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Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization

A new and simple method to develop highly stretchable and resilient hydrogels via ultraviolet light-emitting diode (UV LED) photopolymerization was carried out. Firstly, a single network (SN) polyacrylamide (PAAm) hydrogel was prepared. The SN hydrogel had achieved about > 98 % monomer conversion...

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Main Author: Abdul Khalid, Nur Amanina
Format: Thesis
Language:English
Published: 2019
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TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/91996/1/NurAmaninaAbdulKhalidMSChE2019.pdf
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spelling my.utm.919962021-08-30T04:59:07Z http://eprints.utm.my/id/eprint/91996/ Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization Abdul Khalid, Nur Amanina TP Chemical technology A new and simple method to develop highly stretchable and resilient hydrogels via ultraviolet light-emitting diode (UV LED) photopolymerization was carried out. Firstly, a single network (SN) polyacrylamide (PAAm) hydrogel was prepared. The SN hydrogel had achieved about > 98 % monomer conversion, 66 to 82 % gel fraction and 10.7 ± 0.1 to 4.1 ± 0.01 swelling degree. Differential scanning calorimetry result showed the existence of bound and free water in PAAm hydrogel which have interrelation with the swelling and tensile properties. Nevertheless, the SN hydrogels demonstrated poor tensile properties (tensile strength: ~ 0.06 MPa, Young’s modulus: 0.26 ± 0.02 MPa, elongation at break: ~ 32 ± 3.4 % and toughness: ~ 1104 ± 90.5 J/m2) which severely limit their extensive uses for the advanced functional material. Thus, double network (DN) hydrogels were prepared and characterized by adding chitosan hyaluronic acid (ChiHA) to PAAm SN hydrogels at concentration ranging from 20-50 wt%. The optimized DN hydrogel with 30 wt% of ChiHA composition exhibited higher monomer conversion (up to 99 %), gel fraction (~ 73 to 98 %) and tensile properties (tensile strength: ~ 0.16 MPa, Young’s modulus: ~ 0.47 MPa, elongation at break: ~ 49 ± 0.1 % and toughness: ~ 1785 ± 58.4 J/m2). However, the resilience property in DN hydrogels was low as indicated by large hysteresis upon loading-unloading cycle. To overcome this problem, the selected compositions of DN hydrogels with 40 and 50 wt% of overall monomer concentration (OMC) were modified to produce elastomeric hydrogels (EH). Silicone urethane acrylate (SUA), an elastomeric and resilient material, was integrated into DN hydrogels in a “sandwich-like” form via photopolymerization. EH was successfully polymerized by reaching up to 99 % of gel fraction. The peaks from Fourier transform infrared spectra at 1262, 1096, 1023 and 802 cm-1 were attributed to Si–CH3, Si–O–Si, –C-O and Si-C stretching mode for SUA network. EH possessed excellent tensile properties where its tensile strength, Young’s modulus, toughness and elongation at break were ~ 2-13 times larger than SN and DN hydrogels. EH also exhibited a remarkable compressive strength (~ 1.5 MPa), exceptional fracture toughness (~ 36851 J/m2) and highly resilient (~ 93 %). These exceptional properties were due to the reversible assembly of the strong and flexible SUA chain, which could be explained by the dissipation of the crack energy along the EH network. The temporarily molecular dissociation in EH network which could be instantly reconstructed during unloading process may also be responsible. These fascinating properties of the novel EH had offered an alternative candidate for biomaterial applications. 2019 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/91996/1/NurAmaninaAbdulKhalidMSChE2019.pdf Abdul Khalid, Nur Amanina (2019) Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization. Masters thesis, Universiti Teknologi Malaysia, Faculty of Engineering - School of Chemical & Energy Engineering. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:139401
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Abdul Khalid, Nur Amanina
Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization
description A new and simple method to develop highly stretchable and resilient hydrogels via ultraviolet light-emitting diode (UV LED) photopolymerization was carried out. Firstly, a single network (SN) polyacrylamide (PAAm) hydrogel was prepared. The SN hydrogel had achieved about > 98 % monomer conversion, 66 to 82 % gel fraction and 10.7 ± 0.1 to 4.1 ± 0.01 swelling degree. Differential scanning calorimetry result showed the existence of bound and free water in PAAm hydrogel which have interrelation with the swelling and tensile properties. Nevertheless, the SN hydrogels demonstrated poor tensile properties (tensile strength: ~ 0.06 MPa, Young’s modulus: 0.26 ± 0.02 MPa, elongation at break: ~ 32 ± 3.4 % and toughness: ~ 1104 ± 90.5 J/m2) which severely limit their extensive uses for the advanced functional material. Thus, double network (DN) hydrogels were prepared and characterized by adding chitosan hyaluronic acid (ChiHA) to PAAm SN hydrogels at concentration ranging from 20-50 wt%. The optimized DN hydrogel with 30 wt% of ChiHA composition exhibited higher monomer conversion (up to 99 %), gel fraction (~ 73 to 98 %) and tensile properties (tensile strength: ~ 0.16 MPa, Young’s modulus: ~ 0.47 MPa, elongation at break: ~ 49 ± 0.1 % and toughness: ~ 1785 ± 58.4 J/m2). However, the resilience property in DN hydrogels was low as indicated by large hysteresis upon loading-unloading cycle. To overcome this problem, the selected compositions of DN hydrogels with 40 and 50 wt% of overall monomer concentration (OMC) were modified to produce elastomeric hydrogels (EH). Silicone urethane acrylate (SUA), an elastomeric and resilient material, was integrated into DN hydrogels in a “sandwich-like” form via photopolymerization. EH was successfully polymerized by reaching up to 99 % of gel fraction. The peaks from Fourier transform infrared spectra at 1262, 1096, 1023 and 802 cm-1 were attributed to Si–CH3, Si–O–Si, –C-O and Si-C stretching mode for SUA network. EH possessed excellent tensile properties where its tensile strength, Young’s modulus, toughness and elongation at break were ~ 2-13 times larger than SN and DN hydrogels. EH also exhibited a remarkable compressive strength (~ 1.5 MPa), exceptional fracture toughness (~ 36851 J/m2) and highly resilient (~ 93 %). These exceptional properties were due to the reversible assembly of the strong and flexible SUA chain, which could be explained by the dissipation of the crack energy along the EH network. The temporarily molecular dissociation in EH network which could be instantly reconstructed during unloading process may also be responsible. These fascinating properties of the novel EH had offered an alternative candidate for biomaterial applications.
format Thesis
author Abdul Khalid, Nur Amanina
author_facet Abdul Khalid, Nur Amanina
author_sort Abdul Khalid, Nur Amanina
title Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization
title_short Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization
title_full Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization
title_fullStr Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization
title_full_unstemmed Synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization
title_sort synthesis and characterization of elastomeric silicone urethane acrylate hydrogels via ultraviolet light-emitting diode photopolymerization
publishDate 2019
url http://eprints.utm.my/id/eprint/91996/1/NurAmaninaAbdulKhalidMSChE2019.pdf
http://eprints.utm.my/id/eprint/91996/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:139401
_version_ 1709667369997041664
score 13.211869

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