Excessive use of synthetic nondegradable polymers has led to the proliferation microplastics in oceans as well polluted landscapes. Herein, we report a new sustainable approach for development oil- and water-resistant paper. Chitosan–graft–poly(dimethylsiloxane) (CHI–g–PDMS) copolymers were prepared by reaction poly(dimethylsiloxane) (PDMS) with chitosan. The CHI–g–PDMS graft copolymer was characterized 1H nuclear magnetic resonance (NMR) analysis. Zein, coproduct bioethanol industry,...

Abstract Ultraviolet (UV) weathering performance of unpigmented and rutile titanium dioxide pigmented rigid polyvinyl chloride (PVC)/wood‐fiber composites has been studied. The composite samples were manufactured by dry‐blending PVC, wood fibers, other processing additives in a high‐intensity mixer. dry‐blended compounds extruded compression molded into panel samples. artificially weathered using laboratory accelerated UV tests. Composite exposed to 340‐nm fluorescent lamps assessed every...

Abstract Ultraviolet weathering performance of polyvinyl chloride (PVC) filled with different concentrations wood flour was studied. Extruded PVC/wood‐flour composite samples were subjected to cyclic ultraviolet lamps/condensation exposures and assessed over a total 400 2600 hours. Each assessment consisted DRIFTFTIR XPS collections, contact angle measurement, color tensile property testing. The experimental results indicated that flours are effective chromophore materials since their...

The current open-loop practices employed to render paper substrates water- and oil-repellent for packaging non-packaging applications have generated ocean pollution placed daunting burdens on landfills.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInverse gas chromatography characterization of birch wood mealDonatien Pascal Kamdem, Samar Kanti Bose, and Philip LunerCite this: Langmuir 1993, 9, 11, 3039–3044Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.1021/la00035a049https://doi.org/10.1021/la00035a049research-articleACS PublicationsRequest reuse permissionsArticle...

The X-ray photoelectron spectroscopy (XPS) study of black cherry (Prunus serotina), red oak (Quercus rubra), and pine (Pinus resinosa) wood samples extracted with ethanol, ethanol—toluene, water was conducted to evaluate chemical modifications occurring on the surface due extractives, derive possible implications for utilization. Results obtained indicate an increase in O/C values following extraction treatments partial removal high carbon content extractives. C 1s peaks indicated a decrease...

Abstract Short glass fibers were added to poly(vinyl chloride) (PVC)/wood flour composites as reinforcement agents. Unnotched and notched impact strength of PVC/wood flour/glass fiber hybrid could be increased significantly without losing flexural properties by adding type L over 40% PVC. There was no such improvement when using S fiber. The along with the increment content at a 50% PVC content. At high contents, fracture surfaces characterized wood particle, breakage pullout, whereas...

Abstract The incompatibility of hydrophilic wood fiber and hydrophobic polymers is the main difficulty with thermoplastic polymer composites. To overcome this issue, many researchers suggest grafting onto for improving interfacial adhesion during mixing. A systematic ESCA study chemi‐thermo‐mechanical pulp (CTMP) grafted has been performed to provide chemical information about surface composition modification. material analyzed included initial CTMP fiber, pure i.e., poly(methyl...

Summary The interaction of copper ethanolamine (Cu-EA) preservative and wood components was studied by using Fourier transform infrared spectroscopy (FTIR). In Cu-EA treated wood, significant reduction noticed on the band attributed to carbonyl vibration from carboxylic groups at 1735 ± 5 cm −1 an increase in intensity obtained carboxylate 1595 . same observation made holocellulose. lignin resulted a aromatic ester 1710 Bands 1370 1221 , assigned phenolic hydroxyl groups, exhibited decrease...

Heartwood is a determining factor of wood quality and understanding the biology heartwood may allow us to control its formation. formation form senescence that accompanied by variety metabolic alterations in ray parenchyma cells at sapwood—heartwood transition zone. Although has been studied molecular level with respect primary growth, cell maturation death events occurring during have difficult study because their location timing. Analysis global gene expression patterns from sapwood offer...

Abstract Extracted and unextracted black cherry ( Prunus serotina ), red oak Quercus rubra pine Pinus resinosa ) wood specimens were exposed to artificial weathering, their discoloration process was investigated obtain basic understanding on the role of extractives in weathering hardwoods softwoods. Color measurements made with a spectrometer according ISO 2470 standards, using CIELAB system. Results obtained showed that rate whiteness not significantly affected by removed organic solvents,...

Abstract Heat-treated wood is widely used for outdoor furniture manufacturing. However, it susceptible to against physical degradation such as cracking and discoloration. This study involved heat-treated at three different temperatures of 180 °C, 200 °C 220 was acetylated using vacuum-pressure impregnation methods enhance photostability, dimensional thermal stability. The laboratory chromaticity data indicated a substantial enhancement the photostability wood. color difference reduced from...

Abstract This study employed time domain nuclear magnetic resonance by using inversion recovery and Carr–Purcell–Meiboom–Gill pulse sequences to identify the relaxation properties of bound water in elm pine wood under various relative humidity levels. Results showed that sizes micropores mesopores increased with accumulation. Furthermore, sapwood were larger than those heartwood both wood. Hydroxyl (OH water) molecules tightly primary sorption sites polymers. More freely occupied void spaces...

The root bark of Sassafras albidum (Nuttall) Nees (Lauraceae) was extracted at room temperature with hexane and chloroform as solvents. isolated essential oils were analyzed GC GC/MS. Thirty compounds identified, nine which have not been previously reported from this species. major safrole (85%), camphor (3.25%), methyleugenol (1.10%). Ten sesquiterpenes also identified.