BEH.462/3. 962J Molecular Principles of Biomaterials Spring 2003 micelle 崇 5 mm http://www.ecs.umass.edw/hamilton/matthewlle(micellarcrystalfigurefromwebsiteMatthewBhatia,andRoberts o 5mm hydrogel shown above is a composite box formed by Sciperio printer from Pluronic F-127 and PPF-CO-PEG o Hydrogen bonding o Hydrogen bonds can form between H and C, N, o, and F o Examples Poly (vinyl alcohol) Poly(vinyl alcohol)/PEO blends N一H tcm-H- 一N~o…H-N o Polymers that can form hydrogen bonded gels(5) Poly(vinyl alcohol) Gelatin(natural biopolymer) From Sigma pro o Gelatin is a heterogeneous mixture of water-soluble proteins of high average molecular weights, present in collagen. The proteins are extracted by boiling skin, tendons, ligaments, bones, etc in water. Type A used as a stabilizer adhesives, cements, lithographic and printing inks, plastic compounds s thickener and texturizer in foods in the manufacture of rubber substitutes artificial silk, photographic plates and films, matches, and light filters for Lecture 8 sical gels 4of12BEH.462/3.962J Molecular Principles of Biomaterials Spring 2003 Lecture 8 – Physical gels 4 of 12 5 mm PEO PPO PEO (micellar crystal figure from website, Matthew, Bhatia, and Roberts; http://www.ecs.umass.edu/hamilton/matthew_julie.htm) o 5mm hydrogel shown above is a composite box formed by Sciperio printer from Pluronic F-127 and PPF-co-PEG o Hydrogen bonding o Hydrogen bonds can form between H and C, N, O, and F o Examples: ƒ Poly(vinyl alcohol) ƒ Poly(vinyl alcohol)/PEO blends o Polymers that can form hydrogen bonded gels(5): ƒ Poly(vinyl alcohol) ƒ Gelatin (natural biopolymer) o From Sigma product sheet: o Gelatin is a heterogeneous mixture of water-soluble proteins of high average molecular weights, present in collagen. The proteins are extracted by boiling skin, tendons, ligaments, bones, etc. in water. Type A used as a stabilizer, thickener and texturizer in foods; in the manufacture of rubber substitutes, adhesives, cements, lithographic and printing inks, plastic compounds, artificial silk, photographic plates and films, matches, and light filters for