Toward advanced gamma rays radiation resistance and shielding efficiency with phthalonitrile resins and composites

Derradji, Mehdi; Zegaoui, Abdeldjalil; Xu, Yi-le; Wang, An-ran; Dayo, Abdul Qadeer; Wang, Jun; Liu, Wenbin; Liu, Yuguang; Khiari, Karim

doi:10.1016/j.nimb.2018.02.017

Cited by 44 publications

(24 citation statements)

References 19 publications

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“…Despite the ease of implementation and the expected efficient recovery of TcO 4 − based on ion-exchange method 5,10 , the total performance of sorbent materials used seems not to be competent. For example, most traditional polymeric materials exhibit slow anion exchange kinetics and poor radiation resistance 11,12 , while inorganic cationic materials such as layered double hydroxide (LDH) 13 , sulfides 14 , and borates 15,16 exhibit low sorption capacity and poor selectivity. The emergence of hydrolytically stable cationic metal–organic materials (MOMs) has led to potent applications for capture of oxyanion pollutants 3,17–20 .…”

Section: Introductionmentioning

confidence: 99%

Anion-adaptive crystalline cationic material for 99TcO4− trapping

et al. 2019

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Efficient anion recognition is of great significance for radioactive 99 TcO 4 − decontamination, but it remains a challenge for traditional sorbents. Herein, we put forward a tactic using soft crystalline cationic material with anion-adaptive dynamics for 99 TcO 4 − sequestration. A cucurbit[8]uril-based supramolecular metal-organic material is produced through a multi-component assembly strategy and used as a sorbent for effective trapping of TcO 4 − . Excellent separation of TcO 4 − /ReO 4 − is demonstrated by fast removal kinetics, good sorption capacity and high distribution coefficient. Remarkably, the most superior selectivity among metal-organic materials reported so far, together with good hydrolytic stability, indicates potential for efficient TcO 4 − removal. The structure incorporating ReO 4 − reveals that the supramolecular framework undergoes adaptive reconstruction facilitating the effective accommodation of TcO 4 − /ReO 4 − . The results highlight opportunities for development of soft anion-adaptive sorbents for highly selective anion decontamination.

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Section: Introductionmentioning

confidence: 99%

Anion-adaptive crystalline cationic material for 99TcO4− trapping

et al. 2019

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“…Phthalonitrile resins are a class of heat-resistant thermosetting materials and known for their remarkable properties. [1][2][3][4][5][6][7] The distinguished comprehensive performance of these materials is beneficial for widespread applications, including microelectronic packing, 8,9 aerospace, 10 adhesives, 11 radiation shielding, [12][13][14] and advanced composite matrices. [15][16][17][18] Nevertheless, the course of solidifying pure phthalonitriles has been considerably slow.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of a novel high-temperature vinylpyridine-based phthalonitrile polymer

Wang

Zhang

et al. 2018

High Performance Polymers

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A novel vinylpyridine-based phthalonitrile monomer, 2,6-bis[3-(3,4-dicyanophenoxy)styryl]pyridine (BDSP), was resoundingly produced by a nucleophilic substitution reaction of 2,6-bis(3-hydroxystyryl)pyridine with 4-nitrophthalonitrile in the presence of potassium carbonate. The chemical structure of the synthesized BDSP was confirmed by proton (1H) and carbon (12C) nuclear magnetic resonance (NMR) as well as Fourier transform infrared (FTIR) analysis. The curing behavior of BDSP was investigated by FTIR and differential scanning calorimetry (DSC) analyses. The resin showed a low complex viscosity in the wide processing window between the monomer melting temperature and the curing temperature of the polymer, as discovered by rheological analysis. In addition, the properties of the polymer were studied by thermal gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). Based on the test results, the BDSP polymer demonstrated superior processing performance, excellent thermal stability, outstanding mechanical properties, and low water uptake, and these advanced performance characteristics are critical to many fields.

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“…The advanced polymeric composites are required to have a serious of performance like excellent mechanical properties, superior heat resistance, and certain functionality. The distinguished comprehensive performance of these composites is conductive for pervasive application in marine, aerospace, radiation shielding, and electronic fields [1][2][3][4][5]. The common resin matrix for advanced composites are epoxy [6,7], polyimide [8][9][10], polyetheretherketone [11,12], and the best heat-resistant resin during last four decades-phthalonitrile [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Novolac/Phenol-Containing Phthalonitrile Blends: Curing Characteristics and Composite Mechanical Properties

Zhang

Wang

et al. 2020

Polymers

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The phenol-containing phthalonitrile resin is a kind of self-curing phthalonitrile resin with high-temperature resistance and excellent properties. However, the onefold phthalonitrile resin is unattainable to cured completely, and the brittleness of the cured product is non-negligible. This paper focuses on solving the above problems by blending novolac resin into phenol-containing phthalonitrile. Under the action of abundant hydroxyl group, the initial curing temperature and gelation time at 170 °C decrease by 88 °C and 2820 s, respectively, monitored by DSC and rheological analysis. FT-IR spectra of copolymers showed that the addition of novolac increased the conversion rate of nitrile. When the novolac mass fraction is 10%, the peak of nitrile group disappears, which means the complete reaction. The mechanical test of blends composites shows that the maximum fracture strain of 10 wt% novolac addition is 122% higher than those of neat phthalonitrile composites on account of the introduction of flexible novolac chain segments. The mechanical properties are sensitive to elevated post-cured temperature; this is consistent with the result of morphological investigation using SEM. Finally, the dynamic mechanical analysis indicated that the glass transition temperature heightened with the increase of novolac content and post-curing temperature.

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Toward advanced gamma rays radiation resistance and shielding efficiency with phthalonitrile resins and composites

Cited by 44 publications

References 19 publications

Anion-adaptive crystalline cationic material for 99TcO4− trapping

Anion-adaptive crystalline cationic material for 99TcO4− trapping

Synthesis and properties of a novel high-temperature vinylpyridine-based phthalonitrile polymer

Novolac/Phenol-Containing Phthalonitrile Blends: Curing Characteristics and Composite Mechanical Properties

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