Ryo Tabata, Moeka Oosumi, Ryosuke Matsubara, A. Kubono
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引用次数: 0
Abstract
Conformal coatings are crucial for various applications. In this study, we investigate polyurea coatings on complex-shape polytetrafluoroethylene (PTFE) membranes using vapor deposition polymerization. The diffusion mechanism involves monomer adsorption and desorption on PTFE fibers, enhanced by an increased substrate temperature, facilitating monomer diffusion. A system pressure of 100 Pa promoted monomer collisions, forming oligomers with lower desorption rates, aiding polymer thin-film formation. The combination of high substrate temperature for diffusion and gas-phase oligomer formation resulted in uniform polyurea coatings across the PTFE membrane. A non-exhaustion method provided an extensive monomer diffusion, achieving a thorough polyurea deposition throughout the membrane structure.
保形涂层对于各种应用都至关重要。在本研究中，我们利用气相沉积聚合法研究了复杂形状聚四氟乙烯（PTFE）膜上的聚脲涂层。扩散机制包括单体在聚四氟乙烯纤维上的吸附和解吸，基底温度的升高促进了单体的扩散。100 Pa 的系统压力促进了单体碰撞，形成了解吸率较低的低聚物，有助于聚合物薄膜的形成。扩散基底温度高和气相低聚物形成相结合，在聚四氟乙烯膜上形成了均匀的聚脲涂层。非排气法提供了广泛的单体扩散，实现了整个膜结构中聚脲的彻底沉积。
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