In this research work, a series of thermoset polyurethane (tPU) nanocomposites and thermoplastic PU (TPPU) were synthesized using semi-crystalline polyols. Poly(?-caprolactone) (PCL), poly(tetramethylene glycol) (PTMG), different architecture compositions PCL PTMG used as diols. was to synthesize TPPU (PCL-TPPU) the control specimen. Cellulose nanowhisker (CNW), with 1.0 wt% content, for synthe...

This work demonstrates the preparation of spherical nanocellulose from microcrystalline cellulose by controlled hydrolysis using anaerobic microbial consortium. The nanocellulose formed during the degradation of microcrystalline cellulose was separated by ultra filtration membrane and purified by differential centrifugation. The purified nanocellulose was characterized by nanoparticle size anal...

The paper investigates the prosodic characteristics, including the temporal structure, F0, and intensity, of the monosyllabic number words (MNW) and compound number words (CNW), bisyllabic and trisyllabic, in Hong Kong Cantonese. Results of analysis show that (i) the rime durations of all the MNW in isolation are reduced when the MNW occur as component MNW in the CNW; (ii) not all the initial c...

Cellulose nanocrystals (CNCs), also called cellulose nanowhiskers, cellulose nanorods, or nanocrystalline cellulose, were prepared from Phyllostachys heterocycla using a commercial cellulase for hydrolysis. The enzymatic hydrolysis process and application performance as well as the biocompatibility of the CNCs were investigated. Here, the cellulase hydrolysis conditions were optimized at a cell...

Pb nanoclusters were deposited onto a suspended carbon nanowire (CNW), where in situ temperature variable observation was carried out by a transmission electron microscope. The heating temperature was up to 450 °C. Both the melting and evaporation of the Pb nanoparticles on the CNW were retarded when compared to the particles on the support frame. The obvious temperature difference of up to 10 ...

The application of cellulose nanowhiskers in polymeric composites is growing due to its good properties, which expands the applicability in the industrial sector, although many studies are still in the laboratory stage. Silva, R. et al. cites many segments for application of natural cellulosic fibers, wide applicability detaching, from textile industry to some studies for the use of fibers such...

Chitin nanowhiskers are structured into mesoporous aerogels by using the same benign process used previously in our group to make cellulose nanowhisker aerogels. The nanowhiskers are sonicated in water to form a hydrogel before solvent-exchange with ethanol and drying under supercritical CO2 (scCO2 ). Aerogels are prepared with various densities and porosities, relating directly to the initial ...

The objective of this research was to evaluate an all-chemical process to prepare nano-scale to macro-scale cellulosic fibers from kenaf bast fibers, for polymer composite reinforcement. The procedure used in this all-chemical process included alkaline retting to obtain single cellulosic retted fiber, bleaching treatment to obtain delignified bleached fiber, and acidic hydrolysis to obtain both...