具有可控粘合性的压敏胶粘剂，用于制造超薄软设备。,ACS Applied Materials & Interfaces

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具有可控粘合性的压敏胶粘剂，用于制造超薄软设备。
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-08-17 , DOI: 10.1021/acsami.0c11986
Yun Hee Ju ₁ , Hee-Jin Lee ₂ , Chul Jong Han ₂ , Cheul-Ro Lee ₁ , Youngmin Kim ₂ , Jong-Woong Kim ₁

Affiliation

随着近来对市场上可折叠智能手机的兴趣转向下一代柔性电子产品，超薄设备的开发受到了广泛的关注。在膜基器件的表面上形成的应变近似于膜厚度除以曲率半径的两倍。因此，超薄基板的使用是开发下一代可折叠设备的关键。但是，超薄膜的刚性极低。因此，不能容易地将其直接用作器件制造的基板。因此，这些膜通常在附着到诸如玻璃的刚性基板上的同时经历器件制造过程，并且在该过程完成之后从刚性基板上剥离。从而，用于将薄膜固定到临时基材上的粘合剂的初始粘附力应很强，并且在该过程完成后，必须降低粘附力以实现软剥离。在这项研究中，我们成功开发了一种新型的压敏胶粘剂（PSA），其粘合强度可以通过水处理而大大降低。因此，考虑到两亲性低聚物通过氢键结合到水而促进水吸收，因此将两亲性低聚物与丙烯酸类聚合物混合以制备水响应性PSA（wr-PSA）。wr-PSA的早期粘合强度达到382（±22）N / m，经过水浸试验后急剧下降至9（±2）N / m。使用wr-PSA，1。将浸有温水后，从玻璃上轻轻剥下涂有Ag纳米线的4μm厚的聚对苯二甲酸乙二醇酯薄膜。另外，当干燥由粘合剂吸收的水时，再次恢复了由于浸入水中而降低的粘合性。这意味着显影的粘合剂可以重复使用。

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Pressure-Sensitive Adhesive with Controllable Adhesion for Fabrication of Ultrathin Soft Devices.

As the interest in foldable smartphones recently launched onto the market shifts toward the next generation of flexible electronics, the development of ultrathin devices is gaining considerable attention. The strain formed on the surfaces of film-based devices approximates the film thickness divided by twice the radius of curvature; therefore, the use of an ultrathin substrate is the key for the development of next generation foldable devices. However, the stiffness of ultrathin films is extremely low; thus, it cannot be easily used directly as a substrate for device fabrication. Therefore, these films generally undergo device manufacturing processes while being attached to a rigid substrate such as glass and are peeled from the rigid substrate after the process is finished. Thus, the initial adhesion of the adhesive used to fix the film to the temporary substrate should be strong, and after the process is completed, the adhesion must be lessened to enable soft peeling. In this study, we succeeded in developing a novel pressure-sensitive adhesive (PSA) whose adhesive strength can be severely reduced by water treatment. Accordingly, considering that amphiphilic oligomers promote water absorption through hydrogen bonding to water, amphiphilic oligomers were mixed with an acrylic polymer to prepare the water-responsive PSA (wr-PSA). The adhesion strength of the wr-PSA in the early stage, which reached 382(±22) N/m, dramatically dropped to 9(±2) N/m after a water immersion test. Using the wr-PSA, a 1.4 μm-thick polyethylene terephthalate film coated with Ag nanowires was softly peeled off from the glass after being immersed in warm water. In addition, the adhesion reduced by the immersion in water was recovered again when the water absorbed by the adhesive was dried. This implies that the developed adhesive can be reusable.

更新日期：2020-09-10

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