Recently, as various displays and devices such as wearable and embaddable have been developed, antifogging coating is also required to have high mechanical durability as well as antifogging performance. Herein, a nanoscale stretchable antifogging polymer film equipped with superhydrophilicity was newly designed and synthesized in one-step man-ner using a vapor phase method, initiated chemical vapor deposition (iCVD). The stretcha-ble antifogging polymer film was generated by the copolymerization of 2-hydroxyethyl acrylate (HEA), a soft, hydrophilic monomer, together with a small fraction of a robust crosslinker moiety, 1,3,5-trivinyl-1,3,5-trimethylcyclotrisiloxane (V3D3), that can stabilize the antifogging surface in aqueous environment. The addition of the V3D3 crosslinker also substantially improved the adhesion of the polymer coating on the substrate materials. The composition of the copolymer film was adjusted precisely by controlling the flow rates of the input monomers in the vapor-phase deposition process. This stretchable polymer film showed outstanding antifogging performance almost 100% transmittance over a long peri-od of time, and it was confirmed the durability that was maintained even through repeated cycle test. Besides, the stretchable antifogging polymer film with the optimized composi-tion showed an elastic limit higher than 300% while maintaining the antifogging perfor-mance. This thin film also has self-cleaning performance derived from superhydrophilicity, and can be deposited anywhere through a vapor phase process, and even deposited on a patterned substrate, showing excellent antifogging performance. We believe the stretchable antifogging polymer film developed in this study is a promising candidate material for var-ious stretchable device applications.
최근 웨어러블, 생체 내장형 등 다양한 디스플레이 및 장치가 발전함에 따라 연신이 가능하며 김서림 조건에서도 높은 광학 투명도를 유지하는 기능성 코팅에 대한 수요가 증가하였다. 본 연구에서는, 초친수성을 갖춘 나노크기의 신축성 김서림 방지 고분자 필름을 개시제를 이용한 화학 기상 증착법(iCVD)을 이용하여 단일 공정 방식으로 새롭게 설계 및 합성하였다. 연신 가능한 김서림 방지 고분자 필름은 부드러운 친수성 모노머인 2-hydroxyethyl acrylate (HEA)와 견고한 가교제인 1,3,5-trivinyl-1,3,5-trimethylcyclotrisiloxane(V3D3)의 공중합으로 제작되었다. 과도한 팽윤으로 기계적 내구성이 떨어지는 기존의 김서림 방지 필름과는 달리, iCVD 기반 김서림 방지 고분자 필름은 가교 정도를 조절하여 우수한 김서림 방지 성능을 가짐과 동시에 300%까지의 안정적인 연신이 가능하다. 더욱이, 반복해서 뜨거운 증기에 노출시켰을 때도 김서림 방지 성능을 유지하는 것으로 보아 훌륭한 내구성을 가짐을 확인할 수 있었다.
