MoO3-x quantum dots-based hydrogel with excellent light-triggered self-healing efficiency and pressure sensitive photoluminescence for accurate remote force measurement
MoO3-x quantum dots-based hydrogel with excellent light-triggered self-healing efficiency and pressure sensitive photoluminescence for accurate remote force measurement
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DOI：
10.1016/j.mtphys.2022.100807
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发表时间：
2022-08
影响因子：
11.5
通讯作者：
Yiqiang Li;Yuanyuan Mi;Zheyu Liu;Yinping Liu;Weiye Zhang;Shangxing Qiu;M. A. Ramos;Travis Shihao H
中科院分区：
文献类型：
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作者：
Yiqiang Li;Yuanyuan Mi;Zheyu Liu;Yinping Liu;Weiye Zhang;Shangxing Qiu;M. A. Ramos;Travis Shihao H
同时具有光热和光致发光特性的多响应功能材料在柔性电子、器件和远程力检测与监控领域具有广阔的应用前景。本文提出了一种可行的方法，将MoO_3-x量子点(MoO_3-x量子点)和蓝色荧光碳点(B-Cd)引入到强水凝胶基质中，制备出同时具有光热和光致发光性能的新型复合水凝胶。除了呈现出特殊的多功能外，我们还发现光热MoO_3-xQds的加入提高了复合水凝胶的力学性能和自愈性能。经808 nm红外激光照射后，MoO_3-x-CDS-PVA(聚乙烯醇)水凝胶的温度在1分钟内可升高30℃，经S 40℃照射后，其自愈效率可提高一倍。此外，复合水凝胶的荧光强度与外力之间有很好的线性关系，可以用来监测一定范围内的外力。通过调整红外激光器以实现小力检测，可进一步提高监测范围和灵敏度。最后，将新型复合水凝胶成功地应用于石油工程领域的压裂裂缝监测和流体模型中不同位置的受力监测。
Multi-responsive functional materials with simultaneous photothermal and photoluminescent properties have broad applicational prospects in the field of flexible electronics, devices and remote force detection and monitor. Here, a feasible method is developed by introducing MoO3-xquantum dots (MoO3-xQDs) and blue fluorescent carbon dots (B-CDs) into a strong hydrogel matrix to fabricate a novel composite hydrogel with concurrent photothermal and photoluminescent properties. Besides rendering the peculiar multifunctionalities, we found that the addition of photothermal MoO3-xQDs enhances the mechanical properties and self-healing properties of the composite hydrogel. The temperature of the MoO3-x-CDs-PVA (Polyvinyl Alcohol) hydrogel can rise by 30 °C within 1 min after 808 nm infrared laser irradiation and the self-healing efficiency could double after 40 s of irradiation. Moreover, there is a good linear relationship between the fluorescence intensity of the composite hydrogel and the external force, which can be used to monitor the force within a certain range. The monitoring range and sensitivity can be further improved by adjusting the infrared laser to for small force detection. Finally, the novel composite hydrogel is successfully applied to fracture monitoring in fracturing and force monitoring at different locations in the fluid model in the field of petroleum engineering.