Journal
FOOD HYDROCOLLOIDS
Volume 104, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2020.105734
Keywords
Gelatin; HPMC; Synchrotron-FTIR microscopy; Raman spectroscopy; Interface
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Funding
- Elite Scientists Sponsorship Program by CAST (YESS Program)
- National Natural Science Foundation of China [31771930, 11505267]
- Natural Science Foundation of Jiangsu Province [BK20191407]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province [19KJA520001]
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Blending different polymers for composite formulations can improve the functionalities of the products. The compatibility between hydroxypropyl methylcellulose (HPMC) and gelatin was studied using Chemical mapping analysis such as synchrotron micro-infrared spectroscopy (mu SR-FTIR) and confocal Raman microscopy. The interface and phase composition of the blend films with varying ratios of gelatin and HPMC were analyzed in detail. It was found that the distribution patterns of continuous matrices and dispersed phases changed with varying concentrations of the components. Raman spectroscopy based imaging analysis showed that HPMC easily aggregated to form continuous phases. Both mu SR-FTIR and Raman microscopic analysis confirmed the existence of intermediate phases in the composites from the molecular interactions between the two components. Overall, the Chemical mapping techniques were useful to study the phase composition of composites of polysaccharides and proteins.
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