苝四甲酸标记PVA荧光浆料的制备及其性能

Preparation of fluorescent PTCA labeled PVA size and its properties

为解决目前纺织业中浆液浸透性与被覆性测定方法精准度低、品种适应性差等问题,以聚乙烯醇(PVA)为常用浆料代表,采用不同质量浓度的荧光分子3,4,9,10-苝四甲酸(PTCA)对PVA进行标记,制备出具有不同标记率的PVA荧光浆料并将其对纯棉经纱进行上浆。在制作成浆纱切片后,以荧光显微镜及Photoshop软件为工具,测定出切片横截面各组成部分面积,推算获取PVA浆液对纱线的浸透率和被覆率,同时对比测试了PTCA-PVA与未标记PVA浆纱的强伸、耐磨及毛羽贴服等主要使用性能。结果表明:当PTCA-PVA的标记率摩尔分数为0.0127%时,此改性PVA显示出良好的荧光性能。经PTCA-PVA上浆后,纱线的主要使用性能与未标记PVA所浆纱线的性能较为相近,选取PTCA对机织生产中的主要浆料进行荧光标记可为浆液对纱线浸透性与被覆性的评估提供一种准确度、普适度更高的研究方法。

Aiming at the solution to the problems of low accuracy and poor variety adaptability of the measurement method of the permeability and coating property of sizing paste to warp yarn in textile area at present, and taking polyvinyl alcohol(PVA) as the representative of common sizes, various concentrations of fluorescent molecule-3,4,9,10-perylene tetracarboxylic acid(PTCA) were used to label PVA to prepare PTCA-PVA fluorescent sizes with different degrees of labeling(DL) for the first time. Then the PVA sizes were employed to size pure cotton warp yarns. After preparing the sections of the sized yarns, the area of each component in the cross section was measured by using fluorescence microscope and Photoshop software. The permeability and coating percentage of PVA paste to the yarns were calculated. The main use performances such as breaking strength, wear resistance and yarn hairiness covering of PTCA-PVA and unlabeled PVA sizing were compared and tested. The results show that the PTCA-PVA with an appropriate DL(i.e. 0.0127 mol percent) exhibits good fluorescence property and very similar sizing performance to that of unlabeled PVA. It is considered that fluorescence labeling of main sizing agents used in weaving procedure with PTCA can provide a more universal and accurate way for the determination of the permeability and coating property of the sizing paste to warp yarns.