Infrared Blocking Materials: A Science-Based Approach to Transparent Heat Insulation

紅外線阻隔材料：透明隔熱應用中的科學化材料方案

Why Infrared Blocking Matters

In modern buildings, vehicles, and functional films, one of the key challenges is how to reduce heat from sunlight without sacrificing transparency. Sunlight contains ultraviolet, visible, and near-infrared radiation. Recent studies on energy-saving coatings point out that near-infrared radiation accounts for a significant portion of solar heat, and ordinary glass lacks spectral selectivity because it allows both visible light and near-infrared light to pass through. Therefore, transparent heat-insulation materials need to selectively block near-infrared radiation while maintaining high visible light transmittance.

This is exactly the value proposition of infrared blocking additives: they are designed not simply to “darken” a material, but to help separate light from heat. A well-designed infrared blocking system allows visible light to pass through for brightness and clarity, while reducing near-infrared heat transfer through absorption or reflection.

Scientific Principle: Selective Near-Infrared Shielding

Among various transparent heat-insulation materials, cesium tungsten bronze materials, commonly expressed as CsxWO3 or Cs0.33WO3, have attracted strong research interest because they combine visible-light transparency with near-infrared shielding. Literature reports that the near-infrared absorption of CsxWO3 is closely related to localized surface plasmon resonance and small polaron absorption mechanisms, which enable strong NIR shielding while retaining visible transparency.

A 2018 study in Journal of Applied Physics reported that Cs0.33WO3 shows strong near-infrared reflectance/absorption and high visible-light transmission, making it suitable for transparent solar radiation shielding filters and nanoparticle-dispersed coatings. Later studies further confirmed the practical potential of Cs0.33WO3/polymer composite coatings: one study reported that only 0.9 mg cm−2 Cs0.33WO3 could shield more than 70% of near-infrared radiation while maintaining visible-light transmittance above 75%.

How This Connects with AntibariMax® Infrared Barrier Series

Langyi’s AntibariMax® Infrared Barrier Series is positioned as an infrared blocking functional material that can selectively block infrared rays in sunlight by reflecting or absorbing infrared radiation, while maintaining excellent visible light transmittance. This product logic is highly consistent with the current direction of scientific research: transparent thermal insulation is not only about heat reduction, but also about balancing infrared shielding, visible transparency, dispersion, processing compatibility, and long-term stability.

The AntibariMax® series includes multiple product forms for different processing routes. According to Langyi’s product information, AntibariMax® LNT is supplied as a blue-black powder with high effective content; AntibariMax® JLNT-TD and JLNT-EA are blue-black slurry products with D50 ≤ 50 nm and customizable active content; AntibariMax® MLNT is a masterbatch form compatible with PET, TPU, PC, PMMA and other customizable substrates. The product series highlights uniform particle size, easy dispersion, good storage stability, good transparency, and high infrared barrier performance.

From an application perspective, this multi-form product design is important. Powder products are suitable for customers with their own dispersion and formulation capability; slurry products are convenient for coating, film, adhesive, and ink-like systems; masterbatch products are more suitable for extrusion, injection molding, film production, and polymer modification processes.

Latest Literature Trends

Recent research suggests that particle size and dispersion stability are critical to the optical performance of Cs0.33WO3-based transparent heat-insulation materials. A 2024 study on Cs0.33WO3 window films reported that particle size affects both near-infrared blocking and visible-light transmittance. The study found that CWO particles with D90 between 100 nm and 130 nm showed relatively high stability in NIR blocking and visible-light transmission, while smaller particles may improve transparency but require careful stability control.

Another important research direction is performance enhancement through doping and composite structures. A 2023 study showed that Ti-doped CsxWO3 nanopowders improved both visible transmittance and near-infrared shielding efficiency, indicating that suitable element doping can improve transparent thermal-insulation performance. In 2025, researchers developed a Cs0.33WO3@TiO2 core-shell structure, reporting improved visible transmittance, enhanced near-infrared absorption, better environmental protection for Cs0.33WO3, and multifunctional potential for self-cleaning energy-saving coatings.

Composite design is also becoming more important. A 2024 study on Cs0.33WO3@ATO materials aimed to combine the advantages of Cs0.33WO3 and antimony-doped tin oxide: Cs0.33WO3 is strong in shorter-wave NIR shielding, while ATO can contribute to longer-wave infrared shielding, making the composite attractive for broader solar thermal control. A 2025 study further explored Cs0.33WO3-g-C3N4-rGO nanocomposites for near-infrared shielding and photocatalytic applications, reporting visible-light transmittance above 70% in composite films and improved thermal-insulation and pollutant-degradation performance.

