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A novel silicon- and nitrogen-containing compound, poly[3-(5,5-cyanuricacidpropyl)-siloxane-co-trimethyl ammoniumpropyl siloxane chloride] (PCQS) was synthesized and coated onto cotton fabrics with phytic acid (PA) by layer-by-layer assembly. The treated cotton fabrics were characterized by SEM, FT-IR and EDX. The thermal property, mechanical property, flame retardancy and antibacterial property of...
Depositing anisotropic noble metal nanoparticles with high uniformity and yield on flexible substrates is the determining factor for surface enhanced Raman spectroscopy (SERS) detection. In this work, flexible, durable and sensitive SERS substrates were fabricated by in situ reduction of Ag nanoparticles on polydopamine templated cotton fabrics (CF) as catalytic hotspots to enhance the following deposition...
This report describes the synthesis of highly carboxylated cellulose nanocrystals (CNCs) from jute fiber by facile oxidation with ammonium persulfate (APS). The oxidation time effects on microstructure, surface chemistry, crystal structure, and thermal properties were investigated. Crystal-like morphology was obtained with 5.2 nm average particle diameter and 300–500 nm length, depending on the oxidation...
In this study, the effects of replacing a hydroxyl group on C-6 of cellulose by a phosphate group, as in cellulose-6-phosphate, on the aldehyde content and the reactivity of dialdehyde cellulose phosphate were explored. Cellulose-6-phosphate (1) was efficiently oxidized by using an aqueous solution of potassium periodate to obtain dialdehyde cellulose phosphate (DACP) (2). The condensation of DACP...
Refining (i.e., mechanical beating of pulp) is a common procedure that is used in paper-making to improve the mechanical properties of the final product. The improvements caused by refining are mainly attributed to increased density and to a better bonding between fibers. In this work, we study how various mechanisms that can be triggered by refining affect the tensile behavior of the sheets. Consequently,...
Cellulose triacetate (CTA) porous membranes were firstly prepared by the combined nonsolvent-thermally induced phase separation (N-TIPS) method. Dimethyl sulfone (DMSO2) and polyethylene glycol (PEG400) were respectively chosen as the TIPS solvent and additive of CTA, while water was used as the NIPS nonsolvent. Their Hansen solubility parameters were analyzed to understand the solution thermodynamics...
Development of a simple, green, and universal method for the fabrication of hydrophobic cellulosic materials is of significance for enlarging their applications. Herein, one-step gas–solid reaction for the preparation of hydrophobic cellulosic materials having any shape and size is proposed. The substance can be made hydrophobic, as it is fully exposed to the reactive organosilane vapor. Filter paper...
Cellulose Nanocrystals (CNC) have received significant attention due to their high Young’s modulus, high strength, biocompatibility, and renewability. These properties make them ideal as a reinforcement phase for polymer composites. However, typical composite processing techniques have limitation in efficiently fabricating composites with different shapes. Inspired by the emerging technology of 3D...
A new poly(acrylethyltrimethylammonium chloride) cotton with flexible long-chain cations was prepared by surface polymerization of acrylethyltrimethylammonium chloride and grafting cotton with unsaturated bonds at 50 °C for 1.5 h. A series of microstructure transformations of poly(acrylethyltrimethylammonium chloride) cotton adsorption were first observed by Fourier transform infrared spectroscopy,...
This work studied the feasibility of potassium carbonate-glycerol deep eutectic solvent (K2CO3-Gly DES) as a potential green solvent applied in lignocellulose pulping. Cellulose fibers were extracted from rice straw via novel alkaline DES pulping technique using 1:7 molar ratio of K2CO3-Gly DES. Optimum pulping parameters were determined using the one-factor-at-a-time (OFAT) method. The cellulose...
With wide use of biomass in various industries and enterprises, large amounts of biomass waste are being produced. This causes severe environmental issues and inadequate utilization of renewable resources. In this work, a sustainable and green process approach is proposed to utilize lignocellulosic biomass residues from biofuel conversion proceeding via direct mechanical treatments. The obtained nanofibers...
This paper shows that mechanical ultrafine grinding of poplar wood is an efficient pretreatment approach to enhance its reactivity during liquefaction. The microstructural features and chemical properties of biomass samples with different particle morphology were studied. In particular, we found that more cellulose and hemicellulose were exposed on the outer surface of the ultrafine powder (cellular...
Currently, sugarcane bagasse (SB) is the most abundant agricultural residue generated in Brazil. Given that hemicelluloses can reach up to 30% of SB, bioconversion of this fraction into second generation ethanol (2G) is essential for the success of biorefinery based operations. For 2G ethanol production, techniques such as immobilization process could be an interesting strategy to improve process...
The present work describes the production of novel highly hydrated cellulose microfibrils (CMFs) with unique morphology from coffee pulp waste using specific chemical treatments. The as-produced CMFs were successfully characterized and then used as an adsorbent for removal of methylene blue (MB) from concentrated aqueous solutions. Surprisingly, it was found that the novel CMFs display high water-uptake...
In the textile wet processing, pad-dyeing is a conventional and most commonly used technique for continuous processing. This technique consumes considerable amounts of water, chemical and energy. Therefore, scientists have developed the foam technique which is more sustainable than the conventional pad-dyeing. However, in order to implement the foam-dyeing in the textile industry, the key challenges...
Calotropis gigantea fiber (CGF) is obtained from the fruit of C. procera, and has waxy coating and large lumens. Owing to inherent hydrophobic–oleophilic property, CGF-based materials have been designed and developed into one kind of green oil sorbents. To facilitate its practical applications, polyether sulfone (PES) assisted shape construction of CGF was proposed here for preparing a sustainable...
It is widely accepted that the service life of transformer oil–paper insulation is determined by the aging condition of transformer cellulosic insulation. Therefore, it is rather meaningful to accurately and reliably evaluate the aging condition of transformer cellulose insulation. Existing studies have shown that activation energy can eliminate the temperature effect on the frequency dielectric spectroscopy,...
Based on Hildebrand solubility parameter (δH) theory, a novel organosolv pretreatment medium (OPM), 1-pentanol (80%, v/v)–water mixture with a δH value of 27.4 (J/cm3)−1/2, was discovered. This OPM achieved near-complete removal of non-cellulosic components (hemicellulose 96.2% and lignin 87.8%) from bamboo under mild conditions [130 °C, 20 min, 4% (w/w) H2SO4]. For the OPMs with similar δH values...
Acetylation and resin impregnation of Japanese cypress and subsequent heating of these modified cypresses were examined using an integrated analysis of solid-state NMR spectra and relaxation times. The 1H magic angle spinning NMR showed altered moisture balance after chemical and thermal modifications because of changed hydrophobicity. The 13C cross-polarization/magic angle spinning (CP-MAS) NMR spectra...
Banana fibers are an agricultural waste material with a great exploitation potential due to their cellulose-rich content. Raw banana fibers (RBF) were treated with 3-aminopropyltriethoxy silane and glycidoxypropyltrimethoxy silane to improve the inherent limitations of banana fibers, namely its poor cell adhesion. The fibers’ modification was evaluated by inverse gas chromatography (IGC). Similar...
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