caa a22 4500 463193709 CHVBK 20180406164916.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10973-006-7722-z doi (NATIONALLICENCE)springer-10.1007/s10973-006-7722-z Thermodynamiccharacteristics of gelation for methyl-cellulose hydrogels [Elektronische Daten] [Y. Lam, Sunil Joshi, Bee Tan] Methylcellulose (MC) is a thermo-reversible physical hydrogel. This study investigates the thermodynamic characteristics of gelation mechanism for MC. The relative and absolute specific heat capacity values of the hydrogel system were modeled using an empirical formulation to facilitate calculation of thermodynamic parameters. Experiments verifying the assumptions for the model formulation were conducted and are discussed. Parameters such as enthalpy, entropy, and changes in their magnitude as a function of temperature were calculated and their trends were studied. The implications of these observations on the various stages of the gel formation process and the associated mechanisms are evaluated. The studies revealed that the gelation of MC is a temperature- driven process rather than only driven by the heat input, and it attains a state of equilibrium under isothermal conditions. During gelation, the entropy of the overall (MC+water) system increases due to an increase in the disorderliness of the MC system. Springer-Verlag, 2006 DSC nationallicence enthalpy nationallicence entropy nationallicence hydrogel nationallicence methyl-cellulose nationallicence Lam Y. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639 798, Singapore, Republic of Singapore aut Joshi Sunil School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639 798, Singapore, Republic of Singapore aut Tan Bee School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639 798, Singapore, Republic of Singapore aut Journal of Thermal Analysis and Calorimetry Springer Netherlands 87/2(2007-01-01), 475-482 1388-6150 87:2<475 2007 87 10973 https://doi.org/10.1007/s10973-006-7722-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7722-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lam Y. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639 798, Singapore, Republic of Singapore aut NATIONALLICENCE 700 1- Joshi Sunil School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639 798, Singapore, Republic of Singapore aut NATIONALLICENCE 700 1- Tan Bee School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639 798, Singapore, Republic of Singapore aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer Netherlands 87/2(2007-01-01), 475-482 1388-6150 87:2<475 2007 87 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer