Composition Gradient, Structure, and Mechanical Properties of Mono Epoxy Terminated Polydimethylsiloxanes Grafted Gelatin Films
- Authors: Jing Li 1, Chi H.1, Xu J.1, Li T.1
- 
							Affiliations: 
							- Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering, QiLu University of Technology
 
- Issue: Vol 92, No 9 (2018)
- Pages: 1733-1741
- Section: Structure of Matter and Quantum Chemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/170124
- DOI: https://doi.org/10.1134/S0036024418090108
- ID: 170124
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Abstract
In present study, α-[3-(2,3-epoxy propoxy) propyl]-ω-butyl-polydimethylsiloxanes grafted gelatin (PGG) compositional gradient film was successfully fabricated by combining a solvent induced self-assembly procedure and the interaction between polymer and air/substrate induced migration. The variation of gelatin superstructures and the transformation of PGG aggregate structure with tuning volume ratio of water/ethanol studied by Atomic force microscopy (AFM), Fourier-transform infrared (FTIR) and High-resolution transmission electron microscopy (HR–TEM). At 1 : 3 vol/vol, gelatin chains self-assembled to cyclic aggregates that tended to deposit on the gelatin substrate, while PGG formed core–shell structure which should migrate to air-liquid interface driven by low free energy of PDMS chain during drying. X-ray photoelectron spectroscopy (XPS) showed that the surface of gradient film was covered with PDMS component and strong intermolecular interactions existed in between polymer and solvent molecules at 1 : 3 vol/vol. The gradients of PDMS composition along longitudinal orient in film were further confirmed by scanning electron microscopy-energy dispersive spectroscopy (SEM−EDS) with line scan. Contact angle results exhibited a successive decrease of hydrophobicity along longitudinal orient in gradient film. Dynamic mechanical analysis (DMA) results showed two tan δ and lower storage modulus in gradient than that of blank gelatin film, which led to good flexibility of gradient film.
About the authors
Jing Li
Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering,QiLu University of Technology
														Email: litianduo@163.com
				                					                																			                												                	China, 							Jinan, 250353						
Hong Chi
Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering,QiLu University of Technology
														Email: litianduo@163.com
				                					                																			                												                	China, 							Jinan, 250353						
Jing Xu
Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering,QiLu University of Technology
							Author for correspondence.
							Email: xujing@qlu.edu.cn
				                					                																			                												                	China, 							Jinan, 250353						
Tianduo Li
Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering,QiLu University of Technology
							Author for correspondence.
							Email: litianduo@163.com
				                					                																			                												                	China, 							Jinan, 250353						
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