基于硅酸铝纤维的柔性氧敏感元件的制备和性能  

Preparation and Properties of Aluminum Silicate Fiber Supported PtTFPP-PDMS Flexible Oxygen Sensing Components

作　　者：赵雅文 屈发进 汪岩屹 王智文 陈初升[1] ZHAO Yawen;QU Fajin;WANG Yanyi;WANG Zhiwen;CHEN Chusheng(Department of Materials Science and Engineering,University of Science and Technology of China,Hefei 230026,China;Institute of Advanced Technology,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学材料科学与工程系,合肥230026 [2]中国科学技术大学先进技术研究院,合肥230026

出　　处：《无机材料学报》2024年第10期1084-1090,I0001,共8页Journal of Inorganic Materials

基　　金：国家自然科学基金(21271164)。

摘　　要：柔性传感器可以适应各种复杂环境和曲面形状,在生物医学、环境监测和智能可穿戴设备等领域具有广泛的应用前景。本研究旨在研发高稳定性的荧光淬灭型柔性氧敏感元件。采用硅酸铝纤维作为载体,聚二甲基硅氧烷(Polydimethysiloxane,PDMS)作为基质,四(五氟苯基)卟啉铂(Platinum(Ⅱ)-5,10,15,20-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin,PtTFPP)荧光分子作为氧探针,制备了柔性氧敏感元件。该元件的水接触角高达152°,显示出超疏水性,这有助于提升其在潮湿气氛和水溶液中的稳定性。元件对气相氧和溶解氧均表现出荧光淬灭效应,荧光强度与氧含量之间的关系符合Stern-Volmer方程,其气相Stern-Volmer常数KSV为0.020 h·Pa^(-1),水相Stern-Volmer常数KSV为2.94 L·mmol^(-1)。该氧敏感元件具有出色的循环可恢复性和响应性能:从氮气切换至氧气的响应时间为0.9 s,从氧气切换至氮气为2.7 s。此外,PtTFPP-PDMS膜具有出色的稳定性,暴露于100℃水蒸气15 h、在pH 1~10的水溶液中浸泡和经历400次的弯曲循环后,其相对荧光强度和水接触角均无明显变化。以硅酸铝纤维为载体的PtTFPP-PDMS柔性元件具有优异的荧光氧敏感性和稳定性,有望用于苛刻条件下气相氧和溶解氧的测定。Flexible sensors have wide applications in various fields such as biomedicine,environmental monitoring and smart wearable devices,as they can adapt to diverse complex environments and curved surfaces.This study aimed to develop resilient and flexible oxygen sensors based on fluorescence quenching.A flexible oxygen sensing component was prepared,comprising aluminum silicate fibers as the support,polydimethysiloxane(PDMS)as the matrix,and platinum tetrakis pentafluorophenyl porphyrin(PtTFPP)as the oxygen probe.The component exhibited superhydrophobicity with a water contact angle of 152°,which was beneficial for maintaining integrity in humid atmospheres and aqueous solutions.It showed the fluorescence quenching effect towards gaseous oxygen and dissolved oxygen in water,which could be well fitted by the Stern-Volmer equation with KSV constants of 0.020 h·Pa^(-1) for the gaseous oxygen and 2.94 L·mmol^(-1) for the dissolved oxygen.The component also demonstrated good reversibility and fast response in rapidly altered atmosphere,with a response time of 0.9 s from nitrogen switching to oxygen and a recovery time of 2.7 s from oxygen switching to nitrogen.Additionally,the PtTFPP-PDMS component displayed remarkable stability concerning its relative fluorescence intensity and water contact angle even after exposure to 100℃steam for 15 h,soaking in pH 1-10 aqueous solutions,and enduring 400 bending cycles.The aluminum silicate fiber-supported PtTFPP-PDMS film developed in this study exhibited excellent fluorescent oxygen sensing properties and stability,making it a promising candidate for oxygen sensors,and suitable for determination of gaseous and dissolved oxygen in challenging environments.

关 键 词：硅酸铝纤维 PDMS PtTFPP 柔性氧敏感元件 超疏水性 

分 类 号：TB34[一般工业技术—材料科学与工程]