Fabrication and characterization of chemical crosslinked cellulose fiber by dissolving cellulose in alkali urea aqueous solvent

Abstract

Sustainable materials fabricated from natural polymers have attracted much attentions because of their multiple advantages like abundant renewable resource, biocompatibility, biodegradability, and nontoxicity, while their actually application often restricted by mechanical properties. Chemical crosslinking method was usually used to improve the mechanical properties of cellulose materials such as hydrogel, film, aerogel, and so forth. Here, cellulose fibers were fabricated from cellulose solution in alkali/urea aqueous solvent by chemical crosslinking with epichlorohydrin in a PVC hose. The chemical crosslinked cellulose fibers exhibited smooth surface and circular cross-section.Their tensile strength increased from 128 to 368 MPa by adjusting cellulose concentration, ECH concentration, and draw ratio. The crystallinity of the fibers changed from 43.1% to 49.8% after drawing process. Meanwhile, the fibers exhibited a brighter color after dyeing than the viscose rayon. This work promising an avenue for preparation of mechanical strong cellulose fibers.

Fabrication of Shaped Chitin Fibers by Gradient Regeneration Combined with a Physical Pressure Method

“…In consonance with the burgeoning emphasis on sustainable development, the incorporation of agricultural byproducts (such as wood powder and cotton linters) and marine byproducts (including algin and chitin) into the realm of fiber production has emerged as an eminent and discernible trend within the domain of materials science. 17,18 Our scholarly inquiry has unveiled a remarkable phenomenon: at lower temperature regimes, sodium hydroxide (NaOH) demonstrates a remarkable propensity to engage in hydrogen bonding interactions with chitin molecules, leading to the formation of a distinctive inclusion complex. Simultaneously, urea acts as an essential facilitator, enveloping the inclusion compound with a sheathlike structure through hydrogen bonding.…”

“…In consonance with the burgeoning emphasis on sustainable development, the incorporation of agricultural byproducts (such as wood powder and cotton linters) and marine byproducts (including algin and chitin) into the realm of fiber production has emerged as an eminent and discernible trend within the domain of materials science. , …”

Fabrication of Chitosan‐β‐cyclodextrin‐Fe nanofibers for the adsorption of As‐III from aqueous solution using a lab‐scale filtration system

“…The solution was stirred for 45 min at room temperature before being mechanically shaken at 200 rpm. Different studies were performed at various parameters such as adsorption time (10-85 min), As (III) concentrations (10-60 ppm), solution pH (3)(4)(5)(6)(7)(8)(9), and nanofiber mass (2-20 mg). In addition, the adsorbed solutions were analyzed by using an atomic adsorption spectrophotometer.…”

“…6 Adsorption, on the other hand, is a useful technique that is low in cost, and easy to operate and maintain. 7,8 Electrospun nanofibrous membranes (ENMs) are now widely used as adsorbent materials in water treatment applications because of their ability to create highly effective areas, fine fibers, porous media, and interconnected structures, resulting in higher productivity, reliability, and adsorption rate. [9][10][11][12] Different nanofibers such as cellulose, polyacrylonitrile (PAN), polystyrene, nylon, zein, and chitosan have been reported to have applications for the adsorption of heavy metals.…”

“…Even so, most of them face some challenges, such as initial, operational, and maintenance costs, energy sources required, chemical and material use, and disposal issues 6 . Adsorption, on the other hand, is a useful technique that is low in cost, and easy to operate and maintain 7,8 . Electrospun nanofibrous membranes (ENMs) are now widely used as adsorbent materials in water treatment applications because of their ability to create highly effective areas, fine fibers, porous media, and interconnected structures, resulting in higher productivity, reliability, and adsorption rate 9–12 …”