具有增强的抗辐射性能的聚砜-二氧化铈混合基质膜,ACS Applied Polymer Materials

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具有增强的抗辐射性能的聚砜-二氧化铈混合基质膜
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2019-06-12 , DOI: 10.1021/acsapm.9b00389
Amita Bedar _{1,

2} , R. K. Lenka ₃ , N. Goswami ₂ , V. Kumar ₄ , A. K. Debnath ₅ , D. Sen ₆ , S. Kumar ₇ , S. Ghodke ₈ , P. K. Tewari ₁ , R. C. Bindal _{1,

2} , S. Kar _{1,

2}

Affiliation

开发了一种新型的具有增强的抗γ辐射性能的聚砜-氧化铈（Psf-二氧化铈）混合基质膜（MMM）。通过凝胶燃烧途径合成二氧化铈纳米颗粒，然后将各种浓度的二氧化铈（Psf的0.1–2％）掺入聚砜基质中，以合成Psf-二氧化铈MMM。用100、500和1000 kGy的γ辐射剂量检查了合成膜的辐射稳定性。二氧化铈纳米颗粒的特征在于X射线衍射（XRD），X射线光电子能谱，小角X射线散射（SAXS），透射电子显微镜和能量色散X射线光谱技术。这些特征证实了成功合成的纯净，结晶和平均粒径为12 nm的二氧化铈纳米颗粒。Psf-ceria MMMs是通过非溶剂诱导的相转化技术合成的。使用扫描电子和原子力显微镜研究分析了辐射对膜的形态和形貌的影响。通过液滴形状分析仪，傅立叶变换红外光谱法，凝胶渗透色谱法和XRD研究检查了理化性质。这些分析证实，二氧化铈纳米颗粒均匀地分布在整个Psf膜基质中，而二氧化铈和Psf之间没有任何化学相互作用。内部结构通过正电子lifetime没寿命光谱法和SAXS技术进行评估。通过通用测试机评估机械性能。通过纯水渗透性和溶质（聚（环氧乙烷），100 kDa）排斥研究。与对照Psf膜相比，Psf-ceria MMMs在性能上显示出更高的稳定性。氧化铈的稳定性归因于其两个氧化态以及通过在这两个态之间滑动来清除自由基的能力（Ce⁴⁺ ↔Ce ³⁺）。这使MMM具有抗辐射性，与对照Psf膜相比，负载0.5-1％的Psf-二氧化铈膜在中等液体放射性废水环境中的寿命延长了五倍。

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Polysulfone–Ceria Mixed-Matrix Membrane with Enhanced Radiation Resistance Behavior

A novel polysulfone–cerium oxide (Psf–ceria) mixed-matrix membrane (MMM) with enhanced γ radiation resistant property was developed. Ceria nanoparticles were synthesized by gel-combustion route and then various concentrations of ceria (0.1–2% of Psf) were incorporated in the polysulfone matrix to synthesize Psf–ceria MMMs. Radiation stability of the synthesized membranes was checked with γ radiation doses of 100, 500, and 1000 kGy. Ceria nanoparticles were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy, small-angle X-ray scattering (SAXS), transmission electron microscopy, and energy dispersive X-ray spectroscopy techniques. These characterizations confirmed the successful synthesis of pure, crystalline, and 12 nm average size ceria nanoparticles. Psf–ceria MMMs were synthesized by non-solvent-induced phase inversion technique. The effect of radiation on the morphology and topography of membranes was analyzed using scanning electron and atomic force microscopy studies. The physicochemical properties were examined by drop shape analyzer, Fourier transform infrared spectroscopy, gel permeation chromatography, and XRD studies. These analyses confirmed that ceria nanoparticles were uniformly distributed throughout the Psf membrane matrix without any chemical interaction between the ceria and Psf. The internal structure was evaluated by positron annihilation lifetime spectroscopy and SAXS techniques. The mechanical properties were assessed by universal testing machine. The performance of the membranes was analyzed through pure water permeability and solute (poly(ethylene oxide), 100 kDa) rejection studies. Psf–ceria MMMs showed enhanced stability in the performance compared to that of control Psf membrane. The stability of ceria is due to its two oxidation states and its ability to scavenge free radicals by swiping between those two states (Ce⁴⁺ ↔ Ce³⁺). This makes the MMMs radiation resistant, with 0.5–1% loaded Psf–ceria membrane five times enhanced life span in intermediate liquid radioactive effluent environment, compared to control Psf membrane.

更新日期：2019-06-12

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