Preparation and characterization of a poly(ethylene glycol) grafted carboxymethyl konjac glucomannan copolymer

Preparation and characterization of a poly(ethylene glycol) grafted carboxymethyl konjac glucomannan copolymer
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聚乙二醇接枝羧甲基魔芋葡甘聚糖共聚物的制备及表征

DOI:
10.1016/j.carbpol.2009.09.014
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发表时间:
2010-02
影响因子:
11.2
通讯作者:
Xia, Bing
Xia, Bing
中科院分区:
化学1区
文献类型:
--
作者:
Zhang, Sheng;Ha, Wei;Li, Bang-Jing;Peng, Shu-Lin;Govender, Thirumala;Meng, Xian-Wei;Ding, Li-Sheng;Xia, Bing

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在1-乙基-3-[3-(二甲氨基)丙基]-碳二亚胺(EDC)和n -羟基琥珀酰亚胺(NHS)存在下,将羧甲基魔芋葡甘露聚糖(CKGM)与甲氧基聚乙二醇(mPEG) (CKGM-g-mPEG)共聚物接枝。通过改变mPEG- ococh2nh2 /CKGM的投料比,可以调节mPEG的取代度(DS)。根据TGA数据计算了mPEG对CKGM的取代度(DS)。通过FT-IR、1H NMR、DSC和TGA等手段对产物的化学结构和物理性质进行了鉴定。溶解度和粘度测试表明,与未聚乙二醇化的CKGM相比,CKGM-g- mpeg在低剪切频率下具有更好的溶解度和更低的粘度。
Carboxymethyl konjac glucomannan (CKGM) grafted methoxy poly(ethylene glycol) (mPEG) (CKGM-g-mPEG) copolymer was prepared by reacting the CKGM with methoxy poly(ethylene glycol) amine in the presence of 1-ethyl-3-[3-(dimethylamino)propyl]-carbodiimide (EDC) and N-hydroxysuccimide (NHS). By varying the mPEG-OCOCH2NH2/CKGM feed ratio, the degree of substitution (DS) of mPEG could be adjusted. The degree of substitution (DS) of mPEG into CKGM was calculated from TGA data. The chemical structure and physical properties of the products were identified by means of FT-IR,1H NMR, DSC and TGA. Solubility and the viscosity tests showed that CKGM-g-mPEG has better solubility and lower viscosity at low shear frequency as compared to non-pegylated CKGM.
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发表时间: 2008-11
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