Surface modification of PVA hydrogel membranes with carboxybetaine methacrylate via PET-RAFT for anti-fouling

Lin, Yanming; Wang, Ling; Zhou, Jinsheng; Ye, Lin; Hu, Huiyuan; Luo, Zhen; Zhou, Li

doi:10.1016/j.polymer.2018.12.026

Cited by 50 publications

(33 citation statements)

References 60 publications

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“…For the further study of chemical composition, surface XPS analysis of the CS/PAADDA/PUB (1:0.5:0.5) membrane before and after ADT was performed with its dominant elements of carbon, nitrogen, and oxygen. As Figure A,B illustrates, it can be seen clearly that the spectrum mainly contains C (C1 s , 285 eV), N (N1 s , 400 eV), and O (O1 s , 532 eV) elements (The data listed above is largely similar to other reported references …”

Section: Resultssupporting

confidence: 85%

“…As Figure 7A,B illustrates, it can be seen clearly that the spectrum mainly contains C (C1s, 285 eV), N (N1s, 400 eV), and O (O1s, 532 eV) elements (The data listed above is largely similar to other reported references. [41][42][43]. Before ADT treatment, relative atomic ratios of carbon, nitrogen, and oxygen are 67.97%, 7.11%, and 24.92%, respectively.…”

Section: Xps Analysismentioning

confidence: 99%

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Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

2019

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Summary A novel OH− conducting membrane containing chitosan (CS), poly‐(acrylamide‐co‐diallyldimethylammonium chloride) (PAADDA) and linear structured poly‐bis (2‐chloroethyl) ether‐1,3‐bis [3‐(dimethylamino)propyl] urea copolymer (PUB) was synthesized via a solution‐casting method and subsequently modified by hot treatment and chemical cross‐linking. The structural characterizations of scanning electron microscope (SEM), atomic force microscope (AFM), Fourier transform infrared spectra (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) were carried out, showing that CS, PAADDA, and PUB formed a compact interpenetrating polymer network structure without apparent phase separation phenomenon under the help of cross‐linking. By changing the content of PUB in the membrane, the application performance such as mechanical properties, thermal gravimetric (TG) analysis, water uptake (WU), OH− conductivity ( σOH−) and ion exchange capacity (IEC) were investigated to evaluate the feasibility for alkaline membrane fuel cells. The maximum OH− conductivity could be reached up to 3.12 × 10−2 S cm−1 at 80°C in a mass ratio of CS/PAADDA/PUB (1:0.5:0.5) while a good tensile strength of 22.73 MPa and an excellent elongation at break of 23.55% could be obtained in a mass ratio of CS/PAADDA/PUB (1:0.5:0.25). Furthermore, the membrane also exhibited relatively high oxidative stability as well as excellent alkaline resistance stability, when conditioned in 30% H2O2 solution at ambient temperature for 120 hours and 8 M KOH solution at 60°C for 320 hours, respectively. Membrane electrode assemblies (MEAs) achieved a peak power density of 38.1 mW cm−2 at the maximum current density of 73.2 mA cm−2 in a H2/O2 system at room temperature. PUB was successfully introduced into the CS‐based membrane to improve the conductivity. Maximum OH− conductivity reached 0.016 S cm−1 at room temperature. Tensile strength of the prepared membrane could reach up to 22.73 MPa. The prepared membrane exhibited an excellent elongation at break of 23.55%. The membrane showed good oxidative stability and excellent alkaline resistance stability.

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Section: Resultssupporting

confidence: 85%

Section: Xps Analysismentioning

confidence: 99%

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

2019

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“…Polyvinyl alcohol (PVA) is a biodegradable and environmentally friendly polymer material with good water solubility and membrane forming properties. Recently, PVA hydrogels with a three‐dimensional network built by crosslinked chain networks (physical or chemical one) have received much attention on its excellent biocompatibility and feasibility in many biomedical applications, such as agricultural application, biomedical applications, food packaging, separation and purification, catalytic chemistry, electrochemistry, adsorption chemistry, and so on. These numerous applications can be based on the specific hydrogen bonding between inter and intramolecular hydrogen bonds in PVA chains, whose strength has an influence of structure and mechanical properties of PVA gel .…”

Section: Introductionmentioning

confidence: 99%

Swelling Resistance and Mechanical Performance of Physical Crosslink‐Based Poly(Vinyl Alcohol) Hydrogel Film with Various Molecular Weight

Zhang

Bao

et al. 2019

J Polym Sci B Polym Phys

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The present work aimed to develop polyvinyl alcohol (PVA) hydrogel films with physically crosslinking through controllable entanglement density of the polymer chains. The viscoelasticity of PVA aqueous solutions was investigated over a broad range in molecular weight. The chain length between the crosslinks in the hydrogel (falseMe¯) and entanglement density was determined by the plateau modulus (G'). The value of (falseMe¯) increased with the PVA molecular weight, which can be attributed to the enhanced entanglement associated with the hydrogen bonds between inter‐ and interchains. The melting and crystallization of the transparent PVA hydrogel films showed that the crystallinity was below 30%, which indicated that microcrystallites formed. Therefore, the entanglement effect and microcrystallization enhanced the stable crosslinked hydrogel network, which further improved by an increase in the molecular weight. Altogether, the PVA with the molecular weight higher than 88,000 g/mol can be envisioned as a promising material for preparing the hydrogel film possessing excellent performance. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 1673–1683

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“…The third stage which occurs at the temperature range of 360-520 C is due to structural degradation of chitosan main chain and crosslinkers (glutaraldehyde). 30,32,38 TGA analysis indicates that chitosan hydrogel with glutaraldehyde cross-linkers have been successfully formed.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

pH-Sensitive magnetite mesoporous silica nanocomposites for controlled drug delivery and hyperthermia

et al. 2020

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Surface modification of PVA hydrogel membranes with carboxybetaine methacrylate via PET-RAFT for anti-fouling

Cited by 50 publications

References 60 publications

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Swelling Resistance and Mechanical Performance of Physical Crosslink‐Based Poly(Vinyl Alcohol) Hydrogel Film with Various Molecular Weight

pH-Sensitive magnetite mesoporous silica nanocomposites for controlled drug delivery and hyperthermia

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