期刊
ENVIRONMENTAL TECHNOLOGY
卷 -, 期 -, 页码 -出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2022.2099306
关键词
Cellulose acetate; desalination; FO; mixed matrix membrane; UiO-66-NH2
资金
- National Natural Science Foundation of China [21777055]
- Natural Science Foundation of Shandong Province [ZR2018LB026, ZR2020MB120, ZR2021MB063]
- Shandong Province Key Research and Development Plan [2018GGX102032, 2019GSF109116]
- Project of Shandong Province Higher Educational Science and Technology Program [2018LS007]
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse [2019KF09]
By introducing UiO-66-NH2 into cellulose acetate forward osmosis membrane, the water permeability and selectivity of the membrane can be improved. UiO-66-NH2 has the potential advantage as an additive for enhancing the desalination performance of forward osmosis membranes.
In this paper, the hydrophilic UiO-66-NH2 nanomaterial was synthesized by the solvent-thermal method and characterized. Then, UiO-66-NH2 was introduced into the casting membrane solution of cellulose acetate (CA) forward osmosis (FO) membrane, and CA/UiO-66-NH2 forward osmosis membrane was prepared by the phase inversion method. The optimum preparation conditions of CA/UiO-66-NH2 mixed matrix membranes were determined as follows: the content of UiO-66-NH2 was 0.4 wt%, the coagulation bath temperature was 35 degrees C, the mixing temperature was 50 degrees C and the heat treatment temperature was 50 degrees C. FTIR, SEM, water contact angle and AFM were carried out on CA/UiO-66-NH2 forward osmosis membrane prepared under the best preparation conditions. Compared to the CA forward osmosis membrane, the permeability and selectivity of the CA/UiO-66-NH2 membrane were improved. The water flux and reverse salt flux of the CA/UiO-66-NH2 forward osmosis membrane reached 52.32 L/(m(2)center dot h) and 2.43 g/(m(2)center dot h), respectively. The permeability selectivity of CA membranes and CA/UiO-66-NH2 membranes did not change much during 180 min, indicating that the two membranes had good long-term stability. This study shows a potential advantage of UiO-66-NH2 as additives for improvement in the desalination performance of forward osmosis membranes.
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