Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10601685 | Carbohydrate Polymers | 2013 | 7 Pages |
Abstract
Starch is a hydrophilic biopolymer that is desirable in synthesizing new hydrogels. l-Aspartic acid is a multifunctional amino acid that can be used to modify starch in order to introduce new functional groups on its chains. In this research, a series of novel natural hydrogels based on starch and l-aspartic acid have been synthesized. These hydrogels exhibited temperature-responsive swelling behavior, pH sensitivity and superabsorbency properties. They were characterized by Nuclear Magnetic Resonance (NMR), Infra-Red Spectroscopy (IR), and X-ray Diffraction (XRD). The thermal properties of the hydrogels were evaluated using Thermo-Gravimetric Analysis (TGA) and Differential Scanning Calorimetery (DSC). Swelling studies were carried out at various temperatures and pHs. All of the hydrogels exhibited a high swelling ratio; in aqueous media, this value was greater at higher pH than at lower pH. These properties introduce a novel carrier having applications in delivery systems.
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Physical Sciences and Engineering
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Authors
Mohammad Reza Vakili, Nahid Rahneshin,