STTR Phase I: Benign Thin Film Composite Particles for Protection from UVA/UVB - Rays

STTR 第一阶段：用于防护 UVA/UVB 射线的良性薄膜复合颗粒

• 批准号: 0420046
• 负责人: Karen Buechler
• 金额: $ 10万
• 依托单位: ALD NANOSOLUTIONS, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-07-01 至 2005-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0420046&HistoricalAwards=false
• 关键词: STTR; Phase; Benign; Thin; Film

This Small Business Technology Transfer (STTR) Phase I project will develop composite TiO2/ZnO (Titania /Zinc Oxide) particles capped with an Al2O3 nanolayer for benign protection from UVA/UVB - rays. Titania (TiO2) provides excellent protection against UVB - rays. Zinc oxide (ZnO) protects against UVA-rays very efficiently. The manufacture of composite particles via novel Atomic Layer Deposition (ALD) thin film technology allows for the synthesis of composite particles with dual effectiveness. In the first aspect of this work, ZnO will be deposited on nanosized TiO2 particles by ALD. In the second aspect of this work, nanolaminated films of TiO2 and ZnO will be prepared on the surface of submicron sized spherical silica (SiO2) particles. The large substrate SiO2 will provide a particle size for the "UVA/UVB sun blockers" that will be large enough to prevent pore blockage in human skin. In both instances, the composite particles will be capped with an alumina (Al2O3) nanolayer that will allow easy dispersion of these particles in non-aqueous formulations. The Al2O3 nanolayer will also prevent direct contact of the active TiO2/ZnO with the skin, thus protecting the skin from potential UV-hot activated reactions. The particles will be tested for UVA/UVB transmittance and Sun Protection Factors (SPF) will be calculated.The broader impacts of the technology could be the ability to produce ultrafine particles with designed electrical, magnetic, optical, mechanical, rheological properties, this technology could have significant commercial impact on microelectronics, defense, hard-metals, cosmetics, drug delivery, energetic materials, and polymer/ceramic nanocomposites.

这个小企业技术转让（STTR）第一阶段项目将开发复合TiO 2/ZnO（二氧化钛/氧化锌）颗粒，并覆盖一层Al 2 O 3纳米层，以实现对UVA/UVB射线的良性保护。二氧化钛（TiO 2）提供了极好的保护，防止紫外线。氧化锌（ZnO）非常有效地防止UVA射线。通过新颖的原子层沉积（ALD）薄膜技术制造复合颗粒允许合成具有双重效果的复合颗粒。在这项工作的第一个方面，ZnO将沉积在纳米TiO 2颗粒ALD。在这项工作的第二个方面，纳米层压薄膜的二氧化钛和氧化锌将制备在亚微米尺寸的球形二氧化硅（二氧化硅）颗粒的表面。大基质SiO2将为“UVA/UVB防晒剂”提供足够大的颗粒尺寸，以防止人体皮肤中的毛孔堵塞。在这两种情况下，复合颗粒将被氧化铝（Al 2 O3）纳米层覆盖，这将允许这些颗粒容易地分散在非水性制剂中。Al 2 O3纳米层还将防止活性TiO 2/ZnO与皮肤直接接触，从而保护皮肤免受潜在的UV热活化反应。该技术的更广泛的影响可能是生产具有设计的电，磁，光学，机械，流变性能的超细颗粒的能力，该技术可能对微电子，国防，硬金属，化妆品，药物输送，高能材料和聚合物/陶瓷纳米复合材料产生重大的商业影响。