阴极电泳涂料用颜料分散树脂及颜料浆的研制

采用多异氰酸酯制备一种季铵化剂,该季铵化剂和环氧树脂反应制备含有季铵盐基团的阳离子颜料分散树脂及颜料浆。本文研究了TDI单体类型、环氧树脂分子量、IO封闭TDI摩尔比例对颜料分散树脂水溶性、分散性及颜料浆稳定性的影响,并对颜料分散树脂和颜料浆的性能进行测试,结果表明:该颜料分散树脂对颜料具有优异的分散效果;该颜料分散树脂和常见颜料分散研磨而成的颜料浆贮存稳定性、施工稳定性性能优异,该产品具有良好的市场应用前景。     

非离子表面活性剂存在下光催化降解有机颜料

研究了加入非离子表面活性剂OP-10时有机颜料光催化降解过程,实验选用的颜料为艳红6B(C.I.Pigment Red482),以高压汞灯为光源,TiO2为催化剂.通过改变水溶液的pH值和OP-10的浓度,考察了颜料和OP-10各自的降解特性.实验结果表明,酸性条件下,OP-10的存在明显加快了颜料的降解,碱性条件下反而抑制了颜料的降解.中性条件下,OP-10的增溶对体系的降解有一定影响,浓度为0.126g/L(2.5cmc)时,颜料和OP-10降解效果最好.     

聚合物分散剂中锚定基团含量对颜料紫23分散性能影响

聚合物分散剂主要通过锚定基团吸附在颜料表面而起到稳定作用,锚定基团含量会影响到分散剂的吸附效果,进一步影响到颜料的稳定。本文采用溶液聚合法以苯乙烯和端羟基聚乙二醇甲基丙烯酸酯(HO-PEG-MA)为原料,通过改变两者的加入比例来制备不同含量苯基为锚定基团的聚合物分散剂,用于有机颜料紫23的分散稳定,并对研磨后色浆的粒径、吸附量、储存稳定性等进行了测试。结果表明,苯乙烯和端羟基聚乙二醇甲基丙烯酸酯加入的摩尔比为3:1时,稳定效果最好,研磨后粒径可达到为191.3 nm,且储存稳定效果好。     

高分子型炭黑分散剂的合成及其性能研究

研究了嵌段型分分子颜料分散剂的合成及其有炭黑分散体系中的分散稳定作用。结果表明，高分子嵌段分散剂在炭黑分散体系中能明显改善分散稳定性。同时发现，嵌段分散剂的组成、结构及分子量对分散作用有综合影响。     

季铵盐型阳离子聚合物的合成及其在超细颜料中的应用

采用自由基溶液聚合,制备了甲基丙烯酰氧乙基三甲基氯化铵-苯乙烯-甲基丙烯酸甲酯三元共聚物,并用此阳离子聚合物作为分散剂制备超细有机颜料分散体系。用FT-IR和13C-NMR分析、表征了共聚物的结构,用GPC研究了聚合物的分子量及分子量分布,用滴定法测定了聚合物中阳离子单体含量。结果表明:聚合物的结构及用量对颜料分散体系的影响较大,当聚合物中阳离子单体含量为59.5%-69.7%,mAIBN/mM=0.010-0.012时,颜料的粒径最小且体系的稳定性最好,阳离子聚合物质量分数大于0.004时,分散体系的分散性能较好。     

水溶性分散剂的合成及其性能研究

合成了苯乙烯－顺丁烯二酸酐共聚型水溶性分解剂，并讨论了这种分散剂对导电粉及炭黑等难分散颜料的分散稳定性作用。结果表明，在水介质中，该发散剂能明显改善导电粉和炭黑颜料的分散稳定性。     

纳米银/丙烯酸树脂水性墨水的制备

以电子加速器为辐射源、草酸银为银源,通过辐射还原法制备了清洁的纳米银粉,并将此纳米银产物不经分离提纯直接与丙烯酸树脂复合制备了水性墨水。作为对比,采用典型的化学还原法制备相同粒径的纳米银,经多次分离提纯后再与丙烯酸树脂复合制备水性墨水。采用场发射扫描电镜(SEM)与热重分析仪(TG)表征银粉的形貌及清洁性,并用万用表测试墨水涂层的导电性。结果表明,相比于化学法,辐射还原法制备的纳米银可直接与丙烯酸树脂复合得到水性墨水,该墨水具有良好的分散稳定性,固化后导电性优良,与基体有较强的附着力。     

添加剂对有机颜料光催化降解的影响

 研究了(NH4)2S2O8,H2O2和表面活性剂十二烷基苯磺酸钠(DBS)对TiO2光催化降解颜料艳红6B的影响. 结果表明,(NH4)2S2O8的加入可提高颜料艳红6B的降解速率,以酸性及近中性条件较为适宜; H2O2的加入也可提高颜料艳红6B的降解速率,并可提高TiO2的重复使用次数; DBS的加入可降低颜料艳红6B的降解速率,但颜料艳红6B在酸性和碱性条件下降解较中性条件下快. DBS在中性条件下降解较快. 颜料艳红6B与DBS二者之间存在密切的共降解关系. 随着DBS浓度的增加,颜料艳红6B和DBS的降解速率均逐渐降低.     

