BIOMATERIAL
[specific biomaterial]
Nur Istianah, ST.,MT.,M.Eng
Specific biomaterial
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• Water soluble biopolimer
• Gelling biopolimer
• Hydrogels
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• Elastomer
• Rigid polimer
Water soluble biopolimer
• It can be adsorbed or covalently bound to surfaces to make them more hydrophilic
• used as protective coatings to prevent damage during surgery
Water soluble biopolimer
• Poly(N-Vinyl-Pyrrolidinone)
• Polyethylene Glycol
Water soluble biopolimer
• Dextran
• Starch
Gelling biopolimer
• This class of polymers is useful because hydrogels can be formed at mild conditions. These polymers can therefore be used for cell immobilization and for injectable materials that gel in vivo.
• They are also used as coatings for drug tablets to control release in vivo.
Gelling biopolimer
• Poloxamers
• Alginat
Gelling biopolimer
• Gelatin
• Vibrin
Hydrogels
• Hydrogels are materials that swell when placed in aqueous environments but maintain their overall shape.
• It can be formed by cross-linking nearly any water- soluble polymer.
• Hydrogel mechanical properties are dependent on water content. Modulus and yield strength decrease with water content, whereas elongation tends to
increase.
Hydrogels
• Poly(hydroxyethyl methacrylate)
• Chitosan
Hydrogels
• Albumin
• Collagen
• Oxidized cellulose
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Elastomers
• Polyurethane elastomers
Elastomers
• Silicone Elastomers (Polysiloxanes)
• Silicones are more flexible and of lower strength than polyurethanes.
• They are more chemically stable and are used for artificial finger joints, blood vessels, heart valves, breast implants,
• outer ears, and chin and nose implants.
Silicones have high oxygen permeability and are used for membrane oxygenators and soft contact lenses
