端氨基蔗渣纤维素对水中重金属离子微污染吸附的研究进展

Research progress on preparation of amino-terminated hyperbranched polymer graft bagasse cellulose and on its adorption properties of heavy metal ions

中文关键词:  重金属离子  吸附  蔗渣纤维素  端氨基超支化  改性

英文关键词:heavy metal ions  adsorption  bagasse cellulose  amino-termination  hyperbranch

中文摘要:

      在重金属污染日益严重的今天, 重金属污染的治理已经越来越受到广泛的关注。纤维素分子含有大量的羟基, 但天然纤维素吸附能力并不好, 通过化学改性后可成为性能良好的吸附剂。纤维素无污染、易生物降解、且来源广泛价格低廉, 对其研究已成为该领域的热点, 并已被广泛应用于重金属污染治理领域。超支化聚合物大分子作为一类制备工艺并不繁琐且容易得到树状高分子聚合物, 其最大特点就是准球形的分子结构及末端官能团的可控性, 其研究愈加受到关注。本文在文献综述的基础上, 提出合成一种含有端氨基超支化合物结构的蔗渣改性重金属吸附剂的可行性技术设想。

英文摘要:

      On account of the pollution problems caused by heavy metals becoming more and more serious, the technology of heavy metal treatment has received more and more attentions in nowadays. As an effective adsorbent, cellulosic materials were largely developed on industrial purpose being abundant in hydroxyl groups, but the adsorption ability of natural cellulose was still unsatisfactory for its large numbers of internal and interactive hydrogen bonds. Therefore, some modifications should be taken on the surface of cellulose molecular. Because of its unique properties of non-polluting, easily degradable, facile available, and low-cost, modified cellulose as heavy metal absorbent has already been intensively applied in separating and extracting of heavy metal ions from aqueous solution in this decade. Known as a type of dendritic polymers, the preparation processes of hyperbranched polymers are simple, and its torispherical molecular structure and terminal functional groups are controllable. Hence, the technology and development of these hyperbranched polymers are becoming more and more popular to current researchers. This paper reviewed the progress and proposed a feasible idea on synthesis of a containing amino terminated hyperbranched polymer structure of bagasse modification of heavy metal adsorbent.