对木醋杆菌产细菌纤维素原位复合间隔织物的结构进行了研究,以自生长的方法将细菌纤维素填充在间隔织物内部制备细菌纤维素/间隔织物复合材料。利用紫外-分光光度计测定菌种浓度,采用扫描电子显微镜、毛细管流动孔径分析仪和滤料综合性能测试等技术分别对复合材料的形貌、孔结构及过滤性能进行了表征和研究。结果表明,木醋杆菌产细菌纤维素可以有效地填充在间隔织物中间层的空隙部分,并保持其原有的纳米网状结构,细菌纤维素与间隔丝之间具有良好的包覆作用,能够形成稳定的立体结构。分析结果表明:细菌纤维素/间隔织物复合材料的孔径分布均匀,平均孔径为377nm;复合材料对粒径≥2.0μm的微尘颗粒的过滤效率达99.681%,是具有应用潜能的过滤分离材料。
The structure of bacterial cellulose nanofiber with xylinum in-situ composite spacer fabric was studied.Three-dimensional integral composite filter materials were prepared by self-organized growth method with nanofiber.The spacer monofilament was wrapped in nanofibers as scaffold.The strain concentration was determined by using UV spectrophotometer.Analytic techniques of scanning electron microscopy(SEM),porous materials analysis and test-board were utilized for characterizing the interface morphology,pore size and filtration property.The results showed that network of nanofiber was filled with middle layer of spacer fabric,and monofilament was kindly enclosed.Pore analysis results indicated that the composites had uniform pore distribution with 377nm average diameter.The filtration results showed that filter efficiency to the particles larger than 2.0μm was 99.681%.The method to compound was innovative to prepare composites with excellent structure for filtration.The presented study indicated that microorganism self-grow to composite had a great application potential in the field of separation and filtration.
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基金资助
江苏高校优势学科建设工程资助项目(苏政办发[2014]37号)
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