Thermodynamic water adsorption analysis of biodegradable films based on corn starch-chitosan added with triblock copolymers

被引：1
|
作者：
Jimenez-Regalado, Enrique Javier [1 ]
Diaz-Cruz, Claudio Alonso [2 ]
Velazquez, Gonzalo [2 ]
Aguirre-Loredo, Rocio Yaneli [1 ,3 ]
Guadarrama-Lezama, Andrea Y. [4 ]
机构：
[1] Ctr Invest Quim Aplicada CIQA, Blvd Enr Reyna Hermosillo 140, Saltillo 25294, Coahuila, Mexico
[2] Inst Politecn Nacl, CICATA Unidad Queretaro, Cerro Blanco 141, Queretaro 76090, Qro, Mexico
[3] Investigadora Mex CONAHCYT CIQA, Av Insurgentes 1562, Mexico City 03940, Mexico
[4] Univ Autonoma Estado Mexico, Fac Quim, Paseo Colon Esq Paseo Tollocan S-N, Toluca 50120, Mexico, Mexico
来源：
JOURNAL OF FOOD ENGINEERING | 2025年 / 386卷
关键词：
Biodegradable polymers; Starch; Chitosan; Copolymers; Water adsorption isotherms; Thermodynamic properties; MOISTURE SORPTION ISOTHERMS; ENTHALPY; BEHAVIOR; ENTROPY; TEMPERATURE; RANGE; DRUG;
D O I：
10.1016/j.jfoodeng.2024.112285
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Adding triblock copolymers to hydrophilic films is an option to improve the functional properties and water resistance under high equilibrium relative humidity (RHeq) environments. Sorption isotherms of corn starchchitosan based films added with triblock copolymers (L64 and P123) measured at 4, 20, and 36 degrees C were fitted using the Guggenheim-Anderson-De Boer equation. Thermodynamic analysis allowed allocating the minimum integral entropy value between 0.09 and 0.50 of water activity. The compensation enthalpy-entropy showed that the entropy driven the process at low water activities (0.10- 0.33) and the enthalpy driven the water sorption at high water activities ( 0.33- 0.90).
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页数：10
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