摘要
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。
Bacterial cellulose （BC） produced by Acetobacter xylinum in static culture was purified by a treatment of seven alkali or alkaline salt respectively and then dried. The water holding capacity, the water reabsorbing capacity, the textural properties and the Fourier transform infrared spectra of BC were analyzed. Changed alkali or alkaline salt and drying methods the change of the water holding capacity were not observed. In addition, it was corLfirmed that the water reabsorbing capacity of BC with freeze- drying method （96.96%） was higher than that with other drying methods. The structure and the textural properties of BC were significantly affected by seven alkali or alkaline salt, and NaOH was the suitable alkali for BC purification.
出处
《食品工业》
北大核心
2013年第7期18-21,共4页
The Food Industry
基金
上海市联盟计划(LM201104)
关键词
细菌纤维素
木醋杆菌
提纯
物性仪
bacterial cellulose
acetobacter xylinum
purification
texture analyser
