Superwetting Polypropylene Nonwoven Fabrics Modified by a Catechol-Based Biomimetic Strategy for Oil/Water Separation

Li, Jing; Sun, Yining; Yang, Xiaodong; Fu, Zhuan; Zhu, Xiangxiang; Sun, Hui; Yu, Bin

doi:10.1021/acsapm.3c02382

Cited by 4 publications

(10 citation statements)

References 56 publications

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“…47 The formation mechanism of CK-codeposited coatings has been discussed in our previous studies. 49 No significant decrease in the peak strengths of O 1s, N 1s, and Si on the C2K4-Fe shows that the C2K4-codeposited coating has good stability in the incubation solution, consistent with the results of SEM. C2K4-Fe has a Fe 2p peak (709.4 eV), and the content of the Fe element is 1.53 atom %.…”

Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)supporting

confidence: 76%

“…The above confirms that CA and KH550 had successfully formed a coating on the surface of PP nonwoven fabrics. 47,49 A broad peak appears at 3000−3500 cm −1 of PP-CK and PP-(CK-Fe), which belongs to adsorbed water, hydroxyl, or amino groups. 32,53,54 To characterize the changes in amino groups on the coating before and after incubation, we used the classical ninhydrin color test.…”

Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)mentioning

confidence: 99%

“…Si atom % increases in C2K1−C2K3 but decreases in C2K4−C2K5. It is speculated that Fe 3+ first coordinates with catechol groups on the CK coating during the incubation process 49 and as "seeds" to grow iron-based oxides.…”

Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)mentioning

confidence: 99%

“…In a codeposition system, CA and KH550 were connected by covalent bonds via Michael addition and Schiff base reactions to form a stable CK coating. 49 The CK coating has abundant exposure −OH and C�O (derived from CA) and −NH 2 (derived from KH550). In the incubation, the phenolic hydroxyl group first coordinated with Fe 3+ and anchored the iron ion as dispersed nucleation sites.…”

Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)mentioning

confidence: 99%

“…48 Our previous study found that CA and KH550 can form a thicker deposition layer on polypropylene nonwovens, effectively improving nonwovens' hydrophilicity. 49 In addition, the catechol group on the coating can coordinate with Fe 3+ to further increase the stability of the coating. Herein, we used the secondary reactivity of the CA-KH550 coating to prepare a dye sorbent with a large-capacity adsorbent.…”

Section: Introductionmentioning

confidence: 99%

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Iron-Based Oxides Anchored on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Anionic Dyes

Li,

Sun,

Yang

et al. 2024

ACS Appl. Polym. Mater.

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The dopamine modification strategy has received extensive attention in water treatment due to its simple and gentle preparation process, excellent adhesion, and good secondary reactivity. Further research has found that compounds containing the catechol groups can react with the amino-containing silane coupling agents under mild conditions to form dopamine-like hydrophilic coatings on the surface of hydrophobic membranes or fibers. This paper used cheap polypropylene melt-blown nonwovens as the substrate to prepare a large-capacity dye adsorbent PP-(CK-Fe). Specifically, catechol (CA) and (3-aminopropyl) triethoxysilane (KH550) were used to form a codeposited coating on the substrate. Then, we used the secondary reactivity of the coating to grow iron-based oxides in situ. The adsorbent had good adsorption performance on anionic dyes at the initial pH of the dye solution, including Orange II (380 mg/g), methyl orange (268 mg/g), Congo red (294 mg/g), and carmine (263 mg/g). However, it had almost no adsorption effect on cationic dyes at the initial pH, including methylene blue and Rhodamine B. We chose Orange II to explore the possible adsorption mechanism. The results confirmed that the adsorbent had good adsorption performance at pH 3−11. The adsorption process tended to be monolayer chemical adsorption. The maximum adsorption capacity (Q max ) of Orange II was 515.46 mg/g under optimal conditions. This study also confirmed that the codeposition coating constructed with polyphenol and amino-containing silane coupling agents had a secondary reactivity similar to the dopamine coating.

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Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)supporting

confidence: 76%

Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)mentioning

confidence: 99%

Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)mentioning

confidence: 99%

Section: Physicochemical Characterization Of Pp-ck and Pp-(ck-fe)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Iron-Based Oxides Anchored on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Anionic Dyes

Li,

Sun,

Yang

et al. 2024

ACS Appl. Polym. Mater.

