【作者】 张毅；

【导师】 李祥高；

【作者基本信息】 天津大学 ， 应用化学， 2006， 硕士

【摘要】 激光打印机有机光导体的导电涂层是一种取代有机光导体铝基表面镜面加工工艺和阳极氧化工艺的技术。它避免了大量废酸废碱的产生,同时也能有效地降低生产成本。本文主要研究内容如下。（1）以二氧化钛为基体,采用化学共沉淀技术将SnO₂和Sb₂O₃的复合物包覆在其表面制备导电粉末。正交实验表明当共沉淀体系的pH=1.5 ,m（TiO₂）:m（SnCl4）:m（SbCl3） =25.0:15.0:1.0,水解温度为60℃、焙烧温度为700℃时得到的复合导电粉末电阻率最低,为88??cm,复合导电粉末的粒径≤200nm。（2）以氯化氢为催化剂,2-巯基乙醇为助催化剂,以苯酚和环己酮为原料,甲苯为溶剂,经缩合反应合成1,1-二（4-羟基苯基）环己烷。适宜的反应条件为:n（苯酚） :n（环己酮） :n（2-巯基乙醇）=20:5:1,在30℃下氯化氢气体（0.16mol/h）通入时间为5h,总反应时间为7h。产物（双酚Z）收率达97.28%,HPLC（面积归一）纯度高于98.13%。按照上述投料比,在反应温度为30℃制备1,1-二（3′-甲基-4′-羟基苯基）环己烷,在反应温度为0℃制备1,1-二（4′-羟基苯基）环戊烷和1,1-二（3′-甲基-4′-羟基苯基）环戊烷,收率分别达到了75.9%、67.09%和74.15%,产物的HPLC纯度都高于98%,并用红外光谱、紫外光谱、质谱对产物结构和组成进行了鉴定。（3）以氢氧化钠为催化剂,双酚Z和多聚甲醛在无水乙醇中进行缩聚反应, 80℃回流反应4h;双酚Z、多聚甲醛、氢氧化钠的摩尔比为5:20:1,双酚Z与无水乙醇的配比为1:800（mol/V）。制备的双酚Z线型酚醛树脂分子量为4750,固含量为79%。（4）将此导电粉末与树脂基体经球磨,在铝板上涂布制备导电涂层,研究了复合导电粉末用量与导电涂层体电阻率的关系,同时对涂层的平整性和耐溶剂性进行了考察。结果表明m（玻璃珠）:m（酚醛树脂）:m（导电粉末）: m（钛酸四丁酯）=150:30:15:1,m（玻璃珠）:v（无水乙醇）=1:1,球磨2h（300r/min）得到的导电涂布液具有良好的流动性,,制备的导电涂层具有良好的耐溶剂性,其体电阻率为1.58×108?·cm,膜厚12μm。满足制备激光有机光导体的铝基的工艺要求。更多还原

【Abstract】 The paper aim at prepare a kind of conductive coating use on aluminium-base of organic photoconductor of laser printer. The technology will take place mirror process and anode oxidation use on this aspect in our country. It will reduce produce coast when it avoid a lot of waste acid and waste alkali. The prepare process include four part:（1） Composite conductive powder with Titanium dioxide powder covered by SnO₂ and Sb₂O₃ was prepared by the chemical coprecipitation technology. The results showed that when the ratio of TiO₂ to SnCl4 to SbCl3（by weight） is 25.0:15.0:1.0, pH value of hydrolysis solution is 1.5, hydrolysis temperature is 60.0℃and calcinations temperature is 7.0×102℃, the powder’s volumetric electric resistivity is 0.077×103??cm and the diameter of conductive powder is below 200nm. At the same time, the paper disclose the effect of process factors on volume resistivity of conductive powder.（2） An improved process of synthesis of 1,1-bis-（4′-hydroxyphenyl）–cyclo hexane、1,1-bis-（3′-methyl-4′-hydroxyphenyl）–cyclohexane、1,1-bis- （4′- hydroxyl phenyl）–cyclophentane、1,1-bis-（3′-methyl-4′- hydroxyphenyl）–cyclo phentane through condensation reaction of phenol or o-methylphenol and cyclohexanone or cyclophentanone using chlorine hydride as catalyst and thioglycol as co-catalyst was developed. At the optimum synthesis conditions: the ratio of phenol to cyclic ketone to thioglycol （by mole） is 20:5:1, their HPLC purities were high than 98.1251%,and their yields are 97.28%、75.9%、67.09% and 74.15% respectively. IR、UV and MS were used to determine the structure and purity of the products.（3） An process of synthesis of phenolic resin through condensation reaction of 1,1-bis-（4′-hydroxyphenyl）–cyclohexane and paraformaldehyde using sodium hydroxide as catalyst. At the optimum synthesis conditions: the ratio of 1,1-bis- （4′-hydroxyphenyl）–cyclohexane to paraformaldehyde to sodium hydroxide is 5:20:1. The phenolic resin molecular weight is 4750 and solid content is 79%.（4） Conductive coating was then prepared on aluminum alloy substrate with phenolic resin as the binder. The results of the experiments show that the coating of most excellent fluiding and solvent resistance under the preparation conditions: m（glass bead）:m（phenolic resin）:m（composite conductive powder）: m（titanium tetra-n-butoxide）=150:30:15:1,m（glass bead）:m（anhydrous alcohol） =1:1,ball milling2h（300r/min）.The performance of the conductive coating such as volume resistivity and the thickness of the coating has met the demand of application in OPC of laser printer.更多还原