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A multifunctional cotton fabric was prepared by immobilizing bismuth oxyiodide (BiOI) nanosheets on the surface of cotton treated to briefly dissolve surface molecules with upon the low-temperature addition of NaOH and urea (cotton micro-dissolution). Immobilization was accomplished by successive adsorption and reaction (SILAR) at the temperature (~ 25 °C). The morphology, structural characteristics,...
Waterborne bio-based polymer pigments are promising environmentally friendly coloring materials. In this work, novel colored cellulose suspensions applicable for coloring, labelling and anti-counterfeiting were prepared from waste cotton fabrics. It was demonstrated that cellulose regenerated from a phosphoric acid solution of waste cotton fabrics could be conveniently colored by reacting with reactive...
Recyclable reactive dyeing of cotton fabrics was achieved in a heterogeneous non-aqueous binary solvent system. Ethyl octanoate (EO) and dimethyl sulfoxide (DMSO) were selected as exhaustion medium and solvating medium respectively. The solvents were immiscible at room temperature but formed a continuous phase upon heating and agitation, allowing for simple separation after dyeing. Sufficient swelling...
Thiol-functionalised cellulose sponges were conveniently synthesised by reacting (2,2,6,6-tetramethylpiperidin-1-yl)oxyl oxidised cellulose nanofibrils (CNF) with (3-mercaptopropyl)-trimethoxysilane (MPTMS) at room temperature. The sponges, whose structures resemble honeycombs, were systematically characterised using Fourier transform infrared spectroscopy, solid-state 13C nuclear magnetic resonance...
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...
A robust and flexible cellulose nanofiber (CNF)-supported cryogel was prepared by chemical crosslinking method using γ-glycidoxypropyltrimethoxysilane (GPTMS) and branched polyethylenimine (PEI). FT-IR, elemental analysis, EDS and solid state 13C NMR analysis revealed that the PEI had been successfully modified on cellulose via reacting with GPTMS. The obtained flexible cryogel displayed a three-dimensional...
Cellulose composite sponges with good mechanical, heat-insulating and flame retardant properties were constructed by a facile method. Simultaneous polymerization of dopamine and hydrolysis of organosilicon in the suspension of microfibrillated cellulose could provide the stiffness and flame ratardancy of the composite sponges. The hybrid sponges had low density (15.1–28.5 mg/cm3) and desirable compression...
Preparation of cellulose nanofibril (CNF)-reinforced, biodegradable polymer composites is challenging in that it’s hard to achieve good dispersion of the hydrophilic cellulose fibers in a hydrophobic polymer matrix. In this work, we developed a surfactant-free and efficient process to prepare CNF-reinforced poly (lactic acid) (PLA) composites from an aqueous dichloromethane Pickering emulsion self-emulsified...
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