Thermally induced phase separation followed by in situ sol–gel process: A novel method for PVDF/SiO2 hybrid membranes

2014 ◽  
Vol 465 ◽  
pp. 56-67 ◽  
Author(s):  
Hong-Qing Liang ◽  
Qing-Yun Wu ◽  
Ling-Shu Wan ◽  
Xiao-Jun Huang ◽  
Zhi-Kang Xu
Keyword(s):  
Phase Separation ◽  
Sol Gel ◽  
Hybrid Membranes ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
Sol Gel Process ◽  
Novel Method

scholarly journals Synchrotron X-ray In Situ Tomography of Thermally Induced Phase Separation of Polylactic Acid in 1,4-Dioxane Solution

2018 ◽  
Vol 18 (12) ◽  
pp. 7496-7503 ◽  
Author(s):  
Swann Gay ◽  
Brice Calvignac ◽  
Landry Ouanssi Kamtcheu ◽  
Thomas Beuvier ◽  
Elodie Boller ◽  
...  
Keyword(s):  
Phase Separation ◽  
Polylactic Acid ◽  
Dioxane Solution ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
X Ray

Study on Poly(ether imide)/Amino-Modified Sillica Hybrid Membranes

2014 ◽  
Vol 789 ◽  
pp. 218-223
Author(s):  
Ying Chen ◽  
Jun Fen Sun
Keyword(s):  
Mechanical Properties ◽  
Pure Water ◽  
Sol Gel ◽  
Morphological Structure ◽  
Hybrid Membranes ◽  
Water Contact ◽  
Sol Gel Process ◽  
And Performance ◽  
Field Emission Electron Microscopy

Poly (ether imide) (PEI) membrane with many good properties, such as chemical resistance, biocompatibility, good thermal, and mechanical properties, has been widely used in filtration and biomedical applications. SiO2particles containing amine groups can be a good enzyme immobilization carrier. Organic-inorganic hybrids of poly (ether imide) and amino-modified SiO2were in situ prepared via sol-gel process in the presence of tetraethylortho silicate (TEOS) in a mixed solvent of N, N-Dimethylacetamide/1-Methyl-2-pyrrolidone (DMAc/NMP). The effects of casting solution composition on the membrane morphological structure and performance were investigated. The dispersion of the inorganic and organic phase in the nanoscale was possible with addition of (3-aminopropyl) triethoxysilane (APTES) as shown by field emission electron microscopy. Membranes with different ratio of APTES/TEOS have quite different properties. Mechanical properties evaluation such as rupture elongation ration and tensile strength tests of the hybrid membranes were carried out. Fourier transform infrared spectroscopy (FTIR), pure water fluxes and water contact angle of the hybrid membranes were also characterized. The results show that poly (ether imide)/amino-modified SiO2hybrid membranes have high static adsorption capacity for lysozyme (Lys). Moreover, mechanical properties of the hybrid membranes greatly improve compared to pure PEI membranes.

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