菠萝叶纤维素超级微晶的制备及其结构特性的研究

Preparation and characterization of super microcrystalline from Pineapple leaf fiber

对菠萝叶纤维分别通过NaOH、HNO3、HCl进行预处理，然后用64％H2SO4水解，运用扫描电镜、透射电镜、Zeta电位一粒度分析仪、红外光谱和x射线衍射对其结构与特性进行表征。结果表明，可制备出长度分布为300—700nm，直径分布约为20～50nm的棒状菠萝叶纤维素超级微晶；与原纤维素相比，菠萝叶纤维素超级微晶的晶型仍为纤维素I型，但结晶度由57．8％增加到82．7％。

Pineapple leaf fiber was pretreated by sodium hydroxide, Nitric acid, Hydrochloric acid and hydrolyzed by 64% Sulfuric acid, super microcrystalline cellulose was gotten.The structure and properties of microcrystalline cellulose was characterized by Scanning electron microscopy （ SEM）, Transmission electron microscopy （ TEM）, Zeta potential and particle size analyzer, Fourier transform infrared chromatography （FTIR） and X- ray diffraction （XRD）.The results showed that the length and diameter distribution of super microcrystalline cellulose was 300- 700nm and 20~50nm.The type of super microcrystalline cellulose was cellulose I,degree of crystallization was rised from 57.8% to 82.7%.