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In Situ Preparation of MnO₂ on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Cationic Dyes

Li,

Sun,

Zhang

et al. 2024

Langmuir

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Previous studies have confirmed that MnO x removes heavy metal ions and organic pollutants from water with dual effects of adsorption and oxidation coupling, significantly improving the ability to remove impurities. Nanometal oxides have a highly reactive surface but tend to agglomerate during preparation and are challenging to recycle after use. A common method is to combine nano-MnO 2 with Fe 3 O 4 to prepare magnetic materials for easy recycling. Our previous research has confirmed that catechol (CA) and (3-aminopropyl) triethoxysilane (KH550) can be co-deposited on the surface of polypropylene nonwovens to form a stable CK coating under alkaline conditions. In addition, the coating has many active groups, including hydroxyl groups, amino groups, etc. This study further investigates the secondary reactivity of CK coatings. The coordination of catechol groups and metal ions was used to anchor manganese ions to the coating. Meanwhile, the hydroxyl and amino groups were used to reduce manganese ions to Mn 4+ in situ to prepare PP-(CK-MnO 2 ). We found that the sample had an excellent decolorization effect on cationic dyes but was limited to anionic dyes. The decolorization mechanism of cationic dyes was further discussed. The results showed that the decolorization of cationic dyes had a dual effect of adsorption and oxidative degradation. Under acidic conditions, its oxidation properties were enhanced. It can be used as a highly effective decolorizing agent for cationic dyes, and the decolorization behavior is consistent with the first-order kinetics. As the pH increases, its oxidation properties gradually decrease. Although the electrostatic adsorption effect was enhanced, the overall decolorization performance was significantly reduced. Recycling experiments have proved that it can maintain >90% removal rate after five cycles. This study also demonstrated that the CK coating has dopamine-like properties, which can coordinate with metal ions to prepare metal−organic hybrid materials.

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Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

Tian,

Liu,

et al. 2024

ACS Sustainable Chem. Eng.

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Developing a cost-effective, versatile, biodegradable, and biobased membrane is crucial for the sustainable treatment of complex wastewater. In this work, a multifunctional membrane was fabricated from polydopamine-modified waste paper (WP@PDA) and hydrothermal carbonized chitosan (HTCC), through simple vacuum filtration. This membrane demonstrated high efficiency in separating oil-in-water emulsions and allowed for the in situ dye removal under controllable pH conditions. The results showed that the as-prepared WP@PDA/HTCC membrane exhibited superhydrophilic, oil-resistant, and pH-tunable surface charge features. With the weight ratio of WP@PDA and HTCC of 6:2, it displayed optimal mechanical properties and structural stability in aqueous environments. As expected, the WP@PDA/HTCC membrane achieved outstanding performance in separating different oil-in-water emulsions at 0.05 bar followed by the satisfactory flux of approximately 2400 L m −2 h −1 bar −1 and separation efficiency of around 99.5%. Furthermore, the abundant functional groups on the WP@PDA and HTCC surface also endowed this membrane with a high removal capability for both cationic and anionic dyes. It can efficiently eliminate methyl orange (MO) and methylene blue (MEB) from dye-contaminated wastewater mainly through electrostatic interactions. Even after filtering 1550 L m −2 of MO and 1650 L m −2 of MEB simulated wastewater using WP@PDA/ HTCC membrane, its removal efficiencies toward both dyes remained above 90.0%. Interestingly, the WP@PDA/HTCC-1 membrane presented bidirectional controlled dye separation behaviors for the dye mixture under the suitable solution pH due to its pH-tunable surface charge feature. Most importantly, the as-prepared membrane showed excellent reusability and high resistance against harsh chemical corrosions without losing its properties. Therefore, the as-prepared WP@PDA/HTCC-1 membrane could be a promising material for complex wastewater treatment.

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Superwetting Polypropylene Nonwoven Fabrics Modified by a Catechol-Based Biomimetic Strategy for Oil/Water Separation

Cited by 4 publications

References 56 publications

Iron-Based Oxides Anchored on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Anionic Dyes

Iron-Based Oxides Anchored on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Anionic Dyes

In Situ Preparation of MnO₂ on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Cationic Dyes

Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

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Superwetting Polypropylene Nonwoven Fabrics Modified by a Catechol-Based Biomimetic Strategy for Oil/Water Separation

Cited by 4 publications

References 56 publications

Iron-Based Oxides Anchored on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Anionic Dyes

Iron-Based Oxides Anchored on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Anionic Dyes

In Situ Preparation of MnO2 on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Cationic Dyes

Construction of Waste Paper-Chitosan-Based Membranes with pH-Tunable Surface Charge for Efficient Separation of Oil-in-Water Emulsion and Dye

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In Situ Preparation of MnO₂ on the Catechol/Silane-Coated Polypropylene Nonwoven Fabrics for Effective Removal of Cationic Dyes