无颗粒型银导电墨水的制备及其印刷成膜研究

以柠檬酸银为导电金属前驱体化合物,仲丁胺为络合剂,并添加乙醇调节粘度和表面张力等物性参数,制备了无颗粒型银导电墨水。该导电墨水可以采用凹版印刷方式印刷在PET片基上,并且在较低的热处理温度下即可获得导电性较好的银导电膜。利用X射线光电子能谱仪、同步热分析仪、红外光谱仪、X射线衍射仪、扫描电子显微镜和四探针测试仪对柠檬酸银、导电墨水以及银导电膜进行表征。结果表明导电墨水在132 ℃时残留质量即达到恒重,远低于柠檬酸银的210 ℃;经150 ℃热处理之后,银导电膜由均匀致密、纯度高的纳米银颗粒组成;经150 ℃热处理50 min后得到的银导电膜的方块电阻值为1.83 Ω·□-1。     

印刷品原色油墨光谱预测中减色线性经验空间的建立

在半色调印刷品原色油墨光谱预测技术中,在原光谱反射率空间进行主成分分析得到的代表性基向量数目会大于实际所使用的原色油墨数目,即光谱反射率空间并不适用光谱预测,且主成分分析得到的基向量会出现负值,没有物理意义。针对上述问题,建立了一个减色线性经验空间模型及其空间转换模型,并探究了影响经验空间线性程度n值的因素,通过实验及优化算法创新性找到确定最佳n值的方法,并在该减色线性经验空间进行半色调原稿原色油墨的预测实验。实验结果表明,在不同n值下,选取原始光谱反射率R_m和重构光谱反射率R_recon的f范数平方值的最小值对应的n值做为建立线性经验空间确定最佳n值的方法是有效的;为了将纸张和油墨类型对空间转换因数n的影响程度减到最小,最终确定n值为3.5;在减色线性经验空间进行印刷品原色油墨数目预测,得到的代表性基向量数目恰好等于实际印刷使用的原色油墨数目4,进行原色油墨光谱预测,预测的4色油墨除K色外,其他CMY色与实际原色油墨光谱相比拟合度GFC均大于99.9%。即所提出的优化n值的新方法建立的减色线性经验空间是一个可作为半色调印刷品原色油墨数目预测和光谱预测的有效线性空间。     

鱿鱼墨多糖的硫酸酯化及抗凝血活性

本文采用三氧化硫吡啶复合物二甲亚砜法首次对北太平洋鱿鱼墨多糖SIP进行硫酸酯化。对硫酸酯化后多糖样品的基本化学组成进行测定,分析了糖组成,硫酸基含量和分子量。并结合红外光谱和一维核磁分析其结构,结果表明硫酸酯化主要发生在GalNAc的4,6位上。进一步的凝血活性分析表明有较好的延长APTT和PT时间效果。对凝血因子的抑制实验则表明,硫酸化后的鱿鱼墨多糖TBA-1对FIIa和FXa 均有显著的抑制作用。     

自制变色滑动变阻器

自制了变色滑动变阻器，即在滑动变阻器上涂上变温油墨，当滑动变阻器有电流流过时，利用电流的热效应，油墨颜色将发生改变，由此形象直观地显示变阻器上电流流过的情况。     

将功能纳米材料发展前沿融入实验教学——隐形荧光墨水的制备

为了让学生了解纳米材料的性质和用途，开发了一个研究型综合性实验——隐形荧光墨水的制备。通过微波反应快速地制备了一种新型的氮掺杂碳量子点，克服了碳量子点制备繁琐的难题，使碳点的制备能够在实验教学中得以实现，利用透射电镜、X射线衍射、红外光谱以及X射线能谱对碳点的结构和形貌进行表征，利用紫外-可见-近红外光谱仪和荧光光谱仪研究碳点的稳定性和光化学性能；并将该碳点制作成隐形荧光墨水，增加了实验的趣味性和实用性。学生实验证明该综合性实验适用于本科生实验教学。     

Effects of polymeric dispersants and surfactants on the dispersing stability and high‐speed‐jetting properties of aqueous‐pigment‐based ink‐jet inks

Good jetting performance and pigment‐dispersing stability are necessary for pigment‐based ink‐jet inks. This study investigates how the chemical structures of the polymeric dispersants affect the pigment‐dispersing stability and jetting performance of ink‐jet inks. A series of polymeric dispersants containing styrene (hydrophobic unit) and acrylic acid (hydrophilic unit) with different ratios have been synthesized and used to disperse different pigments. Because 3000–12,000 ink drops can be expelled from the nozzle of a thermal bubble‐type ink‐jet printer within 1 s, the jetting behavior is related to the rheology variation of a dilute solution under a high shear. An in situ drop formation system has been used to study the high‐shear‐rate rheology (dynamic surface tension and dynamic viscosity) of a solution with a viscosity lower than 3 cps, which no commercial rheometer can measure. Excellent ink‐jet inks can only be produced by the combination of pigments, dispersants, and surfactants with appropriate hydrophilicity. Moreover, the correlation of the pigment surface properties, the chemical structures of the polymeric dispersants, and ink formulation is discussed. The effects of the surfactants and firing conditions on the jetting behavior of the ink‐jet ink are also examined. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 1909–1920, 2003     

胶束电动毛细管色谱法鉴别蓝色圆珠笔油墨

建立了用胶束电动毛细管色谱法（MECC）对纸上微量蓝色圆珠笔油墨进行分析鉴别的方法。研究了检测波长、电压、温度及电泳缓冲液中各组分浓度等因素对圆珠笔油墨分离的影响。当电压为25kV、柱温为25℃，检测波长为200nm时，以50mmol/L SDS-50mmol/L硼砂溶液（外加体积分数为45％的乙腈）为缓冲液，20种微量圆珠笔油墨样品样到了良好的鉴别。     

Historical iron gall ink containing documents — Properties affecting their condition

Iron gall ink, also referred to as iron gallotannate ink, is one of the most important inks in the history of western civilisation, and was in widespread use from the middle ages until the 20th century. Unfortunately, iron ions and acids present in these inks induce enhanced degradation of paper, thus severely damaging numerous historical artefacts. Yet, when examining documents, it is frequently observed that not all materials containing iron gall ink are suffering from ink corrosion. While some are completely destroyed, others may be in excellent condition even centuries after their creation. In order to establish the main properties of materials, common to severely degraded documents, the effects of the type and quantity of metal ions in the ink, as determined by in-air PIXE method, pH of the ink on paper, grammage of paper, its absorptivity and the width of ink lines were evaluated against the extent of corrosion. Using multiple linear regression analysis, a correlation has been obtained between the width of the applied ink lines, pH, grammage of paper and the extent of ink corrosion. Based on these factors, which can be acquired non-destructively from most historical documents, it is therefore possible to predict the stability of historical iron gall ink containing paper.     

基于原位体积加成制备导电线路的研究

本文提出一种制备导电电路的方法。以纳米铜为导电填料，以光固化树脂为连接剂，制备含铜光固化油墨，利用丝网印刷方法获得含有纳米铜的图案，利用铜与银盐间的置换反应，将铜纳米粒子图案通过原位体积加成转化为导电银图案。研究结果表明，铜图案不具有导电性，而置换反应生成的银图案具有导电性，且导电能力受铜含量、银盐浓度、光照时间、浸泡反应时间等因素影响，本实验中获得的最高电导率为1.25×10⁵ S/m，导电线路具有良好的耐弯曲、耐疲劳性能，同时兼具优异的可修复性能，为导电线路的制备提供了常温下简单有效、成本低廉的实现方法，具有重要的参考价值。