Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell Structure
Hydrogels are highly hydrophilic polymers that have been used in a wide range of applications. In this study, we prepared PVA–CS/SA–Ca<sup>2+</sup> core–shell hydrogels with bilayer space by cross-linking PVA and CS to form a core structure and chelating SA and Ca<sup>2+</sup>...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-01-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/14/1/212 |
| _version_ | 1797497776190259200 |
|---|---|
| author | Shuai Zhang Yu Wan Weijie Yuan Yaoxiang Zhang Ziyuan Zhou Min Zhang Luzhen Wang Ran Wang |
| author_facet | Shuai Zhang Yu Wan Weijie Yuan Yaoxiang Zhang Ziyuan Zhou Min Zhang Luzhen Wang Ran Wang |
| author_sort | Shuai Zhang |
| collection | DOAJ |
| description | Hydrogels are highly hydrophilic polymers that have been used in a wide range of applications. In this study, we prepared PVA–CS/SA–Ca<sup>2+</sup> core–shell hydrogels with bilayer space by cross-linking PVA and CS to form a core structure and chelating SA and Ca<sup>2+</sup> to form a shell structure to achieve multiple substance loading and multifunctional expression. The morphology and structure of core–shell hydrogels were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The factors affecting the swelling properties of the hydrogel were studied. The results show that the PVA–CS/SA–Ca<sup>2+</sup> hydrogel has obvious core and shell structures. The SA concentration and SA/Ca<sup>2+</sup> cross-linking time show a positive correlation with the thickness of the shell structure; the PVA/CS mass ratio affects the structural characteristics of the core structure; and a higher CS content indicates the more obvious three-dimensional network structure of the hydrogel. The optimal experimental conditions for the swelling degree of the core–shell hydrogel were an SA concentration of 5%; an SA/Ca<sup>2+</sup> cross-linking time of 90 min; a PVA/CS mass ratio of 1:0.7; and a maximum swelling degree of 50 g/g. |
| first_indexed | 2024-03-10T03:24:05Z |
| format | Article |
| id | doaj.art-7725d00a3d5f4bcda3b3232744fc76c1 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T03:24:05Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-7725d00a3d5f4bcda3b3232744fc76c12023-11-23T12:11:29ZengMDPI AGPolymers2073-43602022-01-0114121210.3390/polym14010212Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell StructureShuai Zhang0Yu Wan1Weijie Yuan2Yaoxiang Zhang3Ziyuan Zhou4Min Zhang5Luzhen Wang6Ran Wang7Experimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, ChinaExperimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, ChinaExperimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, ChinaExperimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, ChinaExperimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, ChinaExperimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, ChinaQinghai Provincial Investigation, Design &Research Institute of Water Conservancy & Hydropower Co., Ltd., Xining 810000, ChinaExperimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, ChinaHydrogels are highly hydrophilic polymers that have been used in a wide range of applications. In this study, we prepared PVA–CS/SA–Ca<sup>2+</sup> core–shell hydrogels with bilayer space by cross-linking PVA and CS to form a core structure and chelating SA and Ca<sup>2+</sup> to form a shell structure to achieve multiple substance loading and multifunctional expression. The morphology and structure of core–shell hydrogels were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The factors affecting the swelling properties of the hydrogel were studied. The results show that the PVA–CS/SA–Ca<sup>2+</sup> hydrogel has obvious core and shell structures. The SA concentration and SA/Ca<sup>2+</sup> cross-linking time show a positive correlation with the thickness of the shell structure; the PVA/CS mass ratio affects the structural characteristics of the core structure; and a higher CS content indicates the more obvious three-dimensional network structure of the hydrogel. The optimal experimental conditions for the swelling degree of the core–shell hydrogel were an SA concentration of 5%; an SA/Ca<sup>2+</sup> cross-linking time of 90 min; a PVA/CS mass ratio of 1:0.7; and a maximum swelling degree of 50 g/g.https://www.mdpi.com/2073-4360/14/1/212core–shell structurehydrogeldouble loadresponse surface |
| spellingShingle | Shuai Zhang Yu Wan Weijie Yuan Yaoxiang Zhang Ziyuan Zhou Min Zhang Luzhen Wang Ran Wang Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell Structure Polymers core–shell structure hydrogel double load response surface |
| title | Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell Structure |
| title_full | Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell Structure |
| title_fullStr | Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell Structure |
| title_full_unstemmed | Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell Structure |
| title_short | Preparation of PVA–CS/SA–Ca<sup>2+</sup> Hydrogel with Core–Shell Structure |
| title_sort | preparation of pva cs sa ca sup 2 sup hydrogel with core shell structure |
| topic | core–shell structure hydrogel double load response surface |
| url | https://www.mdpi.com/2073-4360/14/1/212 |
| work_keys_str_mv | AT shuaizhang preparationofpvacssacasup2suphydrogelwithcoreshellstructure AT yuwan preparationofpvacssacasup2suphydrogelwithcoreshellstructure AT weijieyuan preparationofpvacssacasup2suphydrogelwithcoreshellstructure AT yaoxiangzhang preparationofpvacssacasup2suphydrogelwithcoreshellstructure AT ziyuanzhou preparationofpvacssacasup2suphydrogelwithcoreshellstructure AT minzhang preparationofpvacssacasup2suphydrogelwithcoreshellstructure AT luzhenwang preparationofpvacssacasup2suphydrogelwithcoreshellstructure AT ranwang preparationofpvacssacasup2suphydrogelwithcoreshellstructure |