微波辐射法合成壳寡糖/有机累托石纳米复合材料及性能研究

Synthesis and property of chitosan oligosaccharide/organic rectorite nanocomposites by microwave radiation

采用高效快速的微波辐射法制备了壳寡糖/有机累托石(CTOOR)纳米复合材料,其中壳聚糖(CTS)经酶解处理得到低分子量壳寡糖(CTO),累托石(REC)用Gemini 18-3-18进行有机改性。用场发射扫描电子显微镜(FESEM)、红外光谱(FT-IR)、X射线衍射(XRD)、Zeta电位分析表征了该纳米复合材料的微观形态和结构,比较了其与单一组分CTO热稳定性和抗菌性能的差异。结果表明,CTO插层进入有机累托石(OREC)层间,扩大了其层间距;CTO与OREC发生氢键和静电的相互作用;CTOOR的热稳定性及抗菌能力均优于CTO。

In order to improve efficiency, the microwave irradiation method was used to prepare chitosan oligo- saccharide/organic rectorite nanocomposites （CTOOR）. Chitosan oligosaccharide was obtained after enzymolys- is and rectorite （REC） was modified with Gemini 18-3 18. A study on the morphologies and structures of CTOOR was conducted through field emission scanning electron microscope （FESEM）, Fourier transform in frared spectroscopy （FT-IR）, observation of X-ray diffraction （XRD） and zeta potential analysis and the ther- mal stability and antibacterial activity of CTOOR and CTO were compared. The results indicated that： CTO was inserted into the silicate layers to form the intercalated nanocomposites, the interlayer distance of OREC was magnified; there were hydrogen bonding and electrostatic interaction between CTO and OREC; both of the thermal stability and antibacterial activity of CTOOR were stronger than that of CTO.