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Two-Dimensional MoO2 Nanosheet Composite Hydrogels with High Transmittance and Excellent Photothermal Property for Near-Infrared Responsive Actuators and Microvalves
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-07-11 , DOI: 10.1021/acsami.1c04110
Zhichao Sun 1 , Cong Wei 1 , Wentao Liu 1 , Hao Liu 1 , Jiahui Liu 1 , Rui Hao 1 , Miaoming Huang 1 , Suqin He 1, 2
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-07-11 , DOI: 10.1021/acsami.1c04110
Zhichao Sun 1 , Cong Wei 1 , Wentao Liu 1 , Hao Liu 1 , Jiahui Liu 1 , Rui Hao 1 , Miaoming Huang 1 , Suqin He 1, 2
Affiliation
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Stimulus-responsive intelligent hydrogel actuators have highly promising applications in the fields of soft robotics, smart manipulators, and flexible devices. Near-infrared (NIR) light is considered an ideal method to trigger the response behavior remotely and precisely. In order to realize the excellent optical transmittance and photothermal property of NIR-responsive hydrogels at the same time, two-dimensional nonlayered MoO2 nanosheets (2D-MoO2) with excellent photothermal efficiency (62% under an NIR light irradiation of 808 nm), splendid chemistry stability, and low preparation cost are used as photothermal agents and incorporated into the poly(N-isopropylacrylamide) (PNIPAM) hydrogel network, forming the 2D-MoO2/Laponite/PNIPAM ternary nanocomposite hydrogel (TN hydrogel). It is remarkable that compared with the GO and MXene hydrogels with the same agent content (1.0 mg mL–1) and thickness (1 mm) whose transmittance values are only ∼5% at 600 nm, the TN hydrogel shows a similar NIR-responsive temperature, but much higher optical transmittance (∼53%). Besides, of the three hydrogels with similar transmittance, the TN hydrogel shows a much higher NIR-responsive temperature. The TN hydrogel with a low loading of 2D-MoO2 (1.5 mg mL–1) can produce a significant temperature increase of ∼30 °C after the application of 0.8 W cm–2 NIR light irradiation for 15 s. Impressively, the TN hydrogel exhibits excellent anti-fatigue property, keeping a fast response and temperature rise behavior even after 50 times of heating–cooling cycles. The flexibly controllable and reversible deformation is realized by a well-designed bilayer structure even in harsh environments. The transparent and asymmetric bilayer hydrogel is further used as a soft manipulator to capture objects visually and accurately. The NIR light-controlled microvalve based on this composite hydrogel is also demonstrated. This work provides a novel kind of transparent hybrid NIR response hydrogel for the further development of smart, programmable, reversible hydrogel-based actuators and soft robotics.
中文翻译:
具有高透光率和优异光热性能的二维 MoO 2纳米片复合水凝胶,用于近红外响应执行器和微型阀
刺激响应智能水凝胶执行器在软机器人、智能机械手和柔性设备领域具有非常有前景的应用。近红外 (NIR) 光被认为是远程精确触发响应行为的理想方法。为了同时实现近红外响应水凝胶优异的透光率和光热性能,二维非层状MoO 2纳米片(2D-MoO 2)具有优异的光热效率(在808 nm的近红外光照射下为62%) ,优异的化学稳定性和低制备成本被用作光热剂并结合到聚(N-异丙基丙烯酰胺)(PNIPAM)水凝胶网络中,形成2D-MoO 2/Laponite/PNIPAM 三元纳米复合水凝胶(TN 水凝胶)。值得注意的是,与具有相同药剂含量 (1.0 mg mL –1 ) 和厚度 (1 mm)的 GO 和 MXene 水凝胶相比,其在 600 nm 处的透射率值仅为 ~5%,TN 水凝胶显示出类似的 NIR 响应温度,但光透射率要高得多(~53%)。此外,在具有相似透光率的三种水凝胶中,TN 水凝胶显示出更高的 NIR 响应温度。具有低负载 2D-MoO 2 (1.5 mg mL –1 )的 TN 水凝胶在应用 0.8 W cm –2后可使温度显着升高约 30 °C近红外光照射 15 秒。令人印象深刻的是,TN 水凝胶表现出优异的抗疲劳性能,即使在 50 次加热-冷却循环后仍保持快速响应和温升行为。即使在恶劣的环境下,精心设计的双层结构也能实现灵活可控和可逆的变形。透明且不对称的双层水凝胶进一步用作软机械手,以视觉和准确地捕捉物体。还展示了基于这种复合水凝胶的 NIR 光控微阀。这项工作提供了一种新型的透明混合 NIR 响应水凝胶,用于进一步开发智能、可编程、可逆的水凝胶驱动器和软机器人。
更新日期:2021-07-21
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
具有高透光率和优异光热性能的二维 MoO 2纳米片复合水凝胶,用于近红外响应执行器和微型阀
刺激响应智能水凝胶执行器在软机器人、智能机械手和柔性设备领域具有非常有前景的应用。近红外 (NIR) 光被认为是远程精确触发响应行为的理想方法。为了同时实现近红外响应水凝胶优异的透光率和光热性能,二维非层状MoO 2纳米片(2D-MoO 2)具有优异的光热效率(在808 nm的近红外光照射下为62%) ,优异的化学稳定性和低制备成本被用作光热剂并结合到聚(N-异丙基丙烯酰胺)(PNIPAM)水凝胶网络中,形成2D-MoO 2/Laponite/PNIPAM 三元纳米复合水凝胶(TN 水凝胶)。值得注意的是,与具有相同药剂含量 (1.0 mg mL –1 ) 和厚度 (1 mm)的 GO 和 MXene 水凝胶相比,其在 600 nm 处的透射率值仅为 ~5%,TN 水凝胶显示出类似的 NIR 响应温度,但光透射率要高得多(~53%)。此外,在具有相似透光率的三种水凝胶中,TN 水凝胶显示出更高的 NIR 响应温度。具有低负载 2D-MoO 2 (1.5 mg mL –1 )的 TN 水凝胶在应用 0.8 W cm –2后可使温度显着升高约 30 °C近红外光照射 15 秒。令人印象深刻的是,TN 水凝胶表现出优异的抗疲劳性能,即使在 50 次加热-冷却循环后仍保持快速响应和温升行为。即使在恶劣的环境下,精心设计的双层结构也能实现灵活可控和可逆的变形。透明且不对称的双层水凝胶进一步用作软机械手,以视觉和准确地捕捉物体。还展示了基于这种复合水凝胶的 NIR 光控微阀。这项工作提供了一种新型的透明混合 NIR 响应水凝胶,用于进一步开发智能、可编程、可逆的水凝胶驱动器和软机器人。