Abstract
Herein, we present a new process for the preparation of cellulose-chitosan foams using an aqueous lithium bromide (LiBr) solution. After obtaining hydrogels via dissolution-regeneration from an aqueous LiBr solution and methanol, cellulose-chitosan foams were prepared via solvent exchange (water → ethanol → t-butyl alcohol) followed by freeze-drying. The amino group content and elemental analysis confirmed the successful preparation of three foam grades by controlling the blend ratio of cellulose and chitosan. The cellulose-chitosan foams possessed three-dimensional porous networks composed of nano-fibrils. The swelling properties of the foams improved due to the presence of amino groups. The cellulose-chitosan foams exhibited a higher adsorption capacity (1170.2 mg/g) of Congo red compared to the cellulose (623.2 mg/g). The adsorption–desorption process of Congo red demonstrated the strong interactions between chitosan and Congo red. The cellulose-chitosan foams could be applied as an adsorbent for the treatment of industrial wastewater, especially for anionic dyes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
