caa a22 4500 445385359 CHVBK 20180317143030.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10924-011-0289-1 doi (NATIONALLICENCE)springer-10.1007/s10924-011-0289-1 Structure and Property of Porous Polyvinylalcohol Hydrogels for Microorganism Immobilization [Elektronische Daten] [Xianyu Li, Anyang Hu, Lin Ye] The porous polyvinylalcohol (PVA) hydrogel was prepared by chemical crosslinking in the saturated boric acid solution with sodium bicarbonate (SBC) as porogen. It was found that addition of SBC decreased the mechanical strength of the gel beads, while the gel permeability was improved. The equilibrium swelling rate and the swelling rate constant k of gel beads increased significantly by addition of SBC. Most of water in PVA hydrogel was in the form of free water and freezing bound water. With increasing SBC content, the total water content of the gel increased, in which the free water content increased remarkably, due to the formation of a large number of pores, and in the meantime, n values, characterizing the mole content of non-freezing bound water, were also improved greatly, indicating of the enhancement of the interaction between PVA molecules and water molecules. SEM observation showed that by adding SBC, many pores formed on the surface and inside gels, which provided channels for microbial metabolites. Microorganism could be successfully entrapped in the porous PVA beads, and addition of SBC made COD removal rate of the gel beads increase significantly. Springer Science+Business Media, LLC, 2011 Polyvinylalcohol (PVA) hydrogel nationallicence Sodium bicarbonate (SBC) nationallicence Porous structure nationallicence Microorganism immobilization nationallicence Li Xianyu State Key Lab. of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, 610065, Chengdu, China aut Hu Anyang Sichuan Vinylon Factory, Sinopec, 401254, Chongqin, China aut Ye Lin State Key Lab. of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, 610065, Chengdu, China aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/2(2011-06-01), 398-404 1566-2543 19:2<398 2011 19 10924 https://doi.org/10.1007/s10924-011-0289-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-011-0289-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Xianyu State Key Lab. of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, 610065, Chengdu, China aut NATIONALLICENCE 700 1- Hu Anyang Sichuan Vinylon Factory, Sinopec, 401254, Chongqin, China aut NATIONALLICENCE 700 1- Ye Lin State Key Lab. of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, 610065, Chengdu, China aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/2(2011-06-01), 398-404 1566-2543 19:2<398 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer