Monne Mahmuda Akter, Howlader Chandan Qumar, Mishra Bhagyashree, Chen Maggie Yihong
Materials Science, Engineering, and Commercialization Program, Texas State University, San Marcos, TX 78666, USA.
Ingram School of Engineering, Texas State University, San Marcos, TX 78666, USA.
Micromachines (Basel). 2021 Feb 22;12(2):220. doi: 10.3390/mi12020220.
Polyvinyl Alcohol (PVA) is a promising polymer due to its high solubility with water, availability in low molecular weight, having short polymer chain, and cost-effectiveness in processing. Printed technology is gaining popularity to utilize processible solution materials at low/room temperature. This work demonstrates the synthesis of PVA solution for 2.5% /, 4.5% /, 6.5% /, 8.5% / and 10.5% / aqueous solution was formulated. Then the properties of the ink, such as viscosity, contact angle, surface tension, and printability by inkjet and aerosol jet printing, were investigated. The wettability of the ink was investigated on flexible (Kapton) and non-flexible (Silicon) substrates. Both were identified as suitable substrates for all concentrations of PVA. Additionally, we have shown aerosol jet printing (AJP) and inkjet printing (IJP) can produce multi-layer PVA structures. Finally, we have demonstrated the use of PVA as sacrificial material for micro-electro-mechanical-system (MEMS) device fabrication. The dielectric constant of printed PVA is 168 at 100 kHz, which shows an excellent candidate material for printed or traditional transistor fabrication.
聚乙烯醇（PVA）是一种很有前景的聚合物，因为它在水中的溶解度高、有低分子量的产品、聚合物链短且加工成本效益高。印刷技术越来越受欢迎，可用于在低温/室温下使用可加工的溶液材料。这项工作展示了2.5%、4.5%、6.5%、8.5%和10.5%的PVA水溶液的合成。然后研究了油墨的性能，如粘度、接触角、表面张力以及通过喷墨和气动喷墨印刷的可印刷性。在柔性（聚酰亚胺）和非柔性（硅）基板上研究了油墨的润湿性。两者都被确定为适合所有浓度PVA的基板。此外，我们已经表明气动喷墨印刷（AJP）和喷墨印刷（IJP）可以生产多层PVA结构。最后，我们展示了PVA作为微机电系统（MEMS）器件制造的牺牲材料的用途。印刷PVA在100 kHz时的介电常数为168，这表明它是印刷或传统晶体管制造的极佳候选材料。
