Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
Carbohydr Polym. 2015 Dec 10;134:337-43. doi: 10.1016/j.carbpol.2015.08.010. Epub 2015 Aug 11.
A new, super water-absorbing, material is synthesized by the reaction between chitosan, EDTA and urea and named as CHEDUR. CHEDUR is probably formed through the crosslinking of chitosan molecules (CH) with the EDTA-urea (EDUR) adduct that is formed during the reaction. CHEDUR as well as the other products formed in control reactions are characterized extensively. CHEDUR exhibits a very high water uptake capacity when compared with chitosan, chitosan-EDTA adduct, as well as a commercial diaper material. A systematic study was done to find the optimum composition as well as reaction conditions for maximum water absorbing capacity. CHEDUR can play a vital role in applications that demand the rapid absorption and slow release of water such as agriculture, as a three in one new material for the slow release of urea, water and other metal ions that can be attached through the EDTA component. The other potential advantage of CHEDUR is that it can be expected to degrade in soil based on its chitosan backbone. The new material with rapid and high water uptake could also find potential applications as biodegradable active ingredient of the diaper material.
一种新的超强吸水性材料，是通过壳聚糖、EDTA 和尿素之间的反应合成的，并命名为 CHEDUR。CHEDUR 可能是通过壳聚糖分子 (CH) 与反应过程中形成的 EDTA-尿素 (EDUR) 加合物的交联形成的。广泛地对 CHEDUR 以及对照反应中形成的其他产物进行了表征。与壳聚糖、壳聚糖-EDTA 加合物以及商业纸尿裤材料相比，CHEDUR 具有非常高的吸水性。进行了系统的研究以找到最佳的组成和反应条件，以获得最大的吸水能力。CHEDUR 在需要快速吸收和缓慢释放水的应用中可能发挥重要作用，例如农业领域，作为一种可同时缓慢释放尿素、水和其他可通过 EDTA 组分附着的金属离子的三效合一新材料。CHEDUR 的另一个潜在优势是，基于其壳聚糖骨架，它有望在土壤中降解。这种具有快速高吸水性的新材料也可能作为纸尿裤材料的可生物降解活性成分找到潜在的应用。
