New fabric could help keep you cool in the summer, even without A/
C

Date:
July 29, 2020
Source:
American Chemical Society
Summary:
Air conditioning and other space cooling methods account for
about 10% of all electricity consumption in the U.S., according
to the U.S. Energy Information Administration. Now, researchers
have developed a material that cools the wearer without using
any electricity. The fabric transfers heat, allows moisture to
evaporate from the skin and repels water.



FULL STORY ==========================================================================
Air conditioning and other space cooling methods account for about 10%
of all electricity consumption in the U.S., according to the U.S. Energy Information Administration. Now, researchers reporting in ACS Applied
Materials & Interfaces have developed a material that cools the wearer
without using any electricity. The fabric transfers heat, allows moisture
to evaporate from the skin and repels water.


========================================================================== Cooling off a person's body is much more efficient than cooling an entire
room or building. Various clothing and textiles have been designed to do
just that, but most have disadvantages, such as poor cooling capacity;
large electricity consumption; complex, time-consuming manufacturing;
and/or high cost. Yang Si, Bin Ding and colleagues wanted to develop a
personal cooling fabric that could efficiently transfer heat away from
the body, while also being breathable, water repellent and easy to make.

The researchers made the new material by electrospinning a polymer (polyurethane), a water-repelling version of the polymer (fluorinated polyurethane) and a thermally conductive filler (boron nitride nanosheets)
into nanofibrous membranes. These membranes repelled water from the
outside, but they had large enough pores to allow sweat to evaporate
from the skin and air to circulate. The boron nitride nanosheets coated
the polymer nanofibers, forming a network that conducted heat from an
inside source to the outside air.

In tests, the thermal conductivity was higher than that of many other conventional or high-tech fabrics. The membrane could be useful not
only for personal cooling, but also for solar energy collection,
seawater desalination and thermal management of electronic devices,
the researchers say.


========================================================================== Story Source: Materials provided by American_Chemical_Society. Note:
Content may be edited for style and length.


========================================================================== Journal Reference:
1. Xi Yu, Yang Li, Xianfeng Wang, Yang Si, Jianyong Yu, Bin Ding.

Thermoconductive, Moisture-Permeable, and Superhydrophobic
Nanofibrous Membranes with Interpenetrated Boron Nitride Network
for Personal Cooling Fabrics. ACS Applied Materials & Interfaces,
2020; 12 (28): 32078 DOI: 10.1021/acsami.0c04486 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2020/07/200729124416.htm

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