Nga Do T, Phan Anh D, Lam Vu D, Woods Lilia M, Wakabayashi Katsunori
Institute of Physics, Vietnam Academy of Science and Technology 10 Dao Tan, Ba Dinh Hanoi 10000 Vietnam
Phenikaa Institute for Advanced Study, Artificial Intelligence Laboratory, Faculty of Computer Science, Materials Science and Engineering, Phenikaa University Hanoi 12116 Vietnam
RSC Adv. 2020 Jul 31;10(47):28447-28453. doi: 10.1039/d0ra04558f. eCollection 2020 Jul 27.
The photothermal energy conversion in hanging and floating polyaniline (PANi)-cotton fabrics is investigated using a model based on the heat diffusion equation. Perfect absorption and anti-reflection of wet hanging PANi-cotton fabrics cause quick transfer of total incident light into water confining nearly 100% of the sunlight. As a result, a hanging membrane is found to have more attractive properties than a floating above water fabric. We find, however, that the photothermal properties of a floating PANi-cotton membrane can greatly be enhanced by dispersing TiN nanoparticles in the water below the fabric. The calculated temperature gradients for TiN nanoparticle solutions show that the absorbed energy grows with increasing the nanoparticle density and that the photothermal process occurs mostly near the surface. The collective heating effects depend on the size and density of nanoparticles, which can further be used to modulate the photothermal process.
利用基于热扩散方程的模型，对悬挂和漂浮的聚苯胺（PANi）-棉织物中的光热能量转换进行了研究。湿悬挂的PANi-棉织物的完美吸收和抗反射特性，使得总入射光迅速转移到水中，几乎限制了100%的太阳光。结果发现，悬挂膜比漂浮在水面上的织物具有更吸引人的特性。然而，我们发现，通过在织物下方的水中分散TiN纳米颗粒，可以大大提高漂浮的PANi-棉膜的光热性能。TiN纳米颗粒溶液的计算温度梯度表明，吸收的能量随着纳米颗粒密度的增加而增长，并且光热过程主要发生在表面附近。集体加热效应取决于纳米颗粒的尺寸和密度，这可以进一步用于调节光热过程。
