In this study, the fabrication of silica‐grafted‐sulfonated styrene (S‐g‐SSt) resin by grafting of styrene onto silanized silica via gamma radiation‐induced polymerization and subsequent sulfonation of the grafted styrene is described. The grafting was strongly affected by the reaction conditions; absorbed dose, monomer concentration, and the type of solvent used. The structural analysis of the silica and all the relevant products were carried out by FTIR, SEM, TGA, XRD, and BET. FTIR analysis confirmed the presence of styrene onto silica and subsequent sulfonation. The BET nitrogen adsorption–desorption isotherms indicated that grafting occurs on the surface as well as inside the pores. Finally, the ion exchange capacity (IEC) of the fabricated S‐g‐SSt was evaluated by ion exchange titrations (back titration method). The IEC was found to be in the range of 0.43–2.97 meq/g depending on the degree of grafting. The facile fabrication method and high IEC value (2.97 meq/g) could lead to potential application of the fabricated S‐g‐SSt resin in ion exchange resin in waste water treatment and metal recovery. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48835.

中文翻译：

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辐射诱导的苯乙烯接枝聚合反应及随后的磺化在离子交换应用中介孔二氧化硅的表面改性

在这项研究中，二氧化硅的制造接枝-sulfonated苯乙烯（S-克的苯乙烯接枝到-SSt）树脂硅烷化二氧化硅经由伽马辐射诱发的聚合和接枝苯乙烯的磺化随后描述。接枝受反应条件的影响很大。吸收剂量，单体浓度和所用溶剂的类型。二氧化硅和所有相关产品的结构分析通过FTIR，SEM，TGA，XRD和BET进行。FTIR分析证实苯乙烯存在于二氧化硅上，随后进行磺化。BET氮吸附-解吸等温线表明，接枝发生在表面以及孔内部。最后，制成的S-的离子交换容量（IEC）用离子交换滴定法（反滴定法）对g- SSt进行了评估。根据接枝程度，发现IEC在0.43–2.97 meq / g的范围内。轻便的制造方法和高IEC值（2.97毫当量/克）可能会导致所制造的S-的潜在应用克离子交换树脂在废水处理和回收金属-SSt树脂。分级为4 +©2019 Wiley Periodicals，Inc.J.Appl。Polym。科学 2019，137，48835。