Journal
CARBOHYDRATE POLYMERS
Volume 264, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2021.118036
Keywords
Non-woody biomass; Cellulose hydrogel; Swelling; Cellulose dissolution; Crosslinking; Depolymerization
Categories
Funding
- Universiti Sains Malaysia through RUI Grant [1001/PFARMASI/8012320]
- Universiti Sains Malaysia [IPS20/PHA/017]
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Hydrogels are a versatile system with potential applications, and hydrogel development from non-woody biomass, especially using native cellulose, shows promise. The design of hydrogels is influenced by factors such as cellulose solubility, crosslinking method, and processing conditions, impacting the properties of the hydrogels.
Hydrogels are an attractive system for a myriad of applications. While most hydrogels are usually formed from synthetic materials, lignocellulosic biomass appears as a sustainable alternative for hydrogel development. The valorization of biomass, especially the non-woody biomass to meet the growing demand of the substitution of synthetics and to leverage its benefits for cellulose hydrogel fabrication is attractive. This review aims to present an overview of advances in hydrogel development from non-woody biomass, especially using native cellulose. The review will cover the overall process from cellulose depolymerization, dissolution to crosslinking reaction and the related mechanisms where known. Hydrogel design is heavily affected by the cellulose solubility, crosslinking method and the related processing conditions apart from biomass type and cellulose purity. Hence, the important parameters for rational designs of hydrogels with desired properties, particularly porosity, transparency and swelling characteristics will be discussed. Current challenges and future perspectives will also be highlighted.
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