聚氨酯改性不饱和聚酯/色浆复合体系的固化特性

系统研究了聚氨酯改性不饱和聚酯/色浆复合体系的黏度与固化特性,发现随着色浆含量的增加,复合体系的黏度呈递增趋势,但明显低于理论加和值;而复合体系的凝胶时间、表观起始固化温度与表观峰值固化温度随着色浆含量的增加而增加,但表观终止固化温度与固化热焓却降低;随着升温速率的增大,复合体系的特征固化温度均向高温方向移动,但固化热焓基本不变.将升温速率外推至零,可计算出体系的起始固化温度、峰值固化温度以及终止固化温度,从而确定体系的固化工艺.同时基于不同升温速率下的表观峰值固化温度,通过Kissinger方程可计算得到聚氨酯改性不饱和聚酯/色浆复合体系的固化反应表观活化能以及固化反应动力学指前因子.在最佳固化工艺条件下,聚氨酯改性不饱和聚酯树脂/色浆复合涂层的黏附力均在一级以上.     

聚醋酸乙烯类梳型分散剂的制备与表征

颜料在工业生产和人们的日常生活中起着重要的作用.由于颜料颗粒具有较大的比表面积和较高的比表面能,是热力学不稳定体系,当分散在介质中时容易发生团聚,影响其特性的发挥[1],因此需加入分散剂使其在分散介质中稳定分散.     

裂解气相色谱法分析蓝色中性笔字迹的书写墨水种类及墨迹随书写时间的变化规律

中性笔是当前比较流行的一种书写工具,其墨水多采用颜料作为色料成分,很难用水和有机溶剂进行提取,故无法利用分析圆珠笔油墨和水性笔墨水所采用的气相色谱或高效液相色谱等方法进行检验。目前在法庭科学领域内还没有一种有效的方法用于分析中性笔字迹的书写墨水。采用裂解气相色谱法分析了蓝色中性笔字迹的书写墨水,根据色谱峰的个数和保留时间将收集的65个样品分成3类,其中大部分样品属于具有铜酞菁颜料主要色谱峰的第二大类。色谱峰的保留时间和峰面积比值的分析结果表明所建立的分析方法重现性好且稳定。在此基础上,对蓝色中性笔墨迹随书写时间的变化规律进行了初步研究,得出了老化曲线。     

Improving mechanical properties and chemical resistance of ink‐jet printer color filter by using diblock polymeric dispersants

The diblock copolymers of polystyrene and poly(tert‐butyl acrylate) (PSt‐b‐PtBA) with various molecular weights and hydrophobic/hydrophilic (styrene/acrylic acid) chain length were prepared by atom transfer radical polymerization (ATRP). Selective hydrolysis of the diblock copolymers (PSt‐b‐PtBA) resulted in amphiphilic block copolymers of polystyrene and poly(acrylic acid) (PSt‐b‐PAA). The amphiphilic block copolymers of PSt‐b‐PAA with average molecular weight (M_n) <7500 were proved to be critical in dispersing the pigments of UV curable ink‐jet inks for manufacturing the color filter. Incorporating DB2 diblock copolymer dispersants with styrene/acrylic acid ratio at 1.5 allowed more UV curable compositions in the red and blue inks without deteriorating pigment dispersing stability and jetting properties of the ink‐jet inks. The ink drops can be precisely ejected into the tiny color area. Better properties of the cured red stripe such as nanoindentation hardness and chemical resistance were found. The competing absorption of UV light by the blue pigment hindered the through cure of monomers near the interface between glass substrate and the blue stripe. This leads to lower hardness and poor chemical resistance of the UV cured blue stripe. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 3337–3353, 2005     

Nondestructive classification and identification of ballpoint pen inks by Raman spectroscopy for forensic document examinations

As a non-destructive analytical method, Raman spectroscopy often provides insufficient information to identify or differentiate the ink used for the preparation of a questioned document. In this study, blue and black ballpoint pen inks deposited on paper substrate were examined in situ by conventional Raman spectroscopy. Inks were successfully classified based on the total number of prominent bands in Raman spectra. It was found that more than 90% of the samples of the same type and color could be differentiated visually using only Raman spectra, i.e. 94 and 95% for blue and black inks, respectively. As a result of this study, a flow chart has been constructed for blue and black ballpoint pen inks allowing their systematic identification. Raman spectroscopy proved to be a fast and precise technique for forensic ink analysis.     

