Preparation and characterization of chitosan based hydrogels chemical cross‐linked by oxidized cellulose nanowhiskers

Chao, Sheng D.; Zhou, Yiming; Lu, Jingjing; Zhang, Xinyu; Xue, Gi

doi:10.1002/pc.25109

Cited by 14 publications

(5 citation statements)

References 43 publications

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“…Oxidized cellulose does not exhibit these peaks, indicating the removal of lignin during the oxidation process. However, the characteristic CO stretching vibration band appeared at 1735 cm −1 can be attributed to the carbonyl groups on the oxidized cellulose 36 . It can be seen from the Figure 3A that the intensity of the OC peak at 1735 cm −1 is stronger than that of other materials.…”

Section: Resultsmentioning

confidence: 89%

“…However, the characteristic C O stretching vibration band appeared at 1735 cm À1 can be attributed to the carbonyl groups on the oxidized cellulose. 36 It can be seen from the Figure 3A that the intensity of the OC peak at 1735 cm À1 is stronger than that of other materials. As a regioselective surface modification of cellulose, TEMPO-assisted oxidization leads to the formation of anionic carboxylate groups with high densities on the cellulose fibril surface.…”

Section: Physicochemical Analysismentioning

confidence: 82%

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Oxidized cellulose as bio‐adhesive for hydrophobic lignocellulosic bioplastic

Xu,

Wang,

Alam

et al. 2024

Polymer Composites

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This study presents a novel hydrophobic lignocellulosic bioplastic from corn stover reinforced by oxidized cellulose and in situ regenerated lignin. Cellulose‐lignin mixture as a matrix was obtained by acid‐recyclable deep eutectic solvent (DES) pretreatment of corn stover in mild conditions. Triethoxy(octyl)silane (C14H32O3Si) was employed to improve the water stability of the bioplastic by vapor deposition. The results show that the hydrophobic bioplastic has a high tensile strength, measuring 62.36 MPa. The water contact angle of the bioplastic was increased from 8.50° to 121.9° after hydrophobic modification. We prepared oxidized cellulose‐reinforced cellulose paper by different particle size distributions of oxidized cellulose to investigate the reinforcement of oxidized cellulose. The tensile strength of oxidized cellulose cellulose paper increased from 14.41 to 21.18 MPa with the addition of oxidized cellulose. The zeta potential of oxidized cellulose is −47.99 mV, which shows a more negative charge due to carbonyl groups. The repulsive force of oxidized cellulose contributes to the formation of a brick‐and‐mortar microstructure with cellulose‐lignin mixture. It demonstrates that oxidized cellulose can act as bio‐adhesives and has a good toughening effect on the mechanical properties of bioplastic.Highlights Lignocellulosic bioplastic was prepared by DES pretreatment of corn stover. Oxidized cellulose was used to reinforce the lignocellulosic bioplastic. The tensile strength of the bioplastic was 62.36 MPa after the reinforcement process. Trieth‐oxy(octyl)silane was employed to improve water stability. The water contact angle of the bioplastic was increased from 8.50° to 121.9°.

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Section: Resultsmentioning

confidence: 89%

Section: Physicochemical Analysismentioning

confidence: 82%

Oxidized cellulose as bio‐adhesive for hydrophobic lignocellulosic bioplastic

Xu,

Wang,

Alam

et al. 2024

Polymer Composites

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“…The phenomenon of chemical cross-linking in chitosan chains can be linked to the presence of amines and hydroxyl groups. Chemical cross-linking can be accomplished through the utilization of cross-linkers or by means of a photopolymerization reaction (Sheng et al, 2019).…”

Section: Preparation Of Chitosan Hydrogels Via Chemical Cross-linkingmentioning

confidence: 99%

Temperature and pH-sensitive chitosan-collagen hydrogels for antimicrobial and wound healing applications

Ud Din,

Ashraf,

Hussain

et al. 2023

IJEAB

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Hydrogels have proven to be of great value because of their useful properties and functions. Temperature and pH-sensitive chitosan-collagen-based hydrogels have drawn research interest in the area of wound care. Their unique mechanism allows them to release antimicrobial agents in response to changes in the environment and aids in efficient healing of wounds. The current review aims to describe various composite hydrogels of chitosan and collagen, their temperature and pH sensitivity, the antimicrobial effect of chitosan-collagen hydrogels and their applications in wound healing. Sources and properties of chitosan and collagen have also been stated in order to highlight their importance in these hydrogels. The main focus revolves around the potential of chitosan-collagen hydrogels as antimicrobial biomaterials for healing wounds in an efficient manner.

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“…However, due to the abundance of hydroxyl groups, the utilization of natural cellulose in the preparation of hydrogels based on Chinese herb residue requires chemical modification [40,41]. Chemical crosslinking enables cellulose to form a hydrogel with enhanced adsorption capacity and mechanical stability [42]. Commonly used crosslinking agents include citric acid, epichlorohydrin, and glutaraldehyde [43,44].…”

Section: Introductionmentioning

confidence: 99%

Efficient Removal of Heavy Metals from Aqueous Solution Using Licorice Residue-Based Hydrogel Adsorbent

Yin

Zhu

et al. 2023

Gels

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The removal of heavy metals through adsorption represents a highly promising method. This study focuses on the utilization of an abundant cellulose-rich solid waste, licorice residue (LR), as a natural material for hydrogel synthesis. To this end, LR-EPI hydrogels, namely, LR-EPI-5, LR-EPI-6 and LR-EPI-8, were developed by crosslinking LR with epichlorohydrin (EPI), specifically targeting the removal of Pb, Cu, and Cr from aqueous solutions. Thorough characterizations employing Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy confirmed the successful crosslinking of LR-EPIs by EPI, resulting in the formation of porous and loosely structured hydrogels. Batch studies demonstrated the high efficacy of LR-EPI hydrogels in removing the three heavy metal ions from aqueous solutions. Notably, LR-EPI-8 exhibited the highest adsorption capacity, with maximum capacities of 591.8 mg/g, 458.3 mg/g, and 121.4 mg/g for Pb2+, Cr3+, and Cu2+, respectively. The adsorption processes for Pb2+ and Cu2+ were well described by pseudo-second-order kinetics and the Langmuir model. The adsorption mechanism of LR-EPI-8 onto heavy metal ions was found to involve a combination of ion-exchange and electrostatic interactions, as inferred from the results obtained through X-ray photoelectron spectroscopy and FTIR. This research establishes LR-EPI-8 as a promising adsorbent for the effective removal of heavy metal ions from aqueous solutions, offering an eco-friendly approach for heavy metal removal and providing an environmentally sustainable method for the reutilization of Chinese herb residues. It contributes to the goal of “from waste, treats waste” while also addressing the broader need for heavy metal remediation.

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Preparation and characterization of chitosan based hydrogels chemical cross‐linked by oxidized cellulose nanowhiskers

Cited by 14 publications

References 43 publications

Oxidized cellulose as bio‐adhesive for hydrophobic lignocellulosic bioplastic

Oxidized cellulose as bio‐adhesive for hydrophobic lignocellulosic bioplastic

Temperature and pH-sensitive chitosan-collagen hydrogels for antimicrobial and wound healing applications

Efficient Removal of Heavy Metals from Aqueous Solution Using Licorice Residue-Based Hydrogel Adsorbent

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