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- W2468800438 abstract "In this study, preparation of positively and negatively charged carbon nanotube (CNT)-collagen (CG) hydrogels with pH sensitive characteristic was reported. The positive and negative characteristics of the prepared hydrogels were created by introduction of positively functionalized CNT-NH2 and negatively functionalized CNT-COOH, respectively, into the collagen hydrogel. The surface charge of CNTs (CNT-NH2 and CNT-COOH), CG and CNTs/CG hydrogels was measured by Zetasizer. The swelling ratios of CNT-NH2/CG and CNT-COOH/CG hydrogels in aqueous solution were checked by measuring of weight changes of the hydrogels in the range of pH 2~10. In detail, the positively charged CNT-NH2/CG hydrogel swelled up to 5% at pH 4 in comparison to the weight at pH 7, while the negatively charged CNT-COOH/CG hydrogel swelled up to 10% at pH 10. The prepared CNT-NH2/CG and CNT-COOH/CG hydrogels will be very useful as pH sensitive oral drug-delivering systems for gastrointestine (pH ~2) and small intestine (pH ~9), respectively." @default.
- W2468800438 created "2016-07-22" @default.
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- W2468800438 date "2016-06-20" @default.
- W2468800438 modified "2023-10-14" @default.
- W2468800438 title "Preparation of Positively and Negatively Charged Carbon Nanotube-Collagen Hydrogels with pH Sensitive Characteristic" @default.
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- W2468800438 doi "https://doi.org/10.5012/jkcs.2016.60.3.187" @default.
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