高级检索
    曲萍, 王璇, 白浩龙, 张力平. 纳米纤维素表面烷基化特性的研究[J]. 北京林业大学学报, 2014, 36(1): 121-125.
    引用本文: 曲萍, 王璇, 白浩龙, 张力平. 纳米纤维素表面烷基化特性的研究[J]. 北京林业大学学报, 2014, 36(1): 121-125.
    QU Ping, WANG Xuan, BAI Hao-long, ZHANG Li-ping.. Surface alkylation characters of cellulose nanofibrils.[J]. Journal of Beijing Forestry University, 2014, 36(1): 121-125.
    Citation: QU Ping, WANG Xuan, BAI Hao-long, ZHANG Li-ping.. Surface alkylation characters of cellulose nanofibrils.[J]. Journal of Beijing Forestry University, 2014, 36(1): 121-125.

    纳米纤维素表面烷基化特性的研究

    Surface alkylation characters of cellulose nanofibrils.

    • 摘要: 用表面烷基化的方法降低纳米纤维素表面的亲水性,并通过傅里叶红外光谱、X 射线衍射、X 射线光电子能 谱、扫描电子显微镜及能谱分析对烷基化后的纳米纤维素进行了测定。结果表明:KH鄄570 和纳米纤维素之间发生 了偶联反应,随着偶联剂浓度的升高,纳米纤维素的结晶度先下降后上升;硅醇或部分缩合的硅醇包覆在纳米纤维 素的表面,从而使烷基化纤维素的碳氧比下降;烷基化能使纳米纤维素表面的羟基量减少,降低了纳米纤维素表面 的亲水性;硅烷偶联剂与纳米纤维素发生了偶联反应,且反应程度一致,纳米纤维素表面烷基化均一。

       

      Abstract: Surface alkylation was used to improve the hydrophilcity of cellulose nanofibrils. Fourier transform infrared spectrum fourier, X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscope analysis and energy diffraction spectrum were applied to test the alkylated cellulose nanofibrils. The results showed that coupling reaction occurred between KH-570 and cellulose nanofibrils; the crystallinity of cellulose nanofibrils fell first and then increased a little with the coupling agent concentration increased. The surface of cellulose nanofibrils was covered by silicon alcohol or partial condensation silicon alcohol. And the carbon-oxygen ratio of alkylated cellulose nanofibrils decreased. There were less hydroxyl groups in alkylated cellulose nanofibrils than in cellulose nanofibrils. SEM shows that MEMO reacts with cellulose nanofibrls homogeneously.

       

    /

    返回文章
    返回