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標題: 溶媒對合成隱性有機顏料影響之研究
The Study on the Effect of Solvent Properties in the Preparation of Latent Pigment from Diketopyrrole
作者: 蘇嘉榮
Su, Chia-Jung
關鍵字: Latent pigment;溶劑效應;Solvent effect;organic pigment;diketopyrrolopyrrole;有機顏料;吡咯並吡咯二酮顏料
出版社: 化學工程學系所
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由文獻可知一般改質方法回收率過低,故提高隱性顏料的回收率以提高其應用性為本研究之目的。由於溶劑對顏料分散之穩定度及化學改質反應是ㄧ重要因素,故本研究針對不同溶劑的極性及體積大小和其對顏料分散的穩定度對改質回收率的影響做ㄧ系統之討論。本研究所選用的溶劑包含下列三種:chloroform、Tetrahydrofuran(THF)、Propylene glycol monomethyl ether acetate(PGMEA)。此三種溶劑的極性以chloroform最大,THF次之,PGMEA最小;而分子體積則以PGMEA最大,THF次之,chloroform最小;在溶劑對顏料分散之穩定性方面,以chloroform最佳,THF次之,PGMEA最差。實驗結果顯示,隨著溶劑對顏料分散的穩定性增加及其極性增加、分子體積較小可以有效地增加隱性顏料Boc-DPP的回收率。此外,隱性顏料Boc-DPP分散於壓克力型樹脂(acrylate type binder)中時,可經由加熱方式還原成母體顏料DPP,藉由SEM分析結果顯示,其還原成之母體顏料的粒子於薄膜中可分散均勻,粒徑約30~50 nm。

Organic pigments are used as colourants in paints, plastics, printing inks, and electronics industries. Organic pigments are insoluble in solvent, whereas dyes can easily be dissolved in solvent as uniform coloring agents. The technology of “latent pigments” can crucially improve dispersion process. This technique enables to make the convention pigment into latent pigments with properties similar to dyes which are soluble in organic solvents. The latent pigments can be transformed to the parent pigment by thermal treatment.
The purpose of this study is to improve the recovery yield of making latent pigments. Because the the dispersive stability and chemical modification is an important factor, this study emphasize on the issues of latent pigment recovery yield, product polarity, molecular volume, and dispersive stability in solvents. Three solvents, chloroform, tetrahydrofuran (THF); and Propylene glycol monomethyl ether acetate (PGMEA) have been studied. The relative polarity of three solvents is chloroform>THF>PGMEA; the magnitude of molecular volume is PGMEA>THF>chloroform; and the degree of dispersive stability is chloroform>THF>PGMEA. The results show the recovery yield of Boc-DPP latent pigment increases with fine dispersive stability, high polarity, and low molecular volume of solvent. In addition, the Boc-DPP can be converted back to DPP by thermal process in acrylate resin. After the dispersion procedures, the DPP pigment are found to be well-dispersed in the membrane, and the particle size is about 30~50 nm by FESEM.
其他識別: U0005-0502200814155400
Appears in Collections:化學工程學系所

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