摘要
采用扫描电镜、傅里叶红外光谱和X射线衍射法研究了不同干燥方式对纤维形态及其超分子结构的影响。结果表明:与自然风干条件相比,强制干燥使得纤维变得更加光滑、挺硬,呈现扁平状,降低了纤维的润胀能力。不同的干燥方式不会改变纤维的晶型结构,但对不同模式的氢键的含量却产生了明显影响。与自然风干的纤维相比,强制干燥后纤维分子间氢键O(6)H…O(3')含量明显增加了19.41%,而分子内氢键O(2)H…O(6)和O(3)H…O(5)的总含量降低了17.52%。而对X射线衍射峰进行分峰拟合处理,发现经过强制干燥的纤维002晶面的晶面尺寸、纤维的结晶度和微晶横截面积均明显增大。
The effect of drying method on the fiber morphology and supramolecular structures was studied by SEM, FTIR spectroscopy and X-ray diffraction. After forced drying, the fibers became more connected and the fiber swelling capacity decreased compared with the fibers of air dry condition. It was shown by FTIR that the style of crystal structure did not change, but the proportion of different models of the hydrogen bonds significantly changed with different drying condition. It is clear that the content of inter-molecular hydrogen bonds О （6）Н...О （3′） increased by 19.41% with forced drying condition compared with the air drying condition, while the content of intramolecular hydrogen bonds О （2） Н...О （6） and О（ 3 ） Н... О（ 5 ） decreased by 17.52%. There was an obvious increase in the average width of erystallite size, the crystallinity and the cross-sectional area with the forced drying condition which was found by using deconvoluting XRD spectra of eucalyptus fibers.
出处
《造纸科学与技术》
北大核心
2013年第6期1-5,共5页
Paper Science & Technology
基金
国家自然科学基金(31170551
31200458)
国家教育部博士点基金(20110172110015)
广东省高校优秀青年创新人才培养项目(LYM10014)
中央高校基本科研基金(2012ZZ0050)
广东省科技计划项目(2010B010900026)
