Study of PLA Fabrics Dyeing

• Main Authors: Huei-Shan Lai, 賴慧珊
• Other Authors: 黃國賢
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/24469583852680110796

碩士 === 崑山科技大學 === 綠色材料研究所 === 98 === The purpose of this experiment is to study the addition of the plasticizer in the dyeing process of polylactide fabrics, and to use the related equipment such as optical emission spectrometer, weather meter and sublimation tester to analyze and test the associated natures to explore the impact on the dyeing of PLA fabrics because of the addition of plasticizer. From the results of the experiment, we first know that the testing of DSC shows the addition of plasticizer-TBC (Tributyl citrate) will cause the glass transition temperature of PLA fabrics, the cold crystallization temperature and melting point to decrease because of the increasing of TBC concentration. With the increasing of TBC concentration, PLA molecules move faster and the behavior of molecular chain piling up and forming crystallization becomes frequent, and it is easier to form complete crystallization. Therefore, there will be much more complete crystallization in the melting endotherms of PLA, which makes the ΔHm of PLA increase as TBC concentration increases. Besides, the addition of TBC deepens the dyeing condition of PLA fabrics under low temperature (80℃). The dyes and TBC at 80℃, 90℃ and 100℃ will interact with each other. It is known C.I Disperse Red 82 and C.I Disperse Orange 30, will interact with TBC and causes blue shift to λmax, which then makes the fabrics become bluish and greenish in cooler after dyeing. On the contrary, C.I Disperse Blue 79, after interacting with TBC, will cause red shift to λmax, which then makes the fabrics become reddish and bluish in color after dyeing. In the aspect of water repellency, the fabrics, after washing 10 times, still maintain good color fastness to washing that reaches about level 4-5. And in the aspect of color fastness to light, C.I Disperse Orange 30 is the most superior among the three dyes. As to the color fastness to sublimation, PLA fabrics unstability on high temperature and starts to melt when the temperature is higher than 130℃, and the disperse dyes start to sublime at high temperature (at 150℃～250℃). Therefore, at 130℃, the color fastness to sublimation is nearly unchanged and stays at level 5.