Polymerization mechanism for radiation-induced grafting of styrene into alicyclic polyimide films for preparation of polymer electrolyte membranes

Park, June; Enomoto, Kazuyuki; Yamashita, Takashi; Takagi, Yukio; Todaka, Katsunori; Maekawa, Yasunari

doi:10.1016/j.memsci.2013.03.007

Cited by 18 publications

(6 citation statements)

References 25 publications

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“…Gra-type PEMs, which are prepared by radiation-induced gra polymerization of monomers and the subsequent sulfonation reaction of the gra polymers, can overcome the abovementioned problems because the gra-type PEM comprises substrate lms that have a mechanically tough crystalline phase and various functional graed polymer phases directly bonded to the polymer main chain. [31][32][33][34][35][36][37][38][39][40][41][42][43][44] Furthermore, the introduction of sulfonated gra side chains into the polymer main chain is an excellent approach to PEM preparation because the IEC values can be controlled by easily changing the degree of graing. Recently, we studied the RH dependence of the electrochemical and mechanical properties of poly(styrene sulfonic acid) (PSSA)-graed poly(ethylene-co-tetrauoroethylene) polymer electrolyte membranes (ETFE-PEMs) over a wide IEC range.…”

Section: Introductionmentioning

confidence: 99%

Poly(ether ether ketone) (PEEK)-based graft-type polymer electrolyte membranes having high crystallinity for high conducting and mechanical properties under various humidified conditions

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Poly(ether ether ketone) (PEEK)-based graft-type polymer electrolyte membranes having high crystallinity for high conducting and mechanical properties under various humidified conditions

et al. 2015

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“…Apart from interlayer nanochannels, oxygen-containing groups of GO are also crucial for salt rejection, since these functional groups on GO could provide electrostatic interactions between GO nanosheets and ions. The negatively charged surface of GO membranes plays a vital role in transporting ions due to the charge selectivity mechanism [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

A Facile Way to Fabricate GO-EDA/Al2O3 Tubular Nanofiltration Membranes with Enhanced Desalination Stability via Fine-Tuning the pH of the Membrane-Forming Suspensions

Ding

2023

Membranes

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Pristine graphene oxide (GO)-based membranes have proven promising for molecular and ion separation owing to efficient molecular transport nanochannels, but their separation ability in an aqueous environment is limited by the natural swelling tendency of GO. To obtain a novel membrane with anti-swelling behavior and remarkable desalination capability, we used the Al2O3 tubular membrane with an average pore size of 20 nm as the substrate and fabricated several GO nanofiltration ceramic membranes with different interlayer structures and surface charges by fine-tuning the pH of the GO-EDA membrane-forming suspension (pH = 7, 9, 11). The resultant membranes could maintain desalination stability, whether immersed in water for 680 h or operated under a high-pressure environment. When the pH of the membrane-forming suspension was 11, the prepared GE-11 membrane showed a rejection of 91.5% (measured at 5 bar) towards 1 mM Na2SO4 after soaking in water for 680 h. An increase in the transmembrane pressure to 20 bar resulted in an increase in the rejection towards the 1 mM Na2SO4 solution to 96.3%, and an increase in the permeance to 3.7 L·m−2·h−1·bar−1. The proposed strategy in varying charge repulsion is beneficial to the future development of GO-derived nanofiltration ceramic membranes.

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“…Compared with the conventional pad-dry-cure method, the EB irradiation process is energy-saving and environmentally friendly as it does not require high curing temperatures and an initiator in the treatment of textile materials. 28 EB irradiation technology was applied for the modification of cables for improved heat and flame resistance, 29,30 and for medical materials, such as the combination of chondrocytes with hydrogels, that are implanted to repair damaged cartilage. 31 The use of EB for the modification of PET fabrics is a novel and effective method; EB can produce free radicals on the materials within several minutes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Phosphorus-Containing Fllame Retardant Monomer and Grafting of PET Fabrics via Electron Beam Irradiation

Ding¹,

Zhang²,

Ren³

et al. 2020

AATCC Journal of Research

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The flame retardant, diethyl methacryloylphosphoramidate (DMPP), was synthesized by the reaction of diethyl chlorophosphate with methacrylamide and triethylamine. DMPP was grafted onto polyethylene terephthalate (PET) fabrics by electron beam (EB) irradiation. scanning electron microscopy (SEM) images and Fourier transform-infrared (FT-IR) spectra showed that the flame retardant was successfully grafted on the surface of PET fabrics. The morphology of the grafted fabrics after burning showed a porous protective layer on the surface. The FT-IR spectra showed that the flame retardant generated a large amount of phosphorus oxygen-nitrogen compounds after burning. The limiting oxygen index (LOI) of the grafted fabrics increased with the increase of DMPP concentration. The char length of fabrics treated with DMPP after combustion decreased from 30 cm to 5.9 cm, which demonstrated effective flame resistance.

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Polymerization mechanism for radiation-induced grafting of styrene into alicyclic polyimide films for preparation of polymer electrolyte membranes

Cited by 18 publications

References 25 publications

Poly(ether ether ketone) (PEEK)-based graft-type polymer electrolyte membranes having high crystallinity for high conducting and mechanical properties under various humidified conditions

Poly(ether ether ketone) (PEEK)-based graft-type polymer electrolyte membranes having high crystallinity for high conducting and mechanical properties under various humidified conditions

A Facile Way to Fabricate GO-EDA/Al2O3 Tubular Nanofiltration Membranes with Enhanced Desalination Stability via Fine-Tuning the pH of the Membrane-Forming Suspensions

Synthesis of Phosphorus-Containing Fllame Retardant Monomer and Grafting of PET Fabrics via Electron Beam Irradiation

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