| Summary: | 碩士 === 逢甲大學 === 紡織工程所 === 92 === Nowadays, nano-sized pigment was applied widely on high delicate color image products as like colorful ink jet printer and color filter of TFT-LCD. Those relative researches were mostly investigated into the stability of nano-sized pigment. And the results had been pretty good achievement. But nano-sized dyestuffs were seldom studied or seen on the reports. In this study, three kinds of disperse dyes were chosen. It included red, blue and yellow color. Fourteen non-ionic surfactants belonged to polyethylene glycol type were used as dispersants. These dispersants had four different hydrophobic groups. The relationship between surfactant structure and system stability after media milling dispersion by preparation of nano-sized particles was discussed. We expected that it could provide some experience of new technology and apply in the heat-transfer printing technology. Especially making pattern had more colorful hues. And it could be helpful to increase the competition of dying and finishing industries of Taiwan.
From the results of experiments, we found out several situations below：
(1) Choosing fourteen non-ionic surfactants individually dispersed in three different kinds of disperse dyes (C.I. Disperse Red 60, C.I. Disperse Yellow 54 and C.I. Disperse Blue 56). The surfactant that had oleyl ether as hydrophobic group and hydroperoxy ending (COL series), the dispersion of dye solution had best effect.
(2) The value of transmittance T% was also lower when the HLB value of the dispersant was lower. When HLB value was equal to 5.5, we could get the lowest value of transmittance T%. About EO-mole number, the distribution of transmittance T% to EO-mole number had a similar tendency as like that of HLB value. The transmittance T% was lowest when EO-mole equaled 2 moles. Besides, when the dispersant had oleyl ether hydrophobic group and hydroperoxy ending, the best dispersion could be gotten.
(3) Disperse dyes solution which added the non-ionic surfactant COL020 0.027g could get the lowest transmittance T%. We could find the aggregation situation of disperse dye was not evident.
(4) Besides transmittance T% value, we could measure zeta potential value to realize the surfactants are working or not. Zeta potential analysis could be used to realize the electrical charge characteristic and aggregation condition in dispersed solution. It could be powerful evidence in this study.
|
|---|
