Using ultrasonic treatment on wood veneer dyeing

The purpose of this research is to change the microstructure of wood using ultrasonic processing, increase the connectivity between pores in the cell to improve the permeability of the wood; ultrasonic cavitation dye in the wood veneer by the instinstantaneous temperature, high pressure, high jet role in the infection rate has been markedly improved. In the same time under the conditions of the veneer Ultrasonic assisted dyeing dye than conventional high temperature dip. Veneer dyeing dye uptake an yeing rate increases with the enhancement of ultrasonic vibration time increases with the increase of dye concentration increased with the improvement of the dyeing temperature increase. With solid mu fu joins a floor board and furniture industry on dyeing timber demand increases, more than 3 mm thickness of the single homogeneous dyeing problem due to the increasingly prominent in wood for dye solution to move or penetrating horizontal channel is few, the greater the thickness of wood dyeing the more difficult to dye penetration of wood dyeing essence is dye in wood of infiltration and fixed with two process, if the wood permeability good, dye in sessile former is easy to reach inside and outside a uniform color. Dye penetration performance depends on the types of wood and its state dye molecular size and physical and chemical properties of medium physical and chemical properties and dyeing external conditions. Wood dyeing process is dye solution in wood surface wetting diffusion adsorption, and dye solution to wood internal penetration and fixation process. The lumber size is big, dye molecules in the wood mobile and penetration depth is the key to real wood dyeing. This study adopts ultrasonic auxiliary dyeing is the use of ultrasonic cavitation to change the wood conventional dyeing auxiliary dyeing to achieve the purpose of the article. Materials and methods Experimental material Wood Oak veneer (100 mm 100 mm 1.3 mm) 36 piece from the forest Jiao river. Agent Acid lake blue, penetrating agent sodium sulphate (Na2SO4· 10 h2o), all stain (NaCl). Instrument ltrasonic cleaning apparatus (origin: kunshan), TU 1810 uv-vis spectrophotometer (origin: Beijing general analysis universal instrument co., LTD.), 722 n visible spectrophotometer (origin: Shanghai save division instrument table co., LTD.),etc. Test method Veneer pretreatment Preparation 0.3% NaOH solution installed in 2000 ml beaker, beaker placed in water bath pot heating, until the temperature reaches 80 warm after temperature to the oak veneer completely submerged in NaOH solution, cooking 3 hours after treatment out put into this drying oven drying to moisture content 12 (1) %. Ultrasonic auxiliary dyeing This experimental design three kinds of pretreatment process for: (1)Different dyeing time the veneer of ultrasonic auxiliary dyeing test after drying to the thickness of 1.3 mm oak veneer as test materials, in the dye solution concentration was 0.1%, bath ratio for 1:30, in the dyeing temperature respectively for 70, 80 and 90 under the condition of cooking 12 hours for 12 hours 2 cycle of ultrasonic auxiliary dyeing. (2)Different shock time of ultrasonic auxiliary dyeing test after drying to the thickness of 1.3 mm 1419 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT-2012) Published by Atlantis Press, Paris, France. © the authors thick oak veneer as test materials, in the dye solution concentration was 0.1% temperature for 80, bath ratio for 1:30, at every hour shock time respectively for 10 min 20 min and 30 min under the condition of cooking 12 hours for 12 hours 2 cycle of ultrasonic auxiliary dyeing. (3) Different dye solution concentration of ultrasonic auxiliary dyeing test after drying to the thickness of 1.3 mm ring oak veneer as test materials, in the dye solution concentration were 0.05%, 0.1%, 0.15%, temperature for 80, bath ratio for 1:30, cooking 12 hours for 12 hours 2 cycle of ultrasonic auxiliary dyeing. Dyeing rate measurement The dye uptake rate defined as: