Did vinyl monomer grafting onto biopolymer are eco friendly way to synthesis the materials for different application?
Dear Kumar, my question is what is the difference between Biopolymer Grafting and Hydrogel in polymer chemistry? Not different synthesis methods..
Dear all, biopolymer grafting is a process by which a biopolymer is chemically modified to impart and enhance certain properties, such as the solubility... A hydrogel is a water soluble partially crosslinked polymer with a small amount of a divinyl monomer. Physical crosslinked (entangled) hydrogels are also existing. Regards
The net result of crosslinking is that the molecular weight of the polymer increase with increase with absorbed radiation or by chemical radical initiator until a three dimentional network is formed where each polymer chain is linked to one another chain in average. The the gel or the hydrogel not disolve in their usual solvent onlt it swelling.
The graft copolymer is made of pendant chains of one monomer polymerized in one matrix polymer, containing different types of monomer units. The graft copolymer didn´t form networks , and it can disolve if there are any solvent for both graft monomer and polymer backbone.
1- Hydrogels represent a class of high water content polymers with physical or chemical crosslinks. Physical crosslinks include entangled chains, hydrogen bonding, hydrophobic interaction and crystallite formation. Physical crosslinking gives reversible hydrogels.
Chemical or permanent hydrogels are formed by covalent crosslinking of polymers. The type and degree of crosslinking influences many of the network properties, such as swelling properties and Young’s modulus.
2- The graft copolymers can not form a 3D network. They can dissolve in certain solvents.
The grafting alone between vinyl monomers with biopolymer gives polymers with required properties but will not produce hydrogel
The hydrogel is produced when added crosslinking agent. The polymer becomes a three-dimensional network that loses the water solubility in water but has ability to swelling in water.
It is possible to grafted with vinyl alcohol for example to product Eco Bio-polymer
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