes from aqueous solutions. Instead of using conventional process for esterifying cellulose, which uses sulfuric or perchloric acid as catalysts, and methylene chloride as solvent, a novel mechanochemical approach which requires no catalyst or solvent in the reaction mixture...
Polyvinyl alcohol (PVA)/cellulose nanocrystals (CNCs) compounds were successfully melt-processed by injection molding. During the processing, water was involved in the system as both the dispersion medium for CNCs and the plasticizer for PVA. Meanwhile, formamide was added to prevent the evaporation of water and to co-plasticize PVA. Thermal gravimetric analysis and differential scanning calorimetry...
Handsheets with in situ generated cellulose nanoparticles were made from oxidized pulp fibers prepared by 2,2,6,6-tetramethylpiperidinyl-1-oxyl-mediated oxidation of kraft fiber with sodium hypochlorite and sodium bromide. The oxidized pulp fibers were blended prior to handsheet formation for short times (1–3 min). From gravimetric analysis of the supernatant, yield of cellulose nanoparticles generated...
Mechanochemical pretreatment of hardwood cellulose was conducted by our self-designed pan-mill equipment which has an unique and smart structure and can exert strong shear forces and pressure on materials in between and break them down. The structure transformations, including particle size, powder morphology, molecular structure, crystalline structure during milling were investigated by Laser Diffraction...
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