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首页> 外文期刊>Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides >Electron beam crosslinking of alginate/nanoclay ink to improve functional properties of 3D printed hydrogel for removing heavy metal ions
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Electron beam crosslinking of alginate/nanoclay ink to improve functional properties of 3D printed hydrogel for removing heavy metal ions

机译:藻酸盐/纳米粘土油墨的电子束交联,提高三维印刷水凝胶的功能性能去除重金属离子

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A printable nanocomposite hydrogel was fabricated with intercalation of alginate into clay galleries followed by irradiation crosslinking graft copolymerization acrylic acid to remove inorganic micropollutants from wastewater. In this regard, nanocomposite-based ink was treated by electron beam irradiation (5-60 kGy), and then irradiated inks were printed using an extrusion-based printer. Structural investigates showed that ink suspension formed a crosslinked network upon irradiation, which could preserve its shape during printing and maintain 3D printed architecture. No additional post-print crosslinking was required due to the formation of free radical and remaining in printed hydrogels as shown by electron spin resonance. Printed hydrogels treated with 5 and 60 kGy irradiation experienced instrumental changes, while functional properties of 15-45 kGy irradiated samples were unaffected upon printing. Losing crystallinity and thermal instability of hydrogels after printing were inhibited through irradiation crosslinking. Metal ion adsorption capacity showed that crosslinked printed hydrogels effectively removed heavy metal ions with high-capacity and fast-responsive. Moreover, metal ions adsorption by printed hydrogels was not selective, thus they can be used to remove various metal ion pollutants from wastewater.
机译:通过将可印刷的纳米复合材料水凝胶与藻酸盐插入到粘土术中,然后用辐射交联接枝共聚丙烯酸,除去废水中的无机微孔径。在这方面,通过电子束照射(5-60kGy)处理纳米复合材料油墨,然后使用基于挤出的打印机印刷照射的油墨。结构研究表明,墨水悬浮液在照射时形成交联网络,这可能在印刷期间保持其形状并维持3D印刷架构。由于形成自由基并留在印刷水凝胶中,不需要额外的印刷后交联,如电子自旋共振所示。用5和60吨杆照射处理的印刷水凝胶经历了仪器变化,而15-45吨杆辐照样品的功能性不受影响。通过辐射交联抑制印刷后的水凝胶的结晶度和热不稳定性。金属离子吸附能力显示交联的印刷水凝胶有效地除去重金属离子,高容量和快速响应。此外,印刷水凝胶吸附的金属离子未选择性,因此它们可用于从废水中除去各种金属离子污染物。

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