两性离子磺基甜菜碱硅氧烷功能化的二氧化硅纳米颗粒，用作多功能防污涂料系统,ACS Applied Materials & Interfaces

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两性离子磺基甜菜碱硅氧烷功能化的二氧化硅纳米颗粒，用作多功能防污涂料系统
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-05-19 00:00:00 , DOI: 10.1021/acsami.7b04840
Brianna R. Knowles _{1,

2,

3} , Pawel Wagner ₁ , Shane Maclaughlin _{2,

3} , Michael J. Higgins _{1,

2} , Paul J. Molino _{1,

2}

Affiliation

发展能够有效抵抗生物结垢的表面的日益增长的需求导致了对具有潜在防污性能的纳米材料的广泛研究。但是，有效的防污涂料的制备受到反应性表面官能团的可用性以及我们在材料界面上仔细控制和组织化学物质的能力的限制。在这里，我们介绍两种通过二氧化硅-纳米颗粒悬浮液和预沉积的二氧化硅-纳米颗粒薄膜与两性离子磺基甜菜碱（SB）反应制备亲水性低污垢表面涂料的方法。纳米二氧化硅悬浮液在三个pH条件下用SB官能化，并通过简单的旋涂工艺沉积为薄膜，以生成亲水性防污涂层。此外，通过暴露于两性离子溶液对预沉积的二氧化硅纳米粒子的涂层进行表面功能化。具有耗散监测功能的石英晶体微重力法被用作高通量技术，用于监测和优化对二氧化硅纳米粒子表面的反应。纳米颗粒薄膜的功能化是快速的，并且可以在很宽的pH范围内和低两性离子浓度下实现。所有功能化的颗粒表面均表现出高度的润湿性，并导致牛血清白蛋白蛋白质的吸附量大大降低。颗粒涂层还显示出真菌孢子附着力的降低（具有耗散监测功能的石英晶体微重力法被用作高通量技术，用于监测和优化对二氧化硅纳米粒子表面的反应。纳米颗粒薄膜的功能化是快速的，并且可以在很宽的pH范围内和低两性离子浓度下实现。所有功能化的颗粒表面均表现出高度的润湿性，并导致牛血清白蛋白蛋白质的吸附量大大降低。颗粒涂层还显示出真菌孢子附着力的降低（具有耗散监测功能的石英晶体微重力法被用作高通量技术，用于监测和优化对二氧化硅纳米粒子表面的反应。纳米颗粒薄膜的功能化是快速的，并且可以在很宽的pH范围内和低两性离子浓度下实现。所有功能化的颗粒表面均表现出高度的润湿性，并导致牛血清白蛋白蛋白质的吸附量大大降低。颗粒涂层还显示出真菌孢子附着力的降低（所有功能化的颗粒表面均表现出高度的润湿性，并导致牛血清白蛋白蛋白质的吸附量大大降低。颗粒涂层还显示出真菌孢子附着力的降低（所有功能化的颗粒表面均表现出高度的润湿性，并导致牛血清白蛋白蛋白质的吸附量大大降低。颗粒涂层还显示出真菌孢子附着力的降低（表皮葡萄球菌和细菌（大肠杆菌）分别高达87％和96％。这些结果表明功能化的纳米二氧化硅有可能被进一步开发为用于广泛的涂料应用的通用的防污涂料。

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Silica Nanoparticles Functionalized with Zwitterionic Sulfobetaine Siloxane for Application as a Versatile Antifouling Coating System

The growing need to develop surfaces able to effectively resist biological fouling has resulted in the widespread investigation of nanomaterials with potential antifouling properties. However, the preparation of effective antifouling coatings is limited by the availability of reactive surface functional groups and our ability to carefully control and organize chemistries at a materials’ interface. Here, we present two methods of preparing hydrophilic low-fouling surface coatings through reaction of silica-nanoparticle suspensions and predeposited silica-nanoparticle films with zwitterionic sulfobetaine (SB). Silica-nanoparticle suspensions were functionalized with SB across three pH conditions and deposited as thin films via a simple spin-coating process to generate hydrophilic antifouling coatings. In addition, coatings of predeposited silica nanoparticles were surface functionalized via exposure to zwitterionic solutions. Quartz crystal microgravimetry with dissipation monitoring was employed as a high throughput technique for monitoring and optimizing reaction to the silica-nanoparticle surfaces. Functionalization of nanoparticle films was rapid and could be achieved over a wide pH range and at low zwitterion concentrations. All functionalized particle surfaces presented a high degree of wettability and resulted in large reductions in adsorption of bovine serum albumin protein. Particle coatings also showed a reduction in adhesion of fungal spores (Epicoccum nigrum) and bacteria (Escherichia coli) by up to 87 and 96%, respectively. These results indicate the potential for functionalized nanosilicas to be further developed as versatile fouling-resistant coatings for widespread coating applications.

更新日期：2017-05-31

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