当前位置: X-MOL 学术Environ. Sci.: Nano › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The efficacy and environmental implications of engineered TiO2 nanoparticles in a commercial floor coating
Environmental Science: Nano ( IF 7.3 ) Pub Date : 2017-08-30 00:00:00 , DOI: 10.1039/c7en00649g
Yuqiang Bi 1, 2, 3, 4 , Tatiana Zaikova 4, 5, 6, 7 , Jared Schoepf 1, 2, 3, 4 , Pierre Herckes 2, 3, 4, 8 , James E. Hutchison 4, 5, 6, 7, 9 , Paul Westerhoff 1, 2, 3, 4
Affiliation  

Engineered nanomaterials (ENM) have diverse applications in consumer products, but few studies weigh the improved product performance resulting from the inclusion of an ENM against the unintended consequences of released ENM. We developed and applied a framework to test a commercial floor coating that contains TiO2 nanoparticles in a silicate/siliconate matrix for both efficacy and exposure risk. Extracted TiO2 nanoparticles from the product were first characterized for particle size, morphology, mass concentration, and surface chemical composition prior to floor tile application. Porcelain tiles were coated with three TiO2 concentrations to understand the effect of TiO2 content on coating performance with respect to antimicrobial properties, abrasion resistance, and hydrophobicity. Coating porcelain tiles with the commercial product did not significantly enhance antimicrobial activity or scratch resistance compared to controls without TiO2 nanoparticles. Particles released during accelerated abrasion were collected and analyzed by scanning electron microscopy (SEM) to inform exposure studies. During the abrasion test that simulated product use phase, TiO2 nanoparticles clusters were effectively removed from tile surfaces and embedded in a micron-sized silicate matrix. Reactive oxygen species (ROS) generated in water by photocatalytic reactions using TiO2 from the coating were an order of magnitude lower than by a TiO2 nanoparticle standard. While the overall exposure risk to TiO2 nanoparticles released from floor coatings is low, we did not observe increased efficacy from adding TiO2 to the coating formulation. Product developers and policy makers may use the framework developed in this study to systematically assess the efficacy and product safety across a product's life cycle.

中文翻译:

工程TiO 2纳米颗粒在商业地板涂料中的功效和对环境的影响

工程纳米材料(ENM)在消费产品中具有多种应用,但是很少有研究权衡因加入ENM而导致的产品性能提高与已发布的ENM带来的意想不到的后果。我们开发并应用了一个框架来测试商用地板涂料,该涂料在硅酸盐/硅酸盐基体中包含TiO 2纳米颗粒,以提高功效和暴露风险。从产品中提取的TiO 2纳米颗粒首先要进行粒度,形态,质量浓度和表面化学成分的表征,然后再使用地砖。用三种浓度的TiO 2涂覆瓷砖以了解TiO 2的作用相对于抗菌性能,耐磨性和疏水性而言,涂层性能上的含量。与没有TiO 2纳米颗粒的对照相比,用市售产品涂覆的瓷砖没有显着增强抗菌活性或耐刮擦性。收集在加速磨损过程中释放的颗粒,并通过扫描电子显微镜(SEM)进行分析以告知暴露研究。在模拟产品使用阶段的磨损测试过程中,有效地从瓷砖表面去除了TiO 2纳米颗粒簇,并将其嵌入微米级的硅酸盐基质中。使用涂料中的TiO 2通过光催化反应在水中产生的活性氧(ROS)比TiO2低一个数量级2纳米粒子标准。尽管从地板涂料中释放出的TiO 2纳米颗粒的总体暴露风险较低,但我们并未观察到将TiO 2添加到涂料配方中而提高的功效。产品开发人员和政策制定者可以使用本研究中开发的框架来系统地评估整个产品生命周期中的功效和产品安全性。
更新日期:2017-10-13
down
wechat
bug