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We report a facile approach to tailor the wettability of ligno-cellulosic substrates via photo-induced thiol–yne click coupling. First, cellulosic surfaces were functionalized with 4-pentynoic acid to introduce terminal alkyne moieties for the subsequent photo-induced coupling in heterogeneous phase. Next, the (primed) surfaces were reacted with various thiol-containing molecules to systematically...
In consideration of the healthcare issues caused by Particulate Matter (PM) pollution, developing high-performance air-filter materials especially aiming at filtering PM2.5 has attracted great attention. In this work, we fabricated a novel air filter with spider-web-like structure based on renewable and biodegradable fibrillated cellulose fibers, and demonstrated an effective strategy for network...
A novel amphiphilic biopolymer was synthesized by incorporating hydrophobic segment cholic acid (CA) into hydrophilic segment carboxymethyl xylan (CX) through coupling agent. Structural characteristics and self-assembly behaviors of the amphiphilic conjugates in aqueous solution were investigated in detail. Results showed that the conjugates provided monodispersed self-assembled micelles in distilled...
In this paper, a MnFe2O4-Cellulose magnetic composite aerogel (MnCA) with high adsorption capacity was fabricated by in situ incorporating MnFe2O4 to regenerated cellulose hydrogel matrix, followed by CO2 supercritical drying. A green synthetic strategy was performed by using renewable cellulose materials, environmentally benign cellulose solvents and facile synthetic conditions. The results showed...
A novel piezoelectric paper based on antimony sulfoiodide (SbSI) nanowires is reported. The composite of tough sonochemically produced SbSI nanowires (with lateral dimensions 10–100 nm and length up to several micrometers) with very flexible cellulose leads to applicable, elastic material suitable to use in fabrication of, for example, piezoelectric nanogenerators. For mechanical energy harvesting,...
An injectable polysaccharide hydrogel based on cellulose acetoacetate (CAA), hydroxypropyl chitosan (HPCS), and amino-modified cellulose nanocrystals (CNC-NH2) was prepared under physiological conditions. CNC-NH2 acted as both physical and chemical cross-linker. The effects of CNC-NH2 loading on the mechanical properties, internal morphology and gelation time were investigated; the maximum storage...
As a renewable, abundant, and eco-friendly bio-based compound, phytic acid (PA) possesses high phosphorus content, which is a potential flame retardant for cellulosic fibers. Generally, PA is not efficient for cellulosic fibers due to strong acidity that results in greatly reduced strength and lack of soft hand. As proved elsewhere, the compounds with phosphorous and nitrogen was reported to be an...
We report a novel near-infrared (NIR) and visible dual emissive transparent Yb3+-nanopaper, which is produced from Yb3+-CQDs grafted oxidized nanofibrillated cellulose (Yb3+-CQDs-ONFC) using a press-controlled extrusion film-making method. The Yb3+-nanopaper exhibits excellent properties, including high transparency (90%), good flexibility, visible fluorescence and NIR phosphorescence. The morphology...
A new proton conducting material with a possible application as a membrane in fuel cells is synthesized. It is formed by nanocrystalline cellulose (NCC) doped with a different concentration of the imidazole molecules (Im) used as “dry” conducting species. The nanocomposites (NCC-Im) are obtained in the form of films. Their chemical composition, thermal properties, and the electric conductivity are...
In the present study, we pretreated coir fiber with an ionic liquid (IL), n-butylammonium acetate, to expose its cellulose fibers. The best IL pretreatment conditions were determined by central composite design using a desirability function to maximize the enzymatic hydrolysis. To collect data for this optimization, coir fiber was subjected to a pulping process with 9% (w/w) sodium hydroxide for 6 h...
In this study, plasma-initiated graft polymerization of glycidyl methacrylate (GMA) onto nonwoven cotton fabric (NCF) and its modification with ethylenediamine (EDA) was performed. To determine the optimum conditions for plasma treatment, a comprehensive analysis of different parameters such as plasma power, applied pressure, applied plasma gas, and exposure time were conducted using both air- and...
In this study, a regenerated transparent film was obtained from cellulose/ionic liquid solution. The wrinkle and the optical properties of the film were controlled by mild heat conditionings and halloysite nanotube (HNT), respectively. To remove wrinkles, pretreatment and pressed-drying processes were employed. The haze of the film was increased with the increase of HNT, whereas the diffuse transmittance...
Cotton fabrics were modified with difunctional polysiloxanes to impart biocidal and hydrophobic properties. The modification was performed in two steps, using tetraethoxysilane in the first step, and then polysiloxanes having in their structure both alkoxy groups and long-chain quaternary ammonium salts in the second step. The modified fabrics were tested for the action of a mixture of five mold species...
The production of high filler-loaded recycled papers is often affected by high values of linting and low values of strength. In the first case, the accumulation of lint particles from paper’s surface on the printing blanket affects the quality of the printed paper and the pressroom’s productivity. In the second case, increasing the use of fillers and recycling cycles lead to poor paper strength. Cellulose...
Combining surface chemical modification of cellulose to introduce positively charged trimethylammonium groups by reaction with glycidyltrimethylammonium chloride (GTMAC) allowed for direct attachment of mammalian MG-63 cells, without addition of protein modifiers, or ligands. Very small increases in the surface charge resulted in significant increases in cell attachment: at a degree of substitution...
Efficient, rapid removal of oil spills on the surface of water is technologically significant for protecting the ecological marine environment. In this work, environmentally friendly, novel, magnetic hydrophobic PVA/CNF aerogels (MHPCA) with ultralow density (13.84 kg m−3), high porosity (> 98%), magnetic responsivity and good mechanical properties were successfully prepared by vacuum freeze-drying...
Wood is still a widely used raw material in many fields and is surface-modified for diverse applications. Though a few studies reported the anti-fungal effect derived from enhanced hydrophobicity of wood surface, no report about the influence of superhydrophobic surface upon fungi is known and the comparison of anti-fungal effects between hydrophobicity and superhydrophobicity on wood surface has...
Herein, lignocellulosic nanofibrils (LCNF) suspension containing 0.1, 3.9, and 17.2 wt% lignin were utilized to fabricate films by filtration and pressing process. The stiff nature of fibrils containing lignin made them less able to conform during filtration, resulting in more uneven surface structure with higher roughness value. Lignin in the films interfered in hydrogen bonding between cellulose...
In this work, titanium dioxide (TiO2) nanoparticles were immobilized on the surface of cotton fabrics by in situ reduction on polydopamine (PDA) templates. Evidenced by the results of scanning electron microscopy/energy-dispersive X-ray analysis (SEM–EDX), Fourier transform infrared and X-ray photoelectron spectroscopy (XPS), PDA films were successfully formed on the surface of cotton fabrics as the...
Dialdehyde celluloses (DACs) with smaller nanocrystals were prepared during the oxidization of nanocrystalline cellulose (NCC) using increased NaIO4. When NCC from the hydrolysis of microcrystalline cellulose (64 wt% H2SO4, 45 °C, 1 h) was periodate oxidized at NaIO4/anhydroglucose unit mole ratio of 5 and pH 6.5 for 5 h, the product of DAC5 can easily dissolve in water at ambient temperature. It...
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