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利用木醋杆菌M12静态发酵生产制得细菌纤维素,分别经氢氧化钠(NaOH)等7种碱或强碱盐提纯处理后进行干燥,通过对细菌纤维素的含水率、复水率、物性测试及红外光谱分析,表征其结构和性能的差异。结果表明,改变碱和干燥处理方式不影响细菌纤维素的含水率;冷冻干燥处理的细菌纤维素的复水率较其它干燥方式明显提高,且不受处理碱种类的影响;处理碱对细菌纤维素的结构及硬度、凝聚性等物性指标均有显著影响,其中NaOH是较合适的处理碱,其处理的细菌纤维素膜质地优良,纯度高。
The bacterial cellulose produced by the static fermentation of Acetobacter Xylostella M12 was respectively purified by seven kinds of alkali or alkali salts such as sodium hydroxide (NaOH) and then dried. The water content, water recovery rate, physical properties Testing and infrared spectroscopy to characterize the differences in structure and performance. The results showed that the changes of alkali and drying methods did not affect the water content of bacterial cellulose. The water recovery rate of bacterial cellulose treated with freeze-drying was significantly higher than that of other drying methods, The structural, hardness and cohesive properties of all the compounds were significantly influenced by NaOH, of which NaOH was the most suitable alkali for treatment. The bacterial cellulose membrane was of good quality and high purity.