Product Value for Functional Films, Coatings, and Plastics

For downstream customers, the value of infrared blocking materials is not limited to laboratory optical data. In real production, customers care about dispersion, compatibility, processability, storage stability, transparency, haze, and whether the additive can be integrated into existing coating or polymer systems. This is why product form matters.

AntibariMax® provides powder, slurry, and masterbatch options, helping customers select a more suitable form according to the application scenario. For transparent coatings and optical films, slurry products can reduce the difficulty of dispersion and formulation. For polymer films and plastic sheets, masterbatch products can simplify production and improve processing convenience. For customers with advanced formulation capabilities, powder products provide greater flexibility in concentration adjustment and system design.

Conclusion

Infrared blocking materials are becoming an important part of transparent thermal management technology. Scientific literature shows that CsxWO3 / Cs0.33WO3-type materials are promising because they can combine near-infrared shielding with visible-light transparency. At the same time, recent research highlights the importance of particle size control, dispersion stability, doping modification, core-shell structures, and multifunctional composite design.

Langyi’s AntibariMax® Infrared Barrier Series responds to these market and technical needs by offering different product forms, including powder, slurry, and masterbatch. With customizable formulation possibilities and application-oriented product design, AntibariMax® can support transparent heat-insulation films, architectural energy-saving coatings, automotive films, optical films, and functional polymer materials.

For product selection, formulation support, or sample evaluation, please contact our technical team.

為什麼紅外線阻隔材料越來越重要？

在建築玻璃、汽車膜、功能薄膜以及透明塗層應用中，一個核心問題是：如何降低太陽光帶來的熱量，同時保留良好的透明度與採光效果。太陽光主要包含紫外線、可見光與近紅外線，其中近紅外線是造成熱量累積的重要來源。近年關於節能塗層的研究指出，普通玻璃缺乏光譜選擇性，往往會同時透過可見光與近紅外線，因此難以在保持透明的同時有效隔熱。

紅外線阻隔材料的價值正在於此：它不是單純把材料“變暗”，而是通過光譜選擇性，盡量讓可見光透過，同時降低近紅外線帶來的熱量傳遞。換句話說，理想的透明隔熱材料要做到“透光不透熱”。

科學原理：選擇性近紅外線屏蔽

在眾多透明隔熱材料中，銫鎢青銅類材料，通常表示為 CsxWO3 或 Cs0.33WO3，近年受到廣泛關注。相關文獻指出，CsxWO3 的近紅外吸收能力與局域表面等離子體共振以及小極化子吸收機制有關，這使其能夠在保持可見光透明性的同時，對近紅外線產生較強阻隔作用。

《Journal of Applied Physics》於 2018 年發表的研究指出，Cs0.33WO3 具有優異的近紅外反射/吸收能力以及較高的可見光透過率，適合用於透明太陽輻射屏蔽濾光材料與納米粒子分散型塗層。此後也有研究報導，Cs0.33WO3/聚合物複合塗層在較低添加量下即可實現明顯近紅外屏蔽效果，例如 0.9 mg cm−2 的 Cs0.33WO3 可阻隔超過 70% 的近紅外線，同時保持 75% 以上的可見光透過率。

與朗億 AntibariMax® 紅外阻隔系列的關聯

朗億 AntibariMax® Infrared Barrier Series 定位為一類紅外線阻隔功能材料，可通過反射或吸收紅外線，選擇性阻隔太陽光中的紅外線，同時保持優異的可見光透過率。這一產品邏輯與當前透明隔熱材料的研究方向高度一致：真正有應用價值的紅外線阻隔材料，不僅要“隔熱”，還要兼顧透明性、分散性、加工相容性與長期穩定性。

根據朗億產品頁面資訊，AntibariMax® 系列包含多種形態：AntibariMax® LNT 為藍黑色粉體，有效含量高；AntibariMax® JLNT-TD 與 JLNT-EA 為藍黑色漿料，D50 ≤ 50 nm，有效含量可定制；AntibariMax® MLNT 為母粒形態，可適配 PET、TPU、PC、PMMA 等基材，亦可根據需求定制。該系列產品強調粒徑均一、易分散、儲存穩定性好、透明性好以及紅外阻隔率高等特點。

從下游應用角度看，多形態產品設計非常重要。粉體適合具有自主分散與配方開發能力的客戶；漿料更適合塗層、薄膜、膠黏劑、油墨等體系；母粒則更適合擠出、注塑、流延膜、片材以及聚合物改性等加工方式。

