Induced Aggregation of Epoxy Polysiloxane Grafted Gelatin by Organic Solvent and Green Application

Abstract

In this paper, we studied the aggregation of amphiphilic polymer epoxy-terminated polydimethylsiloxane (PDMS-E) grafted gelatin (PGG) in water induced by methanol, ethanol, 2-propanol, acetone, tetrahydrofuran (THF), and 1,4-dioxane. The aggregation pattern of the polymer was monitored by infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and scanning electron microscopy. It was revealed that the aggregate morphology showed clear dependence on the solvent polarity. The PGG aggregates had regular spherical morphology in polar solvents, including water, methanol, ethanol, 2-propanol, and acetone. The coating performance was evaluated by X-ray photoelectron spectroscopy and friction experiment, and PGG and acetone coating exhibited excellent coating performance on the surface of pigskin. Gel was formed in acetone and tetrahydrofuran (THF) with the slow evaporation of solvent, and this property can possibly be applied to industrial sewage treatment. White precipitate and soft film were formed in non-polar 1,4-dioxane.

Ionically and Enzymatically Dual Cross-Linked Oxidized Alginate Gelatin Hydrogels with Tunable Stiffness and Degradation Behavior for Tissue Engineering

“…Figure depicts ATR-FTIR spectra of mTG as well as (+) mTG and (−) mTG cross-linked ADA-GEL (Figure a). Characteristic vibrational bands for GEL at 1628 (amide I) and 1522 cm –1 (amide II) stretching vibrations can be observed (Figure a). − The spectrum of ADA-GEL indicates characteristic peaks at 1628 (amide I), 1543, 1069, and 1034 cm –1 . The peak shift from 1522 to 1543 cm –1 for amide II in comparison to pristine GEL indicates ν­(CN), suggesting Schiff’s base formation in ADA-GEL. , The band of amide II at 1522 cm –1 for GEL is absent in both ADA-GEL (−) mTG and (+) mTG spectra.…”