Takada, Kenji; Noda, Takumi; Kobayashi, Takuya; Harimoto, Toyohiro; Singh, Maninder; Kaneko, Tatsuo published the artcile< Synthesis of pH-responsive polyimide hydrogel from bioderived amino acid>, Reference of 4415-87-6, the main research area is bioderived amino acid diamino alpha truxillic tetracarboxylic dianhydride polyimide.
A series of biobased polyimides bearing a structure derived from a predetermined tetracarboxylic dianhydride was synthesized. By ionizing the COOH group of the side chain with potassium hydroxide, four kinds of polyimides were solubilized in water, and the water-soluble polyimides were cast onto films over an aqueous solution, leading to higher optical transparency than that of non-water-soluble polyimides. 1H NMR measurements of the polyimides revealed no residual reactants from the polymerization process or side-chain modification. Partial crosslinking of the water-soluble polyimide chains by condensation of the carboxylate side chain with an amino acid-based diamine such as 4-aminophenylalanine or 4,4′-diamino-α-truxillic acid induced the formation of polyimide hydrogels. The remaining COOK groups of the obtained hydrogel were protonated/deprotonated by changing the pH, accompanied by reversible shrinking and swelling.
Polymer Journal (Tokyo, Japan) published new progress about Amino acids Role: RCT (Reactant), RACT (Reactant or Reagent). 4415-87-6 belongs to class tetrahydrofurans, and the molecular formula is C8H4O6, Reference of 4415-87-6.
Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem