TEMPO-NaBr-NaClO 体系对细菌纤维素的氧化过程研究

doi:10.3969/j.issn.0258-8021. 2013. 06.09

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Abstract Bacterial cellulose (BC) is a kind of biomedical scaffold with nano network, and its biodegradation can be improved through selective catalytic oxidation. The TEMPO-mediated oxidation of BC was investigated when the amount of NaClO, TEMPO and the reaction time changed. The experimental results reveal that, in the range of test conditions, the initial reaction rate is inversely proportional to the amount of NaClO; the pH of system is one of the main factors which influence this stage reaction rate, and the maximum reaction rate appears in pH＝10.50～11.00; while the amount of TEMPO has no obvious effect on it. For the whole reaction process, both the reaction rate and waterinsoluble fractions' carboxylic content are proportional to the amount of NaClO, and they have a good linear relationship when the dosage of 0.6 mol/L NaClO is during 1～8 mL; both of them are also proportional to the amount of TEMPO. The waterinsoluble fractions' carboxylic content gradually decreases at first and then remains stable at 0.70～0.75 mol/kg with increasing oxidation time. In conclusion, the rule of the TEMPO-mediated oxidation of BC has significant differences in different stages, and the main cause could be its unique nanostructure and properties.

Key words： bacterial cellulose TEMPO selective oxidation carboxylic content

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	LIAO Shi Bo¹XI Ting Fei¹
	2
	4LAI Chen^2LIAO Shi Yu³HUANG Tao⁴WANG Shuai Yan^4

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LIAO Shi Bo¹XI Ting Fei^1,2,4*LAI Chen^2*LIAO Shi Yu³HUANG Tao⁴WANG Shuai Yan^4. Study on TEMPO-mediated Oxidation of Bacterial Cellulose[J]. journal1, 2013, 32(6): 699-707.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021. 2013. 06.09 OR http://cjbme.csbme.org/EN/Y2013/V32/I6/699

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