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National Taiwan University of Science and Technology ACS Omega: Polymer-Assisted Dispersion of Boron Nitride/Graphene in Thermoplastic Polyurethane Blends for Cooling Smart Clothing

 Last Update: 2022-08-29
 Source: Internet
 Author: User

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In the context of global warming and climate change, avoiding and reducing energy waste has attracted increasing attention

The BN surface was modified to prepare BNOH and organic dispersants were synthesized to finely disperse GNP and BNOH; subsequently, they were combined with TPU

Figure 1.
Analysis diagram of dispersant SMAEF80-D2000

Figure 2.
(a) Schematic diagram of the preparation process of the BNOH-GNP/TPU composite membrane and (b) SEM image of the top surface of the 20% BNOH-GNP/TPU composite membrane (I) (the ratio of BNOH to GNP is 1:1).
) and digital photo insert, (II) top surface of 20% BNOH-GNP/TPU composite film (1:1 ratio of BNOH to GNP) to dispersant (1:10 ratio of dispersant to GNP filler) and digital photo inserts, (III) cross-sections of 20% BNOH-GNP/TPU composite films (1:1 ratio of BNOH to GNP), and (IV) cross-sections of 20% BNOH-GNP/TPU composite films ( The ratio of BNOH to GNP is 1:1) to dispersant (ratio of dispersant to filler is 1:10)

Figure 3.
(a) Thermal conductivity of BNOH-GNP/TPU and BNOH-GNP/TPU (1:1 ratio of BNOH to GNP) and dispersants with different fillers (1:10 ratio of dispersant to filler)

(b) TPU, 20% BN/TPU, 20% GNP/TPU, 20% BNOH-GNP/TPU and 20% BNOH-GNP/TPU with dispersant (1:1 ratio of BNOH to GNP and dispersant to filler the ratio is 1:10)

(c) Elongation at break of BNOH-GNP/TPU (1:1 ratio of BNOH to GNP) and dispersant (1:10 ratio of dispersant to filler) under different filler loads

(d) Contact angle measurement images of TPU, 20% BN/TPU, 20% GNP/TPU, 20% BNOH-GNP/TPU and 20% BNOH-GNP/TPU (1:1 ratio of BNOH to GNP) and dispersion agent (the ratio of dispersant to filler is 1:10)

(e) Thermal conductivity of BNOH-GNP/TPU and BNOH-GNP/TPU

Figure 4.
(a) FLIR thermal image and (b) data on film cooling time for TPU, 20% BNOH/TPU, 20% GNP/TPU, 20% BNOH-GNP/TPU, and 20% BNOH-GNP/TPU (BNOH vs.
1:1 ratio of GNP to dispersant (1:10 ratio of dispersant to filler) from 100 °C to room temperature

Figure 5.
(a) Real cooling performance measurements of T-shirts containing BNOH-GNP/TPU films with dispersant and active cooling source: (I) photographs and infrared thermal images of T-shirts, (II) without any hybrid film or cooling Source T-shirt, (III) T-shirt without blend film and 4W cooling for 10 minutes, (IV) T-shirt with blend film and 0-minute cooling, (V) T-shirt with blend film and 2 W cooling for 10 minutes , (VI) T-shirt with mixed film and 4W cooling for 10 min, and (VII) magnified view of the red rectangular area in (VI)

In conclusion, the facile method can be used to easily develop multifunctional thermal interface materials, break the passive effect of traditional commercial cooling clothing, and develop wearable cooling smart clothing with great commercial potential
.

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