Design of light-shielding glass using conductive cellulose nanofiber as heat-shielding interlayer film and their energy saving properties

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K15158
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 23020:Architectural environment and building equipment-related
• Research Institution: Kumamoto Industrial Research Institute
• Principal Investigator: Horikawa Maki 熊本県産業技術センター(ものづくり室、材料・地域資源室、食品加工室), その他部局等, 研究参事 (50588465)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: セルロース / PEDOT / 遮熱ガラス

Outline of Final Research Achievements

In this study, PEDOT / s-CNF was used as a NIR absorbing materials for the intermediate layer of heat shield glass. We polymerized the EDOT at various pH values. The electrical conductivity of the PEDOT significantly increased with decreasing pH during polymerization. Although all of the PEDOT/s-CNF thin films showed almost the same optical absorption in the UV-vis region (380-700 nm), their optical adsorption in the NIR region (700-2000 nm) increased with increasing electrical conductivity. PEDOT/s-CNF was used as intermediate layer of heat shield glass for the sealed box and was irradiated with NIR and IR light. The PEDOT/s-CNF thin film suppressed the temperature increase , demonstrating good thermal insulation.

Free Research Field

高分子材料

Academic Significance and Societal Importance of the Research Achievements

既存の遮熱ガラスはレアメタルが使われているが、本研究の遮熱ガラスはレアメタルを使わずに、天然由来のセルロースナノファイバーを原料として開発された。開発した遮熱材は高透明性かつ高熱線吸収性を併せもっており、これら特性を活かして遮熱ガラスを作製することができた。擬似太陽光による照射試験では、PEDOT/s-CNF遮熱ガラスによる温度抑制効果も確認され、今後はZEH住宅等への導入も期待されることから、社会的意義は大きい。