Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite Membranes
Poly-(vinylidene fluoride) (PVDF), which has a low surface energy, is a common material used for ultrafiltration (UF) membranes. Bacterial cellulose (BC) contains a large number of hydroxyl groups, which has a strong water holding capacity. It can improve the hydrophilicity of PVDF. By means of in-s...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2014-10-01
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| Series: | BioResources |
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| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_6924_Zhao_Yu_Bacterial_Cellulose_Silica_Hybrid |
| _version_ | 1828156745775579136 |
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| author | Zinian Zhao Shanshan Yu |
| author_facet | Zinian Zhao Shanshan Yu |
| author_sort | Zinian Zhao |
| collection | DOAJ |
| description | Poly-(vinylidene fluoride) (PVDF), which has a low surface energy, is a common material used for ultrafiltration (UF) membranes. Bacterial cellulose (BC) contains a large number of hydroxyl groups, which has a strong water holding capacity. It can improve the hydrophilicity of PVDF. By means of in-situ composite preparation, with the introduction of tetraethoxysilane (TEOS) as silicon source from the outside of BC and polymerizing, hybrid reinforcing material comprised of BC and silica (BC/SiO2) was achieved which were catalyzed by different acids. After that, by means of a phase separation method with PVDF, composite membranes (PVDF/BC/SiO2) were prepared. Visible spectrophotometry, thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) were used to investigate the characteristic of BC/SiO2 hybrids. The structure and properties of composite membranes were also investigated. After catalysis by acid, SiO2 particles uniformly adhered to the surface of BC fibers, which resulted in small pores being formed preferentially in the interface of PVDF composite membranes, while reducing the finger-like pores. At the same time the retention of the composite membranes were improved. So both the properties and structure were improved due to the presence of certain BC/SiO2 hybrid reinforcements. |
| first_indexed | 2024-04-11T23:16:26Z |
| format | Article |
| id | doaj.art-4d797ed07f614bdd8c6bca0a29641062 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-04-11T23:16:26Z |
| publishDate | 2014-10-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-4d797ed07f614bdd8c6bca0a296410622022-12-22T03:57:36ZengNorth Carolina State UniversityBioResources1930-21261930-21262014-10-01946924693710.15376/biores.9.4.6924-6937Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite MembranesZinian Zhao0Shanshan Yu1College of Material Science and Chemical Engineering, Tianjin University of Science and Technology; ChinaCollege of Material Science and Chemical Engineering, Tianjin University of Science and Technology; ChinaPoly-(vinylidene fluoride) (PVDF), which has a low surface energy, is a common material used for ultrafiltration (UF) membranes. Bacterial cellulose (BC) contains a large number of hydroxyl groups, which has a strong water holding capacity. It can improve the hydrophilicity of PVDF. By means of in-situ composite preparation, with the introduction of tetraethoxysilane (TEOS) as silicon source from the outside of BC and polymerizing, hybrid reinforcing material comprised of BC and silica (BC/SiO2) was achieved which were catalyzed by different acids. After that, by means of a phase separation method with PVDF, composite membranes (PVDF/BC/SiO2) were prepared. Visible spectrophotometry, thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) were used to investigate the characteristic of BC/SiO2 hybrids. The structure and properties of composite membranes were also investigated. After catalysis by acid, SiO2 particles uniformly adhered to the surface of BC fibers, which resulted in small pores being formed preferentially in the interface of PVDF composite membranes, while reducing the finger-like pores. At the same time the retention of the composite membranes were improved. So both the properties and structure were improved due to the presence of certain BC/SiO2 hybrid reinforcements.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_6924_Zhao_Yu_Bacterial_Cellulose_Silica_HybridBacterial celluloseBC/SiO2 hybridsComposite MembranesPVDFWater fluxRetention |
| spellingShingle | Zinian Zhao Shanshan Yu Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite Membranes BioResources Bacterial cellulose BC/SiO2 hybrids Composite Membranes PVDF Water flux Retention |
| title | Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite Membranes |
| title_full | Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite Membranes |
| title_fullStr | Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite Membranes |
| title_full_unstemmed | Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite Membranes |
| title_short | Bacterial Cellulose and Silica Hybrid Reinforcements in Poly-(vinylidene fluoride) Composite Membranes |
| title_sort | bacterial cellulose and silica hybrid reinforcements in poly vinylidene fluoride composite membranes |
| topic | Bacterial cellulose BC/SiO2 hybrids Composite Membranes PVDF Water flux Retention |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_09_4_6924_Zhao_Yu_Bacterial_Cellulose_Silica_Hybrid |
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