摘要
本文叙述了傅里叶变换红外光声光谱法(FTIR-PAS)的基本原理及其在纺织上应用。研究了组合浆料中变性聚乙烯醇的定量测定、涤棉混纺纤维中涤纶的定量测定、苎麻及甲壳素经碱处理后的光谱性质的变化。研究结果表明,以变性聚乙烯醇C=O基团的伸缩振动1570cm^(-1)吸收峰可作为定量测定变性聚乙烯醇的依据。以涤纶分子结构中羰基伸缩振动1725cm^(-1)峰高与纤维分子结构中碳氢键伸缩振动2915cm^(-1)峰高的比值,可定量测定涤棉混纺纤维中涤纶含量。苎麻经碱处理后,非晶谱带898cm^(-1)度明显增加,晶区谱带1430cm^(-1)强度明显下降,其变化程度取决于碱浓度。甲壳素的酰胺吸收峰1555cm^(-1)随碱处理浓度、温度和时间的增加而下降。与常规的红外吸收光谱法相比较,傅里叶变换红外光声光谱法具有无损快速的优点,适宜于制作困难的试样。
The basic principle and application in textile industry of fourier transform infrared photoacoustic spectroscopy (FTIR-PAS) have been described. The quantitative determination of modified polyvinyl alcohol in size blend and of polyester in cotton-polyester fiber blend, and the change in spectra of ramie fiber and chitin treated with alkali have been investigated. The determination of modified polyvinyl alcohol is base on the band area at 1575 cm-1 of the stretching vibration of carbonyl bond. The analysis of polyester in fiber blend is based on the ration Of the band height at 1725 cm-1 of stretching vibration of carbonyl bond in polyester to the band height at 2915 cm-1 of stretching vibration carbon-hydrogen bond. When the ramie fiber is treated with alkali, the non-crystalline band at 898 cm-1 obviously increases in height, while the crystalline band at 1430 cm'1 distinctly decreases in height. The extent of change depends on the alkali concentration. The amide band of chitin at 1555 cm'1 decreases with the alkaline concentration, temperature and time. The technique of fou-rier transform infrared photoacoustic spectroscopy, compared to the general infrared spectroscopy, has the advantage of non-destructivencss of sample and rapidness.
出处
《中国纺织大学学报》
CSCD
1994年第4期70-79,共10页
Journal of China Textile University
关键词
红外光声光谱
傅里叶变换
纺织科学
fourier transform spcctroscopy, size, fiber, ramie, chitin
infrared photoacoustic spcctroscopy.
