Effect of Mechanical Refining Treatment on Fiber Grafting Modification
Effect of Mechanical Refining Treatment on Fiber Grafting Modification
复制标题
机械精炼处理对纤维接枝改性的影响
DOI：
10.4028/www.scientific.net/amm.496-500.436
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发表时间：
2014-01
期刊：
影响因子：
--
通讯作者：
Qin Wu
中科院分区：
文献类型：
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作者：
Weiliu;Fangong Kong;Shoujuan Wang;Qin Wu
纤维素纤维作为地球上含量最丰富的生物聚合物，由于其可生物降解性和可再生性，在去除水溶液中的离子方面越来越受到人们的关注。本文以3-氯-2-羟丙基三甲基氯化铵为功能剂，对纤维素纤维进行改性，使其对水溶液中的六价铬进行吸附。重点研究了接枝前的机械打浆处理对改性效果的影响，以及改性后纤维的吸附性能。用精制纤维和原纤维进行了改性。用红外光谱分析对改性纤维进行了表征。结果表明，在异丙醇溶液和碱性条件下，该功能剂均可接枝到纤维上。在改性前对纤维素纤维进行机械打浆处理，可以提高接枝效率。改性处理纤维对水溶液中六价铬的吸附能力高于改性未处理纤维。机械打磨处理后的纤维表面羟基较多，是改性处理纤维具有较高的吸附能力和接枝效率的原因。
Cellulosic fibers, as the most abundant biopolymer on earth, are attracting more and more interesting to be absorbent for ion removal from aqueous solution due to its biodegradability and renewability. In this paper, 3-chloro-2-hydroxypropyl trimethyl ammonium chloride was used as functional agent to modify the cellulosic fibers to be absorbent for Cr (VI) in aqueous solution. Our attention in this work was aimed at the influence of mechanical refining treatment before graft on the modification as well as the absorption capability of modified fibers. The modification was carried out using refined fibers and raw fibers. The modified fibers were verified by IR analysis. The results showed that in isopropyl alcohol solution and under alkaline condition, the functional agent can be grafted onto fibers. The mechanical refining treatment of cellulosic fibers before modification can improve the grafting efficiency. The absorption capability of modified treated-fibers for Cr (VI) from aqueous solution is higher than that of modified untreated-fibers. More hydroxyl groups on the surface of fibers after mechanical refining treatment is the reason for higher absorption capability of modified treated-fibers and higher grafting efficency.