Synthesis, Characterization, and Thermal Properties of Organic–Inorganic Hybrids Based on Gelatin and Organomodified Silicones

Abstract

The synthesis of organic-inorganic hybrids is an interesting approach as it offers the possibility of combining the advantages of organic polymer (elasticity, formability) and inorganic material (hardness, strength, high chemical resistance, and thermal stability). Gelatin-siloxane hybrid materials were prepared in the reaction of gelatin and organomodified silicones containing epoxy-and both epoxy-as well as fluoroalkyl groups. The hybrids obtained were characterized using Fourier transform infrared spectroscopy, proton nuclear magnetic resonance ( 1 H NMR) spectroscopy, and scanning electron microscopic analysis. Thermal properties of the samples were evaluated by means of thermogravimetric analysis and differential scanning calorimetric measurements, showing the influence of type and amount of organosilicon compound on thermal properties of the hybrid materials. The samples obtained with siloxane containing fluoroalkyl groups as well as with mixed siloxanes revealed higher thermal stability than unmodified gelatin. Glass transition temperatures of the hybrids occurred at lower values than for gelatin, exhibiting the plasticizing effect of the applied siloxanes. Enthalpy values of the hybrids decreased, indicating the changes in the helical structure of gelatin caused by the introduction of siloxane. C

Modulating stability and mechanical properties of silica–gelatin hybrid by incorporating epoxy‐terminated polydimethylsiloxane oligomer

“…As the hybrid incorporated ES, the characteristic bands of Si‐O‐Si increased in intensity. In addition, characteristic bands of 1260 cm −1 and 802 cm −1 in ES/GT‐G spectrum, which did not appear in the GT‐G spectrum, were assigned to Si‐CH 3 bonds of the ES molecule . Bands of Si‐O‐Si and Si‐C bonds demonstrated successful crosslinking between functional polydimethylsiloxane oligomer and gelatin …”

“…In addition, characteristic bands of 1260 cm 21 and 802 cm 21 in ES/GT-G spectrum, which did not appear in the GT-G spectrum, were assigned to Si-CH 3 bonds of the ES molecule. 26 Bands of Si-O-Si and Si-C bonds demonstrated successful crosslinking between functional polydimethylsiloxane oligomer and gelatin. 24 Thermal Stability of Hybrid Materials The thermal stability of hybrid materials was investigated based on their denaturation behavior compared with pure gelatin, as evaluated by differential scanning calorimetry analysis (DSC).…”

“…A few studies reported gelatin modified with functionalized PDMS. For example, gelatin modified with epoxy‐terminated PDMS material was prepared to improve the flexibility and hydrophobicity of hybrids, and gelatin with higher stability and hydrophobicity was achieved by modification of PDMS containing epoxy and fluoroalkyl groups . Our previous study reported a cross‐linked collagen fiber matrix prepared by modifying skin collagen fiber, from which gelatin is derived, with an epoxy‐terminated PDMS oligomer .…”

“…For example, gelatin modified with epoxy-terminated PDMS material was prepared to improve the flexibility and hydrophobicity of hybrids, 24,25 and gelatin with higher stability and hydrophobicity was achieved by modification of PDMS containing epoxy and fluoroalkyl groups. 26 Our previous study reported a crosslinked collagen fiber matrix prepared by modifying skin collagen fiber, from which gelatin is derived, with an epoxy-terminated PDMS oligomer. 27 In addition, PDMS-modified chitosan was prepared by the reaction between epoxidized PDMS and chitosan, exhibiting enhancement in flexibility and water swellability.…”

Preparation and Enrichment Properties of Magnetic Dodecyl Chitosan/Silica Composite for Emerging Bisphenol Contaminants

“…Various silicon alkoxide with active groups can be chosen as the precursors of silica components to modify the characteristic of chitosan/silica composites [ 24 ]. The homogeneous structure of the chitosan/silica composite is expected to be obtained more easily than other inorganic matrices through the sol-gel method [ 25 ]. On the other hand, the separation mode and regeneration of the sorbents from the sample matrix also affect the popularization of sorption technique in the real application.…”