Electrospun bio-polymeric nanofibrous membrane for membrane distillation desalination application

被引：10

作者：

Aijaz, Muhammad Omer ^{[1
]}

Othman, Mohd Hafiz Dzarfan ^{[1
]}

Karim, Mohammad Rezaul ^{[2
]}

Khan, Asmat Ullah ^{[1
]}

Najib, Abdullah ^{[3
]}

Assaifan, Abdulaziz K. ^{[4
]}

Alharbi, Hamad F. ^{[3
]}

Alnaser, Ibrahim Abdullah ^{[2
]}

Puteh, Mohd Hafiz ^{[1
,5
]}

机构：

[1] Univ Teknol Malaysia, Fac Chem & Energy Engn, Adv Membrane Technol Res Ctr AMTEC, Utm Skudai 81310, Johor, Malaysia

[2] King Saud Univ, Ctr Excellence Res Engn Mat CEREM, Deanship Sci Res DSR, Riyadh 11421, Saudi Arabia

[3] King Saud Univ, Coll Engn, Dept Mech Engn, Riyadh 11421, Saudi Arabia

[4] King Saud Univ, Coll Appl Med Sci, Biomed Technol Dept, Riyadh 12372, Saudi Arabia

[5] Univ Teknol Malaysia, Fac Civil Engn, Utm Skudai 81310, Johor, Malaysia

来源：

DESALINATION | 2024年 / 586卷

关键词：

Electrospinning; Biopolymer; Nanofibrous membrane; Polylactic acid; Membrane distillation desalination; Heat treatment; Hierarchical structure; AIR-GAP MEMBRANE; LAYER; WATER; FIBERS;

D O I：

10.1016/j.desal.2024.117825

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Polylactic acid (PLA) has been explored as a sustainable material for membrane distillation (MD) membranes using electrospinning for the first time. Adjusting the electrospinning parameters of PLA nanofiber, such as concentration, voltage, collector distance, humidity, and flow rate, resulted in uniformly distributed and smaller nanofibrous structures. Heat treatments were also performed to enhance the tackiness and fusibility of the fibers within the nanofibrous structure, optimizing the pore size, hydrophobicity, and surface roughness of the PLA membranes. The hierarchical structure of the PLA membranes improved the liquid entry pressure (LEP) and mechanical strength by 320 % and 230 %, respectively. The membrane characteristics were assessed in terms of porosity, pore size, surface roughness, and contact angle, which determined the impact of the wettability of the membrane under different conditions. The results showed that under certain constraints, PLA membranes could be effectively used in the air gap membrane distillation (AGMD) process, achieving a permeated flux of similar to 2 kg/m(2)h and a salt rejection of 99 %. However, PLA-based nanofibrous membranes are unsuitable for MD applications at feed temperatures above 60 degrees C and a flow rate of 60 LHP. This study provides a strong basis for developing and manufacturing eco-friendly bio-based nanofibers materials for desalinating saltwater.

引用

页数：17

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