Defibrillating cellulose through various grinding steps and incorporating it into hydrogels introduces unique properties that warrant thorough exploration. This study investigates cellulose defibrillation at different steps (15-120) using an ultra-fine friction grinder, blended with high-molecular-weight polyvinyl alcohol (PVA), and crosslinked via freeze-thawing. A critical discovery is the influence of defibrillation on the hydrogel structure, as evidenced by reduced crystallinity, thermal degradation, and the enhanced swelling of PVA chains. Despite an increased elastic modulus of up to 120 steps, the synthesized material maintains remarkable strength under hydrated conditions, holding significant promise in biomaterial applications.
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http://dx.doi.org/10.3390/gels10030212 | DOI Listing |
Molecules
November 2024
Green Chemistry Centre of Excellence, Department of Chemistry, University of York, York YO10 5DD, UK.
Blackcurrant pomace (BCP) is an example of an annual, high-volume, under-utilized renewable resource with potential to generate chemicals, materials and bioenergy within the context of a zero-waste biorefinery. Herein, the microwave-assisted isolation, characterization and potential application of defibrillated lignocelluloses from depectinated blackcurrant pomace are reported. Depectination was achieved using citric acid (0.
View Article and Find Full Text PDFCarbohydr Polym
January 2025
International Centre for Bamboo and Rattan, Beijing 100102, China; Key Laboratory of National Forestry and Grassland Administration, Beijing for Bamboo & Rattan Science and Technology, Beijing 100102, China. Electronic address:
Molecules
October 2024
Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva 12, 1000 Ljubljana, Slovenia.
Cellulose produced by bacteria (BC) is considered a promising material for the textile industry, but the fragile and sensitive nature of BC membranes limits their broad applicability. Production of all-cellulose biocomposites, in which the BC is cultivated in situ on a cotton fabric, could solve this problem, but here a new issue arises, namely poor adhesion. To overcome this challenge, cotton fabric was modified with low-pressure oxygen plasma in either afterglow, E-mode, or H-mode.
View Article and Find Full Text PDFWaste Manag
December 2024
431 Dan Allen Dr., Department of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695-8005, USA. Electronic address:
The production of micro- and nano-fibrillated cellulose (MNFC) from paper mill sludge (PS) using simple enzymatic and mechanical treatments has been evaluated for their performance as value-added materials in packaging and other applications. Sludge from a US paper mill was analyzed for the viability of this conversion process. The enzymatic treatment was conducted at variable concentrations using an enzyme cocktail of exoglucanase and endoglucanase, followed by mechanical dual asymmetric centrifugation (DAC) treatment.
View Article and Find Full Text PDFPolymers (Basel)
August 2024
Department of Agriculture, Faculty of Environmental Sciences, King Abdulaziz University (KAU), P.O. Box 80208, Jeddah 21589, Saudi Arabia.
Alpha-cellulose, a unique, natural, and essential polymer for the fiber industry, was isolated in an ecofriendly manner using eleven novel systems comprising recycling, defibrillation, and delignification of prosenchyma cells (vessels and fibers) of ten lignocellulosic resources. Seven hardwood species were selected, namely , , , , , , and . Moreover, three recycled cellulosic wastes were chosen due to their high levels of accumulation annually in the fibrous wastes of Saudi Arabia, namely recycled writing papers (RWPs), recycled newspapers (RNPs), and recycled cardboard (RC).
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