CAJ | 학술논문

竹材是一种重要的森林资源,但容易腐朽霉变,在户外使用受到限制.可采用溶胶-凝胶法,在低温条件下制备了TiO_2溶胶,并通过浸渍提拉的方式,完成了竹材的纳米TiO_2改性.同时利用电子核磁共振波谱仪(NMR)、场发射环境扫描电镜(FESEM)、X射线衍射仪(XRD)、X射线能谱仪(EDAX)对TiO_2进行形态和结构表征,重点研究了温度对TiO_2薄膜形态、晶型及抗菌防霉性能的影响.研究结果表明,3种温度(20,60,105℃)处理的TiO_2改性竹材不仅完全保持了竹材的天然颜色、纹理、结构,而且抗菌性能由不具抗菌性变为对大肠杆菌的杀菌率超过99%,防霉性能提高了10倍以上.这种方法有望成为竹材功能性改良的新手段,并对包括木材在内的其他天然生物质材料保护和改良也具有借鉴意义.
죽재시일충중요적삼림자원,단용역부후매변,재호외사용수도한제.가채용용효-응효법,재저온조건하제비료TiO_2용효,병통과침지제랍적방식,완성료죽재적납미TiO_2개성.동시이용전자핵자공진파보의(NMR)、장발사배경소묘전경(FESEM)、X사선연사의(XRD)、X사선능보의(EDAX)대TiO_2진행형태화결구표정,중점연구료온도대TiO_2박막형태、정형급항균방매성능적영향.연구결과표명,3충온도(20,60,105℃)처리적TiO_2개성죽재불부완전보지료죽재적천연안색、문리、결구,이차항균성능유불구항균성변위대대장간균적살균솔초과99%,방매성능제고료10배이상.저충방법유망성위죽재공능성개량적신수단,병대포괄목재재내적기타천연생물질재료보호화개량야구유차감의의.
Bamboo, a kind of forest resources only less important than wood, is especially easy to mildew during outdoor service.In this work, TiO_2 sols were synthesized under low-temperature condition by sol-gel method. The crystalline TiO_2 film with a di-ameter of approximate 40-90 nm was used to coat bamboo at low temperature. The TiO_2 films were characterized by nuclear magnetic resonance spectrometer (NMR), field emission scanning electron microscope (FESEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDAX). The effects of temperature on film crystal forms, its antibacterial, and mildew resist-anee properties were mainly investigated. The results showed that the modified bamboo in low temperature solution (20, 60 and 105 ℃) was mainly covered with anatase nano TiO_2 film. The nano-TiO_2-modified bamboo maintained the natural wood color, texture and structure, and improved its anti-bacterial property from non-anti-bacterial to anti-escherichia coli, and the bactericid-al rate reached over 99%. Meanwhile its mildew resistance property increased over 10 times. So this method is expected to be-come the new way of functional improvement on bamboo, and has the reference meaning for the protection and improvement of wood and other biologic materials.