Removal of solvent-based ink from printed surface of HDPE bottles by alkyltrimethylammonium bromides: effects of surfactant concentration and alkyl chain length

Three alkyltrimethylammonium bromides (i.e., dodecyl-, tetradecyl-, and hexadecyltrimethylammonium bromide or DTAB, TTAB, and CTAB, respectively) were used to remove a blue solvent-based ink from a printed surface of high-density polyethylene bottles. Either an increase in the alkyl chain length or the surfactant concentration was found to increase the deinking efficiency. Complete deinking was achieved at concentrations about 3, 8, and 24 times of the critical micelle concentration (CMC) of CTAB, TTAB, and DTAB, respectively. For CTAB, ink removal started at a concentration close to or less than its CMC and increased appreciably at concentrations greater than its CMC, while for TTAB and DTAB, significant deinking was only achieved at concentrations much greater than their CMCs. Corresponding to the deinking efficiency of CTAB in the CMC region, the zeta potential of ink particles was found to increase with increasing alkyl chain length and concentration of the surfactants, which later leveled off at some higher concentrations. Wettability of the surfactants on an ink surface increased with increasing alkyl chain length and concentration of the surfactants. Lastly, solubilization of ink binder in the surfactant micelles was found to increase with increasing alkyl chain length and surfactant concentration. We conclude that adsorption of surfactant on the ink pigment is crucial to deinking due to modification of wettability, zeta potential, pigment/water interfacial tension, and dispersion stability. Solubilization of binder (epoxy) into micelles is necessary for good deinking because the dissolution of the binder is required before the pigment particles can be released from the polymer surface.     

马铃薯淀粉磷酸酯的物理化学特性

通过与玉米淀粉和马铃薯淀粉相比较,研究了马铃薯淀粉磷酸酯（PEPS）的理化特性,包括粘度的测定,热糊与冷糊的稳定性,不同pH值及电解质（NaCl)和非电解质（蔗糖）存在下的粘度曲线,凝胶强度及冻融稳定性,结果表明,马铃薯淀粉磷酸酯比玉米淀粉和马铃薯淀粉具有更优良的热糊与冷糊的稳定性,电解质(NaCl）和非电解质（蔗糖）的存在,对其热糊与冷糊的稳定性基本元影响,凝胶强度高,冻融稳定性好,尤其是耐酸性能强。     

Study on dispersion stability of copper phthalocyanine (CuPc) blue pigment in water improved by plasma treatments

Oxygen plasma was used to modify the copper phthalocyanine (CuPc) blue pigment. It is effective in improving stability of CuPc pigment in aqueous dispersion. Treatment conditions, e.g., treating time, gas pressure and discharge power, had great influence on the surface properties of pigments. X-ray photoelectron spectroscopy (XPS) indicated that the CuPc blue pigment surface was partially oxidized and polar groups including COH, COOH, C?O were incorporated. Dispersion stability of pigment in water was greatly increased. The plasma modified CuPc blue pigment was applied to on cotton fabric. Rubbing fastness and K/S value of the pigment prints were enhanced.     

螺旋藻蛋白色素的稳定性研究

本文考察了螺旋藻蛋白色素（SP）的干粉和溶液的稳定性。SP干粉在暗处和室内自然光下较稳定，直射光下稍差。SP溶液在PH6～7时色泽呈蓝色，Cu2+对其稳定性有破坏作用，EDTA和柠檬酸可增强SP溶液稳定性，而明胶对其无影响，山梨酸对SP溶液色泽有良好的保护作用，SP在10％乙醇溶液或50％甘油溶液中较稳定。     

紫外光固化油墨中的颜料分散

１引言九十年代以来,印刷油墨行业受到来自环境保护的压力越来越大。辐射固化油墨（其中ＵＶ固化占９０％）的研究和应用出现了日新月异、迅猛发展的良好势头。紫外光固化油墨较之传统油墨固化迅速、能耗低,可用于对热敏感的基材,固化产品性能优越,最重要的是无溶剂挥发造成的环境污染,是面向二十一世纪的绿色工业技术！”。紫外光固化油墨中的颜料分散与传统油墨类似,但油墨本身成本高低与组分及其配比关系极大,其中如何选择颜料、分散助剂,如何调整分散工艺是控制成本的关键技术。１．１影响颜料分散的因素油墨中颜料分散的情况,…     

花菁啶-3-葡萄糖甙的稳定性

蓝靛果可食用,是忍冬属植物,主要分布在长白山和大、小兴安岭地区。全果中花色甙(花菁啶-3-葡萄糖甙)的含量比较高,是理想的制取花色甙类天然色素的原料。其结构式为：