Liquids with High Compressibility.
Liquids with High Compressibility.
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高压缩性液体。
DOI：
10.1002/adma.202306521
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Lai B
中科院分区：
文献类型：
--
作者：
Lai B
压缩性是所有材料的基本性质。对于流体，即气体和液体，可压缩性形成了流体力学和水力学等技术的基础，并决定了声音和冲击波传播等基本现象。与气体相反，液体几乎是不可压缩的。如果液体的可压缩性能够得到提高和控制，就可能在液压和减震方面产生新的应用。在此，表明将疏水性多孔颗粒分散到水中得到的水性悬浮液具有比任何正常液体如水大得多的压缩性（具体地，在某些压力范围内高达20倍）。增加的可压缩性是由于水分子在施加的压力下被迫进入颗粒的疏水孔中。压缩程度可以通过改变所添加的多孔颗粒的量来控制。此外，压缩的压力范围可以通过添加甲醇来减小或通过添加盐来增大。在所有情况下，当释放所施加的压力时，液体膨胀回到其原始体积。这里所示的方法是简单和经济的，并可能扩大规模，以提供大量的高度可压缩的液体。
Compressibility is a fundamental property of all materials. For fluids, that is, gases and liquids, compressibility forms the basis of technologies such as pneumatics and hydraulics and determines basic phenomena such as the propagation of sound and shock waves. In contrast to gases, liquids are almost incompressible. If the compressibility of liquids could be increased and controlled, new applications in hydraulics and shock absorption could result. Here, it is shown that dispersing hydrophobic porous particles into water gives aqueous suspensions with much greater compressibilities than any normal liquids such as water (specifically, up to 20 times greater over certain pressure ranges). The increased compressibility results from water molecules being forced into the hydrophobic pores of the particles under applied pressure. The degree of compression can be controlled by varying the amount of porous particles added. Also, the pressure range of compression can be reduced by adding methanol or increased by adding salt. In all cases, the liquids expand back to their original volume when the applied pressure is released. The approach shown here is simple and economical and could potentially be scaled up to give large amounts of highly compressible liquids.