期刊
ACS APPLIED POLYMER MATERIALS
卷 3, 期 3, 页码 1499-1507出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.0c01358
关键词
calcium alginate; polyvinyl alcohol; boronate; proteins; encapsulation; drug release
资金
- Human Frontiers Science Program [RGP0002/2018]
The high porosity of calcium alginate hydrogels can be controlled by treatment with polyvinyl alcohol and cross-linking with diboronic acids, effectively blocking larger pores. This process reduces leaching of proteins trapped in the hydrogels by 20-30 fold, confirmed by microscopy techniques.
The high porosity of calcium alginate hydrogels was controlled by its treatment with polyvinyl alcohol followed by cross-linking with diboronic acids, which blocks larger pores in calcium alginate. Low molecular weight (11-31 kDa) polyvinyl alcohol selectively diffuses into larger pores of calcium alginate hydrogels, and the subsequent cross-linking with 1,3-benzenediboronic acid is highly efficient, providing stoichiometry of one 1,3-benzenediboronic acid per four OH groups of polyvinyl alcohol. Cross-linking blocks larger pores in calcium alginate hydrogels, decreasing leaching of model bovine serum albumin, insulin, and myoglobin proteins physically entrapped in calcium alginate hydrogels by 20-30 fold. Internal pore blockage was confirmed by scanning electron microscopy and surface pore closure by liquid atomic force microscopy.
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