竹材/酚醛树脂胶合界面的荧光跟踪定位表征

Fluorescent Tracking Characterization of Glue Interface Between Bamboo and Phenol Formaldehyde Resin

采用3种不同荧光染色剂,对酚醛树脂胶合的漂白竹材胶合界面进行定位染色跟踪;应用图像分析处理技术,对其进行RGB和ISO Intensity的色彩模拟胶黏剂分布.结果表明:甲苯胺蓝染色后,酚醛树脂与基材的色彩强度差异显著,界面对比效果最佳.以甲苯胺蓝染色剂的浓度和染色时间为变化因素,各取3个水平变量,对漂白竹材胶合界面进行灰度差异值优化处理,并进行对比实验,结果表明漂白竹材在染色剂浓度为0.5%,染色时间为30min时,达到最优值.同时用3D灰度图形表征证实在此条件下胶黏剂与基材立体方向上灰度值差异的显著性,胶黏剂在界面上的平均渗透深度为54.18μm.

The bonding interface of bleaching bamboo bonded with phenol formaldehyde resin was stained and tracked using three kinds of fluorescent dyes,and its fluorescence microscopic pictures were obtained.RGB and ISO intensity value simulation with image analysis technology showed that toluidine blue stained the interface best and led to significant contrast between the bamboo block and the cured phenol formaldehyde resin.Then the variables of toluidine blue concentration and staining time,with three levels each,were optimized by the gray value diversity of interface evaluation,and the optimal parameters were shown to be 0.5% and 30 min,respectively.Three-dimensional gray image characterization also confirmed that under these conditions the gray values between the adhesive and the substrate were significantly different and the average penetration depth was 54.18 μm.