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Preparation and properties of gelatin films incorporated with N-hydroxysuccinimide-activated end-bit binary acid

Chen Zhuang, Fu-Rong Tao, and Yue-Zhi Cui

aShandong Provincial Key Laboratory of Fine Chemicals, Qilu University of Technology, Jinan 250353, China

 

E-mail: taofurong17329@126.com

Abstract: A series of novel cross-linkers, N-hydroxysuccinimide (NHS)-activated end-bit binary acid (NHS- C4, C5, C6, C8, C10, C14), were synthesised to modify gelatin films and the crosslinking effects were compared. Homogeneous films with the exception of the film crosslinked by NHS-C14 were observed and the thickness was measured using a scanning electron microscope. The section feature influenced by different film-treatment conditions was also recorded. The differential scanning calorimetry results indicated higher thermal stability. The water contact angles confirmed enhanced hydrophobicity. NHS-C6, which was used as a probe crosslinker, exhibited the best crosslinking effect that the content of the free -NH2 achieved was the lowest out of all the crosslinkers. The biodegradation results of gelatin films modified by NHS-C6 exhibited better degradation-resistance and excellent stability. In addition, the optimal experimental conditions were 45°C for 12 h when [NHS-C6]/[-NH2] = 2.5.

Keywords: gelatin – crosslinking – NHS-Cn – hydrophobicity – homogeneity film

Full paper is available at www.springerlink.com.

DOI: 10.1515/chempap-2015-0226

 

Chemical Papers 70 (4) 505–514 (2016)

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