Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable Properties
We developed and characterized a new hydrogel system based on the physical and chemical interactions of pectin partially modified with thiol groups and chitosan modified with acrylate end groups. Gelation occurred at high pectin thiol ratios, indicating that a low acrylated chitosan concentration in...
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doaj-3f7aab5321e9494e88999f73601ccd622021-01-15T00:06:10ZengMDPI AGPolymers2073-43602021-01-011326626610.3390/polym13020266Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable PropertiesShaked Eliyahu0Alexandra Galitsky1Esther Ritov2Havazelet Bianco-Peled3The Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, IsraelDepartment of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 3200003, IsraelDepartment of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 3200003, IsraelThe Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, IsraelWe developed and characterized a new hydrogel system based on the physical and chemical interactions of pectin partially modified with thiol groups and chitosan modified with acrylate end groups. Gelation occurred at high pectin thiol ratios, indicating that a low acrylated chitosan concentration in the hydrogel had a profound effect on the cross-linking. Turbidity, Fourier transform infrared spectroscopy, and free thiol determination analyses were performed to determine the relationships of the different bonds inside the gel. At low pH values below the pKa of chitosan, more electrostatic interactions were formed between opposite charges, but at high pH values, the Michael-type addition reaction between acrylate and thiol took place, creating harder hydrogels. Swelling experiments and Young’s modulus measurements were performed to study the structure and properties of the resultant hydrogels. The nanostructure was examined using small-angle X-ray scattering. The texture profile analysis showed a unique property of hydrogel adhesiveness. By implementing changes in the preparation procedure, we controlled the hydrogel properties. This hybrid hydrogel system can be a good candidate for a wide range of biomedical applications, such as a mucosal biomimetic surface for mucoadhesive testing.https://www.mdpi.com/2073-4360/13/2/266acrylated chitosanthiolated pectinhybrid hydrogelsmucosal mimeticpolysaccharide hydrogels |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shaked Eliyahu Alexandra Galitsky Esther Ritov Havazelet Bianco-Peled |
spellingShingle |
Shaked Eliyahu Alexandra Galitsky Esther Ritov Havazelet Bianco-Peled Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable Properties Polymers acrylated chitosan thiolated pectin hybrid hydrogels mucosal mimetic polysaccharide hydrogels |
author_facet |
Shaked Eliyahu Alexandra Galitsky Esther Ritov Havazelet Bianco-Peled |
author_sort |
Shaked Eliyahu |
title |
Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable Properties |
title_short |
Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable Properties |
title_full |
Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable Properties |
title_fullStr |
Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable Properties |
title_full_unstemmed |
Hybrid Acrylated Chitosan and Thiolated Pectin Cross-Linked Hydrogels with Tunable Properties |
title_sort |
hybrid acrylated chitosan and thiolated pectin cross-linked hydrogels with tunable properties |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2021-01-01 |
description |
We developed and characterized a new hydrogel system based on the physical and chemical interactions of pectin partially modified with thiol groups and chitosan modified with acrylate end groups. Gelation occurred at high pectin thiol ratios, indicating that a low acrylated chitosan concentration in the hydrogel had a profound effect on the cross-linking. Turbidity, Fourier transform infrared spectroscopy, and free thiol determination analyses were performed to determine the relationships of the different bonds inside the gel. At low pH values below the pKa of chitosan, more electrostatic interactions were formed between opposite charges, but at high pH values, the Michael-type addition reaction between acrylate and thiol took place, creating harder hydrogels. Swelling experiments and Young’s modulus measurements were performed to study the structure and properties of the resultant hydrogels. The nanostructure was examined using small-angle X-ray scattering. The texture profile analysis showed a unique property of hydrogel adhesiveness. By implementing changes in the preparation procedure, we controlled the hydrogel properties. This hybrid hydrogel system can be a good candidate for a wide range of biomedical applications, such as a mucosal biomimetic surface for mucoadhesive testing. |
topic |
acrylated chitosan thiolated pectin hybrid hydrogels mucosal mimetic polysaccharide hydrogels |
url |
https://www.mdpi.com/2073-4360/13/2/266 |
work_keys_str_mv |
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