Influences of support layer hydrophilicity on morphology and performances of polyamide thin-film composite membrane

Xu, Ruizhang; Gao, Feng; Wu, Yunqi; Ding, Lei; Chen, Dandan; Li, Tianyu; Yu, Ying; Zhuo, Weiling; Chen, Zhouyun; Zhang, Yunchu; Sun, Yiying; Yang, Feng; Chen, Jinyao; Cao, Ya; Kang, Jian; Zheng, Zhuo; Xiang, Ming

doi:10.1016/j.seppur.2021.119884

Cited by 21 publications

(6 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As hydrolysis is carried out, the ENF support attains a superhydrophilic state. This transformation, coupled with the smaller pore sizes, creates conditions that are conducive to forming the PA layer predominantly at the membrane surface [ 55 , 56 ]. The hydrophilic ENF support enables the slow MPD migration toward the reaction platform to react with the TMC solution, and with a small support pore size, the absorbed MPD remains trapped inside it [ 52 ].…”

Section: Resultsmentioning

confidence: 99%

Evaluating Post-Treatment Effects on Electrospun Nanofiber as a Support for Polyamide Thin-Film Formation

Augusty,

Rangkupan,

Klaysom

2024

Polymers

View full text Add to dashboard Cite

Poly(acrylonitrile-co-methyl acrylate) (PAN-co-MA) electrospun nanofiber (ENF) was used as the support for the formation of polyamide (PA) thin films. The ENF support layer was post-treated with heat-pressed treatment followed by NaOH hydrolysis to modify its support characteristics. The influence of heat-pressed conditions and NaOH hydrolysis on the support morphology and porosity, thin-film formation, surface chemistry, and membrane performances were investigated. This study revealed that applying heat-pressing followed by hydrolysis significantly enhances the physicochemical properties of the support material and aids in forming a uniform polyamide (PA) thin selective layer. Heat-pressing effectively densifies the support surface and reduces pore size, which is crucial for the even formation of the PA-selective layer. Additionally, the hydrolysis of the support increases its hydrophilicity and decreases pore size, leading to higher sodium chloride (NaCl) rejection rates and improved water permeance. When compared with membranes that underwent only heat-pressing, those treated with both heat-pressing and hydrolysis exhibited superior separation performance, with NaCl rejection rates rising from 83% to 98% while maintaining water permeance. Moreover, water permeance was further increased by 29% through n-hexane-rinsing post-interfacial polymerization. Thus, this simple yet effective combination of heat-pressing and hydrolysis presents a promising approach for developing high-performance thin-film nanocomposite (TFNC) membranes.

show abstract

Section: Resultsmentioning

confidence: 99%

Evaluating Post-Treatment Effects on Electrospun Nanofiber as a Support for Polyamide Thin-Film Formation

Augusty,

Rangkupan,

Klaysom

2024

Polymers

View full text Add to dashboard Cite

show abstract

“…All nonisothermal curing kinetics experiments were carried out with a differential scanning calorimeter (DSC3+, Mettler Toledo Corp., Switzerland) under a nitrogen flow of 50 mL/min. The standard procedure for each test is as follows: 5–8 mg of the sample was heated to 300 °C at different heating rates of 5, 10, 15, and 20 °C/min, respectively, and the heating curves were recorded …”

Section: Methodsmentioning

confidence: 99%

“…The standard procedure for each test is as follows: 5–8 mg of the sample was heated to 300 °C at different heating rates of 5, 10, 15, and 20 °C/min, respectively, and the heating curves were recorded. 32 …”

Section: Methodsmentioning

confidence: 99%

Effects of Silicon Dioxide/Graphene Oxide Hybrid Modification on Curing Kinetics of Epoxy Resin

Gou¹,

Song²,

Wu³

et al. 2022

ACS Omega

View full text Add to dashboard Cite

In this study, SiO 2 -grafted graphene oxide (GO-SiO 2 ) was prepared using the oxygen-containing group on the GO surface as the active site of the reaction. The chemical structure, morphology, and particle size of GO and GO-SiO 2 were carefully investigated by Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetry, transmission electron microscopy, scanning electron microscopy, and atomic force microscopy, and the results proved that the grafting modification was successful. Furthermore, epoxy (EP)/GO composites were prepared, and the effects of unmodified GO and GO-SiO 2 on the curing kinetics of EP were comparatively studied by differential scanning calorimetry (DSC). The results showed that, compared with neat EP and EP/GO, GO-SiO 2 significantly reduces the curing temperature of the composites, indicating that GO-SiO 2 has a more significant catalytic effect on the curing process of EP. The calculation results of the Kissinger method showed that the curing activation energy of EP/GO-SiO 2 is obviously lower than that of EP/GO and neat EP. Results of the Ozawa method showed that the introduction of GO-SiO 2 reduces the curing activation energy during the whole curing process, and in the middle and late stages of curing (α = 0.5−1) can significantly reduce the curing activation energy. The related mechanism has been proposed.

show abstract

“…A smaller water contact angle indicates better hydrophilicity, indicating that the membrane is more easily wetted by aqueous phase solution, which is benecial for IP. 27,28 Referring to Fig. 8(a), the surface water contact angle data of the PVDF-CTFE porous membranes modied with different amounts of N-MG showed that the addition of N-MG, which contained abundant hydroxyl groups, led to an overall decrease in the contact angle.…”

Section: Comprehensive Performance Of Modied Substrate Membranementioning

confidence: 99%

Preparation of N-MG-modified PVDF-CTFE substrate composite nanofiltration membrane and its selective separation of salt and dye

Pan,

et al. 2024

RSC Adv.

View full text Add to dashboard Cite

show abstract

Influences of support layer hydrophilicity on morphology and performances of polyamide thin-film composite membrane

Cited by 21 publications

References 53 publications

Evaluating Post-Treatment Effects on Electrospun Nanofiber as a Support for Polyamide Thin-Film Formation

Evaluating Post-Treatment Effects on Electrospun Nanofiber as a Support for Polyamide Thin-Film Formation

Effects of Silicon Dioxide/Graphene Oxide Hybrid Modification on Curing Kinetics of Epoxy Resin

Preparation of N-MG-modified PVDF-CTFE substrate composite nanofiltration membrane and its selective separation of salt and dye

Contact Info

Product

Resources

About