Highly Sensitive Detection of Fe3+ Ions Using Waterborne Polyurethane‐Carbon Dots Self‐Healable Fluorescence Film,Macromolecular Materials and Engineering

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Highly Sensitive Detection of Fe3+ Ions Using Waterborne Polyurethane‐Carbon Dots Self‐Healable Fluorescence Film
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-02-13 , DOI: 10.1002/mame.201900810
Luqi Xiao _{1,

2} , Jun Shi, _{1,

3,

4} , Bingfei Nan _{1,

2} , Weilong Chen _{1,

2} , Qiang Zhang _{1,

2} , Ending Zhang _{1,

2} , Mangeng Lu _{1,

3,

4}

Affiliation

In this study, nitrogen‐doped carbon dots (N‐C‐dots) are synthesized via a green and gentle electrochemical‐hydrothermal method. The N‐C‐dots are grafted into the backbone of waterborne polyurethane (WBPU) synthesized from hexamethylene diisocyanate and polycarbonate diol (PCDL). Due to the introduction of N‐C‐dots, the WBPU is functionalized including being able to self heal and specifically identified Fe³⁺. The self‐healing performance of the WBPU‐N‐C‐dots film is principally attributed to the hydrogen bonding effect of the WBPU and the N‐C‐dots. On the other hand, based on the quenching of fluorescent characteristics of the WBPU‐N‐C‐dots film, it is successfully used in the detection of Fe³⁺, showing a wide detection range, good selectivity, and high sensitivity. What's more, the tensile strength of the sample is enhanced from 3.50 to 7.12 MPa when the N‐C‐dots content is increased in the WBPU and the thermal stability is improved as a result of the formation of the more thermally‐stable network structures. Interestingly, compared to the traditional solution detection in WBPU‐N‐C‐dots emulsion with the limit of detection of 2.23 × 10⁻⁶ m, the detection has the lower limit of detection of 2.19 × 10⁻⁶ m in the WBPU‐N‐C‐dots film. These results show that the WBPU‐N‐C‐dots film exhibits great application as an intelligent response‐type material.

中文翻译：

水性聚氨酯碳点自修复荧光膜对Fe3 +离子的高灵敏度检测

在这项研究中，通过绿色且温和的电化学-水热法合成了氮掺杂的碳点（NC点）。N-C-点被接枝到由六亚甲基二异氰酸酯和聚碳酸酯二醇（PCDL）合成的水性聚氨酯（WBPU）的骨架中。由于引入了N-C点，WBPU的功能得以实现，包括能够自我修复并特别鉴定出Fe ^3+的功能。WBPU-NC点的薄膜的自我修复性能主要归因于WBPU和NC点的氢键作用。另一方面，基于WBPU‐NC‐C点膜的荧光特性的猝灭，它已成功用于检测Fe ³⁺，检测范围广，选择性好，灵敏度高。此外，当WBPU中NC点含量增加时，样品的拉伸强度从3.50 MPa提高到7.12 MPa，并且由于形成了更热稳定的网络结构而提高了热稳定性。有趣的是，与WBPU‐NC‐C点乳液中的传统溶液检测方法相比，其检测限为2.23×10 ^-6 m，而WBPU‐N中的检测限为2.19×10 ^-6 m -C点胶卷。这些结果表明，WBPU‐N‐C点膜作为一种智能响应型材料具有广阔的应用前景。

更新日期：2020-03-12

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