Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane

doi:10.1016/j.cjche.2018.12.004

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (5): 1058-1066.DOI: 10.1016/j.cjche.2018.12.004

• Separation Science and Engineering • Previous Articles Next Articles

Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane

Na Tang^1,2, Xinxin Hua^1,2, Zhao Li^1,2, Lei Zhang^1,2, Jiating Wang¹, Jun Xiang^1,2, Penggao Cheng^1,2, Xuekui Wang^1,2

1 College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin 300457, China;
2 Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science & Technology, Tianjin 300457, China

Received:2018-08-28 Revised:2018-12-05 Online:2019-06-27 Published:2019-05-28
Contact: Lei Zhang
Supported by:
Supported by the Natural Science Foundation of Tianjin (18JCZDJC37200), the State Key Laboratory of Separation Membranes and Membrane Processes of Tianjin Polytechnic University (M2-201610), the Tianjin higher school innovation team training program (TD13-5008), the Yangtze Scholars and Innovative Research Team in University (IRT-17R81) and the Innovative Research Team of Tianjin Municipal Education Commission (TD12-5004).

Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane

Na Tang^1,2, Xinxin Hua^1,2, Zhao Li^1,2, Lei Zhang^1,2, Jiating Wang¹, Jun Xiang^1,2, Penggao Cheng^1,2, Xuekui Wang^1,2

1 College of Chemical Engineering and Materials Science, Tianjin University of Science & Technology, Tianjin 300457, China;
2 Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science & Technology, Tianjin 300457, China

通讯作者: Lei Zhang
基金资助:
Supported by the Natural Science Foundation of Tianjin (18JCZDJC37200), the State Key Laboratory of Separation Membranes and Membrane Processes of Tianjin Polytechnic University (M2-201610), the Tianjin higher school innovation team training program (TD13-5008), the Yangtze Scholars and Innovative Research Team in University (IRT-17R81) and the Innovative Research Team of Tianjin Municipal Education Commission (TD12-5004).

Abstract

Abstract: Membranes were fabricated with high-density polyethylene (HDPE) and ethylene vinyl acetate (EVA) blend through thermally induced phase separation and were then used for vacuum membrane distillation (VMD). The membranes were supported by nonwoven polyester fabric with a special cellular structure. Different membrane samples were obtained by adjusting the polymer concentration, HDPE/EVA weight ratio, and coagulation bath temperature. The membranes were characterized by scanning electron microscopy (SEM) analysis, contact angle test, and evaluation of porosity and pore size distribution. A series of VMD tests were conducted using aqueous NaCl solution (0.5 mol·L^-1) at a feed temperature of 65℃ and permeate side absolute pressure of 3 kPa. The membranes showed excellent performance in water permeation flux, salt rejection, and long-term stability. The HDPE/EVA co-blending membranes exhibited the largest permeation flux of 23.87 kg·m^-2·h^-1 and benign salt rejection of ≥ 99.9%.

Key words: Thermally induced phase separation, High-density polyethylene, Ethylene vinyl acetate, Membrane, Separation, Microstructure

摘要： Membranes were fabricated with high-density polyethylene (HDPE) and ethylene vinyl acetate (EVA) blend through thermally induced phase separation and were then used for vacuum membrane distillation (VMD). The membranes were supported by nonwoven polyester fabric with a special cellular structure. Different membrane samples were obtained by adjusting the polymer concentration, HDPE/EVA weight ratio, and coagulation bath temperature. The membranes were characterized by scanning electron microscopy (SEM) analysis, contact angle test, and evaluation of porosity and pore size distribution. A series of VMD tests were conducted using aqueous NaCl solution (0.5 mol·L^-1) at a feed temperature of 65℃ and permeate side absolute pressure of 3 kPa. The membranes showed excellent performance in water permeation flux, salt rejection, and long-term stability. The HDPE/EVA co-blending membranes exhibited the largest permeation flux of 23.87 kg·m^-2·h^-1 and benign salt rejection of ≥ 99.9%.

关键词: Thermally induced phase separation, High-density polyethylene, Ethylene vinyl acetate, Membrane, Separation, Microstructure

Na Tang, Xinxin Hua, Zhao Li, Lei Zhang, Jiating Wang, Jun Xiang, Penggao Cheng, Xuekui Wang. Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane[J]. Chinese Journal of Chemical Engineering, 2019, 27(5): 1058-1066.

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Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane

Effect of ethylene vinyl acetate content on the performance of VMD using HDPE co-blending membrane

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