13C NMR characterization of hydrated 13C labeled Bombyx mori silk fibroin sponges prepared using glycerin, poly(ethylene glycol diglycidyl ether) and poly(ethylene glycol) as porogens

2017 ◽  
Vol 5 (11) ◽  
pp. 2152-2160 ◽  
Author(s):  
Tetsuo Asakura ◽  
Masanori Endo ◽  
Rina Fukuhara ◽  
Yugo Tasei
Keyword(s):  
Amino Acid ◽  
Ethylene Glycol ◽  
Silk Fibroin ◽  
Diglycidyl Ether ◽  
Amino Acid Residues ◽  
Poly Ethylene Glycol ◽  
Nmr Characterization ◽  
Bombyx Mori Silk ◽  
Poly Ethylene

Conformational characterization of the amino acid residues in hydrated silk fibroin sponges.

1H-NMR characterization of poly(ethylene glycol) and polydimethylsiloxane copolymer

2016 ◽  
Author(s):  
Ain Athirah Zainuddin ◽  
Rizafizah Othaman ◽  
Wan Syaidatul Aqma Wan Mohd Noor ◽  
Farah Hannan Anuar
Keyword(s):  
Ethylene Glycol ◽  
1H Nmr ◽  
Poly Ethylene Glycol ◽  
Nmr Characterization ◽  
Poly Ethylene

scholarly journals Synthesis of Network Polymers by Means of Addition Reactions of Multifunctional-Amine and Poly(ethylene glycol) Diglycidyl Ether or Diacrylate Compounds

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2047
Author(s):  
Naofumi Naga ◽  
Mitsusuke Sato ◽  
Kensuke Mori ◽  
Hassan Nageh ◽  
Tamaki Nakano
Keyword(s):  
Ethylene Glycol ◽  
Room Temperature ◽  
Addition Reaction ◽  
Monomer Concentration ◽  
Diglycidyl Ether ◽  
Porous Polymers ◽  
Addition Reactions ◽  
Poly Ethylene Glycol ◽  
Network Polymers ◽  
Poly Ethylene

Addition reactions of multi-functional amine, polyethylene imine (PEI) or diethylenetriamine (DETA), and poly(ethylene glycol) diglycidyl ether (PEGDE) or poly(ethylene glycol) diacrylate (PEGDA), have been investigated to obtain network polymers in H2O, dimethyl sulfoxide (DMSO), and ethanol (EtOH). Ring opening addition reaction of the multi-functional amine and PEGDE in H2O at room temperature or in DMSO at 90 °C using triphenylphosphine as a catalyst yielded gels. Aza-Michael addition reaction of the multi-functional amine and PEGDA in DMSO or EtOH at room temperature also yielded corresponding gels. Compression test of the gels obtained with PEI showed higher Young’s modulus than those with DETA. The reactions of the multi-functional amine and low molecular weight PEGDA in EtOH under the specific conditions yielded porous polymers induced by phase separation during the network formation. The morphology of the porous polymers could be controlled by the reaction conditions, especially monomer concentration and feed ratio of the multi-functional amine to PEGDA of the reaction system. The porous structure was formed by connected spheres or a co-continuous monolithic structure. The porous polymers were unbreakable by compression, and their Young’s modulus increased with the increase in the monomer concentration of the reaction systems. The porous polymers absorbed various solvents derived from high affinity between the polyethylene glycol units in the network structure and the solvents.

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