Abstract

In this study, a novel KGM-based superabsorbent polymer KGM-g-poly-(acrylic acid-co-acrylamide-co-N,N'-dimethyl-N-ethylmethacryloxylethylammoniumbromide) (KAAD) was prepared, which was obtained by the free radical grafting solution polymerization of acrylamide (AM), acrylic acid (AA) and N,N'-dimethyl-N-ethylethacryloxylethylammonium bromide (DMAEA-EB) onto konjac glucomannan (KGM) with of potassium persulfate (K₂S₂O₈) as initiator and N,N'-methylenebisacrylamide (MBA) as crosslinker. The groups of AA, AM and DMAEA-EB grafted on KGM were detected by infrared spectroscopy (FTIR). The effects of the reaction conditions (including an initiator dosage, AA and AM mass ratio, and a reaction temperature, etc.) on the grafting degree and grafting efficiency were investigated by a gravimetric method. The maximum grafting degree and grafting efficiency of the obtained graft polymer in the experiment were 71.51 and 89.90%, respectively. The effects of crosslinking agent and GD on water absorption were explored. And all of the experimental data show that the water absorption ratio of the KAAD resin exceeds 527.00 g/g under each optimal reaction conditions. Therefore, KAAD can be widely used as a functional material in pharmaceutics, textiles, construction and other fields due to its excellent superabsorbent properties.

中文翻译：

---

接枝聚合法合成KGM-g-P（AA-AM-（DMAEA-EB））及吸水性能

摘要

在这项研究中，一种新颖的KGM基于超吸收性聚合物KGM-克-聚（丙烯酸-共-acrylamide-共- Ñ，Ñ “二甲基Ñ -ethylmethacryloxylethylammoniumbromide）（KAAD）制备，其通过自由获得含过硫酸钾（K ₂ S ₂ O ₈）的丙烯酰胺（AM），丙烯酸（AA）和N，N'-二甲基-N-乙基乙基丙烯酰氧基乙基溴化铵（DMAEA-EB）的自由基接枝溶液聚合作为引发剂和N，N'-亚甲基双丙烯酰胺（MBA）作为交联剂。通过红外光谱（FTIR）检测接枝在KGM上的AA，AM和DMAEA-EB组。通过重量法研究了反应条件（包括引发剂的用量，AA和AM的质量比，反应温度等）对接枝度和接枝效率的影响。实验中所得接枝聚合物的最大接枝度和接枝效率分别为71.51和89.90％。探索了交联剂和GD对吸水率的影响。并且所有实验数据表明，在每种最佳反应条件下，KAAD树脂的吸水率均超过527.00g / g。因此，KAAD可以广泛用作制药，纺织品，