ABSTRACT
Hydrogels are an upcoming class of hydrophilic, polymeric three-dimensional networks with significant absorbing capacity for water and biological fluids. Chemically cross-linked Polyethylene Glycol hydrogels are synthetic and biologically active; they act as a scaffold for protein/recombinant and tissue production. Xanthan gum is a microbe-based, branched-chain, high–molecular weight extracellular heteropolysaccharide obtained industrially under aerobic conditions from Xanthomonas campestris employed as thickener in cosmetics and in food. Hydroxyethyl cellulose is a crucial spinoff cellulose polysaccharide, which has wide application in drug delivery. It is employed as a thickening agent in emulsions and suspension and for film formation and water retention, and is therefore used for formulating hydrogels for controlled drug delivery. Pectin is a complex natural biopolymer that has found wide application in the biotechnology and pharmaceutical industry. An initiator is a chemical species with the innate ability to react with monomer, thereby forming an intermediate product, which reacts with other monomers within polymeric blends.
