pH- and thermoresponsive properties of hybrid systems based on gelatin and organomodified SiO2 obtained by the sol-gel method

1Bey, IM
1Tolstov, AL
1Lebedev, EV
1Institute of Macromolecular Chemistry of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2016, 11:70-77
Section: Chemistry
Language: Russian

We have studied the pH- and thermoresponsive characteristics of the composites based on biopolymer gelatin and 3-gly cidyloxypropyltrimethoxysilane obtained by the sol-gel method. Sorption capacity of the systems reaches 2700 % at pH 12, whereas at pH 2—9 this parameter is at most 50—90 % depending on the composition. pH-sensitivity of the composites could be controlled by the transformation of the matrix into a basic form and introducing the silver nanoparticles into the structure . Thermoresponsive activity of the hybrid composites is suppressed by their structurization under the action of hydrogen and hydrophobic interactions of different strengths and crosslinks of different nature.

Keywords: biocomposite, gelatin, hybrid structure, lyophilic properties, polysiloxane, sensors, silver
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