为改善含银甲壳胺纤维释放银离子的性能,用乙酸酐处理甲壳胺纤维后使纤维中的氨基转换成乙酰胺基,从而减弱纤维对银离子的结合力.比较了未处理纤维和几种不同取代度乙酰化甲壳胺纤维的吸水性及其释放银离子的性能.结果表明,乙酰化处理破坏了甲壳胺纤维的有序结构,使水分更容易进入纤维结构,部分乙酰化的甲壳胺纤维具有很高的吸水性能.由于乙酰化处理使自由氨基转换成乙酰胺基,随着乙酰化度的提高,处理后的甲壳胺纤维在遇水湿润后可释放出更多的银离子.

In order to develop applications of cotton fibers in the field of biomedical materials,this paper summarized the research progress in the functional modifications of cotton fibers and described the technologies, product performances and applications of oxidization, etherification, branch copolymerization,chelation and other methods for modifying the chemical structure of cellulose. Results showed that oxidized cellulose and sodium carboxymethyl cellulose fibers obtained from oxidized and etherified cotton have excellent haemostatic and absorption properties, while antimicrobial, antiultraviolet,catalyzing,slow releasing and other functions of the modified cotton fibers can be obtained by attaching polysaccharides,proteins,peptides,enzymes,cyclodextrins,lipids,metal ions and other biologically active materials. The functionally modified cotton fibers are highly valuable in the fields of biomedical materials and functional medical textile products.

校本课程不仅仅是新课程改革中一门新兴的课程，而是一种教育观，更是一种学习观，这种观念对各门学科课改的推进，对素质教育的推进有着深远影响。它为学生提供了丰富的有价值的学习材料，校本课程的开发已成为了课程改革的亮点之一。但是我们不得不接受这样一个现实，就是当这些校本教材被开发以后，教师该如何利用。很多的时候，教师或许是流于形式地教一教，抑或是学生心血来潮地读一读。我们不禁要问校本课程教学的“质”在哪里？笔者认为教材的教学和利用更应该是校本课程改革的最大亮点。

This paper used chloroacetic acid to treat SeaCell active fibers.Carboxymethylated SeaCell active fibers with high absorbency were obtained by reacting the hydroxyl groups in the fibers with chloroacetic acid.The swelling ratios,silver releasing properties and antimicrobial properties of the fibers before and after treatment were studied.Experimental results showed that the carboxymethylation treatment can effectively increase the absorbency and gelling performances of the fibers,with the swelling ratio of the treated fibers over 10 times more than that of the untreated ones.Because the fibers after carboxymethylation treatment swell greatly when in contact with water,silver ions in the fibers can be released more easily.The experimental results indicated that the modified fibers have better antimicrobial performances than the untreated ones.