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首页> 外文期刊>Journal of Applied Polymer Science >Silk grafting with methacrylamide: A near-infrared spectroscopy study
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Silk grafting with methacrylamide: A near-infrared spectroscopy study

机译：甲基丙烯酰胺接枝丝：近红外光谱研究

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摘要

The grafting of methacrylamide (MAA) onto silk has taken importance not only as weighting process but also as finishing operation to improve the properties of the silk fibers. It was confirmed that the MAA monomer concentration, the initiator amount, and the liquor ratio are the major parameters affecting the yield of the reaction. Varying these parameters, a large number of samples, i.e., silk yarns with different grafting yields and exhaust grafting baths with different residual MAA concentrations, were obtained. Near infrared (NIR) spectroscopy was used for the quantitative determination of MAA in silk yarns and MAA in exhaust baths after grafting. A correlation between silk yarns grafting yield and NIR spectra of MAA grafted yarns was obtained. This correlation shows a coefficient of determination (R~2) of 0.96 and a standard error of calibration (SEC) of 8.37 w/w for a mean value (M) of 31.82% w/w. A second correlation between MAA in exhaust grafting baths and NIR spectra was obtained. This correlation shows a R ~2 of 0.95 and a SEC of 2.93 g/L for a M of 17.16 g/L. Previous correlations were improved using silk samples cleaned by extraction of sizing agents and detergents which could interfere with MAA grafting and modify absorption spectra of bath solutions.
机译：甲基丙烯酰胺（MAA）接枝到丝绸上不仅作为增重过程而且对于改善丝绸纤维性能的整理操作都具有重要意义。证实MAA单体浓度，引发剂量和液比是影响反应产率的主要参数。通过改变这些参数，可获得大量样品，即具有不同接枝产率的蚕丝纱线和具有不同残留MAA浓度的排气接枝浴。近红外（NIR）光谱用于定量测定丝线中的MAA和接枝后排气浴中的MAA。获得了真丝接枝收率与MAA接枝纱的NIR光谱之间的相关性。这种相关性表明，对于平均值（M）为31.82％w / w，确定系数（R〜2）为0.96，校准标准误差（SEC）为8.37 w / w。获得了排气接枝浴中MAA与NIR光谱之间的第二种相关性。这种相关性显示M值为17.16 g / L时，R〜2为0.95，SEC为2.93 g / L。使用可通过上浆剂和去污剂提取而清洗的丝绸样品，可以改善以前的相关性，因为上浆剂和去污剂可能会干扰MAA的接枝并改变浴液的吸收光谱。

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