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哲浩

木虫 (正式写手)

[求助] 有没有做过酸酐改性明胶的?

不知有人做过没有,最近我也在做甲基丙烯酸酐的,可是按照文献做不出来。不知道那些大侠做过类似的可以多交流啊
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Emma_THU

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引用回帖:
3楼: Originally posted by aircraftvip at 2011-12-04 03:54:01
我重复过这个实验,没有问题啊,你用的哪种明胶? 另外你有没有测pH值? 因为type A的明胶溶于去离子水后的pH值大概只有6左右。
你用的什么方法测取代度?

您好哎,我最近用甲基丙烯酸酐接枝明胶,用H 核磁测接枝率的时候用什么做溶剂比较好啊~~
披着理工科研的外衣,怀着文艺青年的心情,致力于医用材料的开发。
7楼2016-03-18 10:09:43
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aircraftvip

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【答案】应助回帖


lixiangde(金币+1): 感谢回帖交流 2011-12-02 23:04:46
哲浩(金币+2): 我就是按照这个文献做不出来,呵呵 2011-12-03 12:59:48
Gelatin methacrylamide was prepared by reaction of
gelatin with methacrylic anhydride. After dissolution of
gelatin in phosphate buffer (pH 7.5) at 50 °C, methacrylic
anhydride was added while vigorously stirring. After 1 h of
reaction, the reaction mixture was diluted and dialyzed for
24 h against distilled water at 40 °C. The reaction product
was then freeze-dried leading to a white solid. The degree
of substitution (DS) is defined as the percentage of -amino
groups that are modified and is determined by the Habeeb
method
------Biomacromolecules 2000, 1, 31-38
格物致知,知行合一
2楼2011-12-02 20:42:50
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aircraftvip

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lixiangde(金币+1): 感谢回帖交流 2011-12-04 11:27:08
哲浩(金币+8): 2011-12-14 09:27:10
我重复过这个实验,没有问题啊,你用的哪种明胶? 另外你有没有测pH值? 因为type A的明胶溶于去离子水后的pH值大概只有6左右。
你用的什么方法测取代度?
格物致知,知行合一
3楼2011-12-04 03:54:01
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我要努力

新虫 (初入文坛)

引用回帖:
2楼: Originally posted by aircraftvip at 2011-12-02 20:42:50
Gelatin methacrylamide was prepared by reaction of
gelatin with methacrylic anhydride. After dissolution of
gelatin in phosphate buffer (pH 7.5) at 50 °C, methacrylic
anhydride was added while vi ...

这样改性后 明胶的凝胶性能不会消失吗
4楼2012-11-28 14:43:33
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