A Pd-anchored poly(vinyl chloride-<i>co</i>-maleic acid monoamide)/poly(vinyl chloride) ultrafiltration membrane for the efficient degradation of 4-nitrophenol

Sun, Dongcang; Song, Changtong; Zhang, Xianhong; Chen, Dong; Ma, Yuhong; Yang, Wantai

doi:10.1039/d2ma01027e

Cited by 3 publications

(2 citation statements)

References 49 publications

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“…As control, we subsequently carried out the batch copolymerization of VC and MA in n-hexane/ethanol (m n-hexane /m ethanol = 4/1) to evaluate the polymerization kinetic, chemical structure, number-average molecular weight (M n ), and copolymer composition. The analysis results of FTIR, 1 H NMR, and 13 C NMR (Figure 3a, and Figure S2) verified the successful synthesis of the PVMA copolymer. In the copolymer composition curve (Figure 2e), the copolymerization activity of MA is much higher than that of VC.…”

Section: Selection Of the Suitable Reaction Mediummentioning

confidence: 58%

“…Recently, the nonaqueous polymerization of VC, which was conducted in organic solvents as an alternative to water, attracted extensive attention in the preparation of PVC resin due to its remarkable advantages such as direct formation of solid polymeric particles and facile separation of polymer products. − Moreover, the overall energy consumption in a nonaqueous process is only about 60% of that in a conventional aqueous polymerization process, and virtually all the organic solvent can be fully recycled. Bao and co-workers reported the work on the nonaqueous polymerization of VC in n -butane using sorbitan monostearate and poly(vinyl alcohol) as suspending agents, in which PVC chains precipitate from a VC/ n -butane mixed medium to form primary aggregates at a very low polymerization conversion and primary aggregates aggregate to form the primary particles, which further aggregate to form the grains .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of a Vinyl Chloride-Methyl Acrylate Random Copolymer with Controllable Copolymer Composition and Its Processing Features in Rigid PVC

Wu,

Fan,

Song

et al. 2024

Ind. Eng. Chem. Res.

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The copolymers of vinyl chloride (VC) with acrylates are widely used as special resins in multiple fields such as coatings, adhesives, and polymer processing aids. Nevertheless, the controllability in the copolymer composition is still a challenge owing to the big gap in reactivity ratio. In this paper, we conducted the nonaqueous copolymerization of VC with methyl acrylate (MA) in a mixed organic solvent (hexane/ethanol) without any suspending agent or emulsifier and intended to regulate the copolymer composition by dropping MA in a continuous mode. The promising results showed that a powdery vinyl chloride-comethyl acrylate (PVMA) with ultralow number-average molecular weight (M n , 9000−11 000) and submicrometer size (0.2−0.5 μm) is synthesized successfully, which is highly different from those of conventional aqueous polymerizations such as suspension and emulsion. More interestingly, varied PVMA x (x represents the actual mass fraction of MA in the copolymer) with relatively uniform and narrow dispersity in copolymer compositions (x = 1.7 ± 0.4, 3.2 ± 0.5, 5 ± 0.7, and 8.2 ± 0.4%) are obtained during the whole polymerization stage. In the batch process, the content of MA units in the copolymer decreased significantly with the increase of monomer conversion. Subsequently, the PVMA copolymers were employed as processing aids in rigid PVC and exhibited unique features. Stemming from its low M n and the excellent compatibility with PVC matrix, the addition of PVMA can improve the plasticization efficiency significantly and thereby further enhance the mechanical performance. For instance, addition of 3 phr PVMA 8.3 in the rigid PVC system can shorten the plasticization time from 104 to 52 s, enhance the tensile strength from 65 to 74 MPa, and increase the elongation at break 2-fold in comparison to the controlled PVC. In summary, this study provides a novel polymerization technique and strategy for the preparation of a vinyl chloride based copolymer resin with a low M n and further composition control.

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Section: Selection Of the Suitable Reaction Mediummentioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Synthesis of a Vinyl Chloride-Methyl Acrylate Random Copolymer with Controllable Copolymer Composition and Its Processing Features in Rigid PVC

Wu,

Fan,

Song

et al. 2024

Ind. Eng. Chem. Res.

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A 5,5’‐Thiobis(thiazol‐2‐amine)‐based dithiocarbamate polymer: Straightforward synthesis and application in PVC membrane modification to enhance cadmium and dye removal

Kamali,

Haghani,

Fely

et al. 2024

J of Applied Polymer Sci

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A novel dithiocarbamate polymer (TTDP) derived from bis(2‐aminothiazole) sulfide was synthesized through a straightforward process. The synthesis involved the initial conversion of 2‐aminothiazole into its bis(sulfide), subsequent reaction with chloroacetyl chloride, and final copolymerization with disodium ethylene bisdithiocarbamate. TTDP boasts a high percentage of functional groups containing sulfur, nitrogen, and oxygen, contributing to its hydrophilicity, strong chelation capacity with metal cations, and compatibility with other polymers. Therefore, it was used as a strong candidate for making membranes in water media. According to this, TTDP was blended in ratios 1, 2, 5, and 10 wt% with polyvinyl chloride (PVC; 15 wt%), 2 wt% of polyethylene glycol 4000 in N,N‐dimethylacetamide as polymeric membranes for water‐based applications. The blended membranes were prepared using the casting and immersion precipitation method. The blended membrane showed high fluxes, up to 1052 L/m2 h for 2 wt% of TTDP (in comparison to the bare membrane's 459 L/m2h). Notably, they demonstrated an excellent protein solution flux of 222–269 L/m2 h at 3 bar with 96%–98% bovine serum albumin rejection. Furthermore, these membranes showed remarkable efficacy in removing cadmium ions (up to 98.96% for 5 and 10 wt% TTDP) and synthetic dye methyl orange (up to 84.03% for 2 wt% TTDP).

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Green Fabrication of Effective Silver Loading on Fishbone-Derived Hydroxyapatite: A Robust Catalyst for 4-Nitrophenol Reduction

Do,

Ho,

Phan

et al. 2024

Arab J Sci Eng

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A Pd-anchored poly(vinyl chloride-co-maleic acid monoamide)/poly(vinyl chloride) ultrafiltration membrane for the efficient degradation of 4-nitrophenol

Abstract: An ultrafiltration membrane (UF), prepared with blend of poly(vinyl chloride) (PVC) and low molecular weight poly(vinyl chloride-co-maleic acid monoamide) (PVMA), demonstrates a significantly improved filtration flux. For example, the water...

Cited by 3 publications

References 49 publications

Synthesis of a Vinyl Chloride-Methyl Acrylate Random Copolymer with Controllable Copolymer Composition and Its Processing Features in Rigid PVC

Synthesis of a Vinyl Chloride-Methyl Acrylate Random Copolymer with Controllable Copolymer Composition and Its Processing Features in Rigid PVC

A 5,5’‐Thiobis(thiazol‐2‐amine)‐based dithiocarbamate polymer: Straightforward synthesis and application in PVC membrane modification to enhance cadmium and dye removal

Green Fabrication of Effective Silver Loading on Fishbone-Derived Hydroxyapatite: A Robust Catalyst for 4-Nitrophenol Reduction

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