提高AEO9/醇/烷/水体系反相微乳液陶瓷墨水浓度的研究

鉴于陶瓷墨水在某些性能上存在不足,例如相对连续式喷墨打印机打印成型要求而言粘度较大、电导率偏低、固相含量不够高等问题,通过加入醇和Na₂CO₃等添加剂以及利用双连续结构分别对粘度、电导率等性能加以调整及提高陶瓷墨水的浓度。少量醇的加入(1％～2％)使陶瓷墨水体系粘度降低到11mPa·S左右,根据相图从双连续结构角度出发设计了陶瓷墨水的组成,考察了溶水量的变化,并借以提高陶瓷墨水固相含量,使其达到2.54％。由于双连续结构陶瓷墨水的理化性能(粘度、电导率等)仍不能完全满足要求,加入少量Na₂CO₃进行改性,改性后的陶瓷墨水粘度降至18mPa·s以下,电导率接近100mS/m,稳定性良好,墨水中陶瓷颗粒粒度在10nm以下,但透光率略有降低,显微结构观察表明具有明显的双连续结构特征。

Enhancement of Solid Content in AEO9/Alcohol/Alkane/Water Reverse Microemulsion Ceramic Inks

Some shortcomings, such as high viscosity, low conductivity and low solid content etc were found for the AEO₉/alcohol/alkane/water system reverse microemulsion ceramic inks prepared in the previous paper. Therefore, a small amount of alcohol and Na₂CO₃ were added to adjust and improve the physicochemical properties to meet the demands of continuous ink-jet printers. It was found that the addition of 1%～2% alcohol resulted in a reduction in viscosity to 11mPa·s. The composition of ceramic inks with the bicontinuous structure was designated according to the phase diagram. The change of water dissolving amounts was investigated with the objective of enhancing them. The solid load of 2.54% in the ink was realized experimentally. Unfortunately, the physicochemical properties were still not satisfactory. A small amount of Na₂CO₃ was added to improve them. It was revealed from the experiment that the viscosity was below 18mPa·s and the conductivity was 100mS/m after Na₂CO₃ modification. The stability of the modified ceramic inks was excellent and the particle size in the ink was lower than 10nm. The transparency of the ink was lowered a little compared with that of ordinary reverse microemulsion ceramic ink. The TEM observation demonstrated this ink had an obvious feature of bicontinuous structure.