近年文獻趨勢

最新研究表明，粒徑控制與分散穩定性是影響 Cs0.33WO3 類透明隔熱材料光學性能的關鍵因素。2024 年一項關於 Cs0.33WO3 建築窗膜的研究指出，粒徑會同時影響近紅外阻隔能力與可見光透過率。該研究發現，D90 在 100–130 nm 範圍內的 CWO 粒子在近紅外阻隔與可見光透過方面具有較好的穩定性；而更小粒徑雖可能提升透明度，但需要更加重視穩定性控制。

另一個重要方向是通過摻雜與複合結構提升性能。2023 年有研究指出，Ti 摻雜 CsxWO3 納米粉體可同時提高可見光透過率與近紅外屏蔽效率，說明適當元素摻雜有助於提升透明隔熱性能。2025 年一項研究進一步開發了 Cs0.33WO3@TiO2 核殼結構，報導其可改善可見光透過、增強近紅外吸收，並通過 TiO2 外層對 Cs0.33WO3 起到一定環境保護作用，同時具備自清潔節能塗層的應用潛力。

複合化設計也正在成為透明隔熱材料的重要研發方向。2024 年關於 Cs0.33WO3@ATO 複合材料的研究，希望結合 Cs0.33WO3 與銻摻雜氧化錫的互補優勢：Cs0.33WO3 對短波近紅外線具有較好阻隔效果，而 ATO 可補充長波近紅外區域的屏蔽能力，因此該類複合材料在更寬光譜範圍的太陽熱控制方面具有潛力。2025 年另有研究探索 Cs0.33WO3-g-C3N4-rGO 納米複合材料，用於近紅外屏蔽與光催化應用，並報導複合薄膜可見光透過率高於 70%，同時提升隔熱與污染物降解能力。

對功能薄膜、塗層與塑膠應用的價值

對下游客戶而言，紅外線阻隔材料的價值不僅體現在實驗室光學數據上，更體現在實際加工中的分散性、相容性、加工便利性、儲存穩定性、透明度、霧度以及是否能順利導入現有生產體系。因此，產品形態的選擇非常關鍵。

AntibariMax® 提供粉體、漿料與母粒等不同形態，方便客戶根據應用場景選擇更合適的產品。對透明塗層與光學薄膜而言，漿料形態可以降低分散與配方開發難度；對聚合物薄膜與塑膠片材而言，母粒形態能簡化加工流程，提高使用便利性；對具備配方能力的客戶而言，粉體產品則提供更高的添加量調整空間與配方設計自由度。

結論

紅外線阻隔材料正在成為透明熱管理技術的重要組成部分。科學文獻表明，CsxWO3 / Cs0.33WO3 類材料具備將近紅外屏蔽與可見光透明性相結合的潛力。同時，近年研究也強調了粒徑控制、分散穩定性、摻雜改性、核殼結構與多功能複合設計的重要性。

朗億 AntibariMax® Infrared Barrier Series 正是圍繞這些應用需求進行產品化設計，提供粉體、漿料與母粒等多種形態，能夠支持透明隔熱膜、建築節能塗層、汽車隔熱膜、光學薄膜以及功能性聚合物材料等應用。

如需產品選型、配方支持或樣品測試，歡迎聯繫我們的技術團隊。

References / 參考文獻

1. Shanghai Langyi Functional Materials Co., Ltd. AntibariMax® Infrared Barrier Series product page.
2. Cai, Q. et al. “In-situ growth of Cs0.33WO3@ATO composite material with enhanced NIR shielding rate for energy-saving coating,” Ceramics International, 2024.
3. Li, N. et al. “A Study of the Optical Properties and Stability of Cs0.33WO3 with Different Particle Sizes for Energy-Efficient Window Films in Building Glazing,” Buildings, 2024.
4. Wen, L. et al. “Fabrication of Cs0.33WO3@TiO2 heterostructure with enhanced light modulation for energy saving coating,” Ceramics International, 2025.
5. Puspasari, V. et al. “Fabrication of Cs0.33WO3-g-C3N4-rGO nanocomposite for near-infrared shielding and photocatalysis applications,” Applied Surface Science, 2025.
6. Huang, L. et al. “Preparation of Monodispersed Cs0.33WO3 Nanocrystals by Mist Chemical Vapor Deposition for Near-Infrared Shielding Application,” Nanomaterials, 2020.
7. Li, Q. et al. “Tungsten bronze CsxWO3 nanopowders doped by Ti to enhance transparent thermal insulation ability for energy saving,” Journal of Alloys and Compounds, 2023.
8. Xu, X. et al. “Cs0.33WO3 as a high-performance transparent solar radiation shielding material for windows,” Journal of Applied Physics, 2018.