Journal of Inorganic Materials, Volume. 35, Issue 12, 1333(2020)
Figures & Tables(11)
1. SEM images of dual-layer hollow fiber and single-layer hollow fiber Cross-section morphologies of (a, b) dual-layer hollow fiber precursor, (c, d) dual-layer hollow fiber, (e, f) 1 μm single-layer hollow fiber; SEM images of the surface morphology: (g) dual-layer hollow fiber, (h) 1 μm single-layer hollow fiber
2. XRD patterns of dual-layer hollow fiber membranes with different TiO2 contents
3. SEM images of dual-layer hollow fiber membranes with different Al2O3/PESf mass ratios in outer suspension (a) 2.75; (b) 4.33; (c) 5.60; (d) 7.50; (e) 13.3
4. Influence of Al2O3/PESf mass ratio in outer suspension on pore size distribution of dual-layer hollow fiber membranes
5. SEM images of dual-layer hollow fiber membrane of alumina sintered at different temperatures (a)1250 ℃, (b)1300 ℃, (c) 1350 ℃, (d)1400 ℃
Table 1. Suspension composition of dual-layer hollow fiber membrane/wt%
View tableView in ArticleTable 1. Suspension composition of dual-layer hollow fiber membrane/wt%
Suspension composition Inner layer Outer layer Solvent (NMP) 33.34 37.81 Al2O3 (1 μm) 55.35 / Al2O3 (300 nm) / 49.15 Polymer (PESf) 9.77 11.34 Additive (PVP) 1.54 1.70
Table 2. Comparison of properties between single-layer and dual-layer hollow fiber membranes
View tableView in ArticleTable 2. Comparison of properties between single-layer and dual-layer hollow fiber membranes
Property η /%Fracture load/N Pure water flux/(m3‧m-2‧h-1) Porosity/% Average pore size/μm R TOC/%Single-layer (1 μm) 13.0 9 3.52 51.57 0.70 95.4 Single-layer (300 nm) 16.9 19 0.86 48.20 0.13 98.4 Dual-layer (1 μm/300 nm) 14.3 12 2.30 50.89 0.24 97
Table 3. Influence of TiO2 content on properties of dual-layer hollow fiber membranes
View tableView in ArticleTable 3. Influence of TiO2 content on properties of dual-layer hollow fiber membranes
TiO2 content/wt% η /%Fracture load/N Pure water flux/ (m3‧m-2‧h-1) Porosity/% Average pore size/μm 0 14.3 12 2.30 50.89 0.240 2 14.9 24 1.65 48.05 0.152 5 14.9 22 1.32 49.97 0.147 10 15.2 20 1.21 46.43 0.150 15 15.3 19 1.12 45.68 0.145 20 16.3 17 0.91 43.90 0.141
Table 4. Influence of Al2O3/PESf mass ratio in outer suspension on properties of dual-layer hollow fiber membranes
View tableView in ArticleTable 4. Influence of Al2O3/PESf mass ratio in outer suspension on properties of dual-layer hollow fiber membranes
Al2O3/PESf Outer suspension viscosity/cP Fracture load/N Pure water flux/ (m3‧m-2‧h-1) Porosity/ % Mean pore size/μm R TOC/%2.75 7320 21 1.99 49.90 0.180 97.3 4.33 8580 22 1.10 52.26 0.175 97.5 5.60 9720 23 1.41 53.91 0.130 97.5 7.50 11020 25 1.08 53.31 0.125 97.6 13.30 58300 23 0.48 52.54 0.115 97.8
Table 5. Influence of sintering temperature on the properties of dual-layer hollow fiber membranes
View tableView in ArticleTable 5. Influence of sintering temperature on the properties of dual-layer hollow fiber membranes
Temperature/℃ Fracture load/N Pure water flux/(m3‧m-2‧h-1) Porosity/% Average pore size/μm R TOC/%1250 11 3.23 61.97 0.235 96.7 1300 15 2.34 55.62 0.199 97.4 1350 24 1.20 48.88 0.150 97.5 1400 37 0.26 40.33 0.126 98.3
Table 6. Comparison in properties of different hollow fiber ceramic membranes
View tableView in ArticleTable 6. Comparison in properties of different hollow fiber ceramic membranes
Membranes Sintering temperature/℃ Average pore size/μm Pure water flux/ (m3‧m-2‧h-1) Bending strength/MPa Fracture load/N Ref. Single-Channel Al2O3 hollow fiber 1455 0.10 0.664 88.2 - [ 28 ]Single-Channel Al2O3 hollow fiber 1500 0.75 1.280 85.8 - [ 29 ]4-Channel Al2O3 hollow fiber 1500 1.20 2.710 - 22 [ 25 ]7-Channel Al2O3 hollow fiber 1350 0.183 1.070 - 14 [ 30 ]7-Channel YSZ/Al2O3 hollow fiber 1400 230.00 1.640 - 14 [ 31 ]4-Channel 1 μm/300 nm Al2O3 hollow fiber 1350 0.15 1.260 - 24 This work
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Jinyun LIU, Yuting ZHANG, Zhou HONG, Hua LIU, Shengxian WANG, Xuehong GU.
Paper Information
Category: RESEARCH PAPER
Received: Apr. 7, 2020
Accepted: --
Published Online: Mar. 10, 2021
The Author Email: GU Xuehong (Xhgu@njtech.edu.cn)
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