【作者】 秦瑞平；

【导师】 吕彤；

【作者基本信息】 天津工业大学 ， 应用化学， 2007， 硕士

【摘要】 本文用微乳液界面反应制备了含油溶性颜料、酚醛树脂的纳米核壳微球彩色微乳液，用TEM和激光散射粒度仪测定了微球形态粒径，为80～200nm球形。通过IR和DSC测定了壁材的结构，表明微球外壳为聚脲壳，芯为酚醛树脂。经SEM观察到微球喷涂到电解氧化的铝版基上成膜前后的形念，成膜前为球形；成膜后为团聚片状。成功解决了计算机直接喷墨制版技术的关键—成像液体配制，开发了一种在水基油墨中专用的能热分解的乳化剂，该乳化剂具有良好的乳化性能可以保证墨水的稳定性，在完成喷墨制版后能通过热处理方式失去再乳化作用。使印膜获得亲油拒水性，满足平版印刷的要求。这种系列的乳化剂结构为十二、十八烷基酸没食子脂酸钠，其中十二烷基酸没食子脂酸钠与十二烷基硫酸钠（K12）相比对苯乙烯、26^#白油的乳化能力远远高于K12，乳化苯乙烯能力是K12的2.17倍、乳化26^#白油能力是K12的2.89倍。用表面张力法测定了十二烷基酸没食子脂酸钠的CMC为0.267×10^-3mol／L，γ_CMC为48.0mN／m。最低表面张力在浓度0.810×10^-3mol／L时为29.0mN／m。用TG／DTG研究了乳化剂的热分解性能。在氮气流中。150.02℃开始分解。260℃分解速率最大。在200℃烘箱中10分钟涂膜即可热分解失去亲水基团而不再具有乳化作用，与水接触角达到最大。以这种乳化剂制成的纳米核壳微球彩色微乳液经计算机直接喷墨成像在电解氧化形成砂目的铝版上制成喷墨CTP版，墨点清晰、无散点。并在胶印机上进行了印刷，耐印率达到了两万印。分辨率取决于喷墨打印机。更多还原

【Abstract】 Core-shell colored nanoparticle latex which the core contains oil-soluble pigments and bakelite was prepared by interface microemulsion polymerization technology . Moreover, This paper investigated the effect of short chain alcohol used as co-emulsifier .The configuration was observed with TEM. Particle size and distribution was detected with laser scattering particle size distribution analyzer. This revealed particle size and distribution is 80～200nm. It was also proved the composition of shell material by IR and DSC. About thermal property of core-crust microsphere was studied with DSC. This proved that the microsphere was made up of Polyurea shell and bakelite core. The microsphere state was observed before and after it melted to form film on electrolyte-oxidation aluminium substrate. In the ink jet computer to printing plate system, the key work was image-form liquid .To prepare a water based ink , A special emulsifier was indespensible. Emulsificatio （n-dodecyl and n-octadecanoic acid carboxylate gallate） could be lost n by heat treatment after ink-jet plate making. Its capacity of emulsification to styrene and white oil （No,26^#） was superior than Sodium dodecyl sulfate. Critical micelle concentration was 0. 267 ×10^-3 mol/L detected by surface tension method. Its γ cmc was 48.0mN/m,the lowest surface tension was 29.0mN/m at concentration 0. 810× 10^-3mol/L . Its thermal decompose property was studied with TG/DTG. This revealed when temperature reached 150.02℃ it began to lose hydrophile group and at 260℃ decomposed fastest at N₂ atmosphere. In oven it decompounded in ten minutes at 200℃ this leaded to become lipophilic （contact angle reached 120 ） when it was coated on certain substrates.when the plate was made, its applicability for print was tested on a offset printing press. The version bears achieved twenty thousand copies. However, its resolution depended on the ink jet printer.更多还原