Abstract：
:The binding properties of poly-L-lysine and chitosan to alginate have been evaluated quantitatively and compared. Poly-L-lysine bound to alginate hydrogel more rapidly than chitosan as poly-L-lysine has a smaller molar hydrodynamic volume. In addition, poly-L-lysine showed a much higher binding capacity (6.14:1) for alginate hydrogel beads than chitosan (2.71:1), and a little higher binding stoichiometry (0.58) to sodium alginate molecules in solution than chitosan (0.49). An exothermic heat of alginate-poly-L-lysine complexes formation of 2.02 kJ/mol was detected. For alginate-chitosan complexes, the binding enthalpy has been seen to be -3.49 kJ/mol. The stability of the polyelectrolyte complexes was related to their binding enthalpy. The alginate-poly-L-lysine complexes could be disintegrated and rebuilt. By contrast, chitosan was bound with alginate in a steady state. These results provide fundamental insights regarding the structure and property relationships of macromolecules, and will be helpful in designing and selecting appropriate polymers.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Ren Y,Xie H,Liu X,Bao J,Yu W,Ma Xdoi
10.1016/j.ijbiomac.2015.12.008subject
Has Abstractpub_date
2016-03-01 00:00:00pages
135-41eissn
0141-8130issn
1879-0003pii
S0141-8130(15)30195-1journal_volume
84pub_type
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journal_title：International journal of biological macromolecules
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journal_title：International journal of biological macromolecules
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