Amino acid functionalized boron nitride nanosheets towards enhanced thermal and mechanical performance of epoxy composite

Wu, Ni; Yang, Wang; Li, Huawei; Che, Sai; Gao, Can; Jiang, Bo; Li, Zhengxuan; Xu, Chong; Wang, Xiaobai; Li, Yongfeng

doi:10.1016/j.jcis.2022.03.115

Cited by 22 publications

(18 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the surface-functionalization-assisted exfoliation method, noncovalent modification approaches based on the Lewis acid-base reaction mechanism aroused the interest of researchers. Recently, natural amino acids, a kind of bio-renewable raw material, have attracted considerable interest because they are extensive sources of rich reactive functional groups and have excellent biocompatibility and biodegradability [ 23 , 24 , 25 ]. The molecular architecture of L -lysine shows that it has highly reactive amino and carboxyl groups as well as R-side chains.…”

Section: Introductionmentioning

confidence: 99%

Amino Acid-Assisted Sand-Milling Exfoliation of Boron Nitride Nanosheets for High Thermally Conductive Thermoplastic Polyurethane Composites

et al. 2022

View full text Add to dashboard Cite

Boron nitride nanosheets (BNNSs) show excellent thermal, electrical, optical, and mechanical properties. They are often used as fillers in polymers to prepare thermally conductive composites, which are used in the production of materials for thermal management, such as electronic packaging. Aside from the van der Waals force, there are some ionic bond forces between hexagonal boron nitride (h-BN) layers that result in high energy consumption and make BNNSs easily agglomerate. To overcome this issue, L-lysine (Lys) was first employed as a stripping assistant for preparing graft-functionalized BNNSs via mechanical sand-milling technology, and the obtained Lys@BNNSs can be added into thermoplastic polyurethane (TPU) by solution mixing and hot-pressing methods to prepare thermally conductive composites. This green and scalable method of amino acid-assisted sand-milling can not only exfoliate the bulk h-BN successfully into few-layer BNNSs but also graft Lys onto the surface or edges of BNNSs through Lewis acid–base interaction. Furthermore, benefiting from Lys’s highly reactive groups and biocompatibility, the compatibility between functionalized BNNSs and the TPU matrix is significantly enhanced, and the thermal conductivity and mechanical properties of the composite are remarkably increased. When the load of Lys@BNNSs is 3 wt%, the thermal conductivity and tensile strength of the obtained composites are 90% and 16% higher than those of the pure TPU, respectively. With better thermal and mechanical properties, Lys@BNNS/TPU composites can be used as a kind of heat dissipation material and have potential applications in the field of thermal management materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Amino Acid-Assisted Sand-Milling Exfoliation of Boron Nitride Nanosheets for High Thermally Conductive Thermoplastic Polyurethane Composites

et al. 2022

View full text Add to dashboard Cite

show abstract

“…In addition, PT displays a broad band at 3405 cm –1 due to the overlap of hydroxyl and amino groups and blue-shifts by 26 cm –1 compared to PU, indicating the existence of hydrogen bonds between PU and TA . As for PT/fBN, two BN characteristic bands appear at 1379 and 818 cm –1 , respectively . Besides, some weak PU feature bands located at 1000–1700 cm –1 are observed due to overlapping by strong BN feature peaks.…”

Section: Resultsmentioning

confidence: 96%

“…25 As for PT/fBN, two BN characteristic bands appear at 1379 and 818 cm −1 , respectively. 26 Besides, some weak PU feature bands located at 1000−1700 cm −1 are observed due to overlapping by strong BN feature peaks. Notably, the hydroxyl stretching band of PT/fBN further blue-shifts from 3405 to 3388 cm −1 owing to the hydrogen bond interaction between hydroxyl groups on the PT foam and fBN nanosheets.…”

Section: Production and Characterization Of Pt/fbn/mentioning

confidence: 98%

Dual Network Structures of Polyurethane/Boron Nitride Nanosheets/Alumina for Improved Thermal Management of Polymers

Wu,

Che,

Sun

et al. 2023

ACS Appl. Nano Mater.

Self Cite

View full text Add to dashboard Cite

The development of efficient thermally conductive polymer composites is crucial for the performance upgrade of modern electronics. However, the thermal conductivity of polymer composites is dramatically limited by inadequate thermal networks and mechanical properties degradation. Herein, we report the preparation of polydimethylsiloxane (PDMS) composites with dual thermal networks of functionalized boron nitride nanosheets (fBNs) and alumina (Al2O3) spheres impregnated in commercial polyurethane (PU) foams. The fBN layers are first assembled hydrothermally onto the surface of tannic acid (TA)-modified PU foam (PT) to form a 3D fBN network, followed by the vacuum infiltration of Al2O3/PDMS to obtain PT/fBN/Al2O3/PDMS composites. The thermal conductivity of the composite reaches 3.1 W/mK at 11.5 wt % fBN and 15 wt % Al2O3 loading, with a 2285% enhancement compared to that of pure PDMS. Moreover, the resulting composite shows excellent practical performance in the heat dissipation simulation of integrated chips, demonstrating the broad prospect for thermal management applications. Additionally, the mechanical properties of the composite are significantly improved. This work provides a promising strategy for the production of polymer-based high-performance thermal management materials.

show abstract

“…As shown in Figure a, the Raman peaks of BNNS-t and BNNS-b are located at 1365.9 and 1363.4 cm –1 , respectively. Both peaks display the BN structure and are related to the E 2g phonon mode of BN . The infrared spectra of BNNS-t and BNNS-b are shown in Figure b.…”

Section: Resultsmentioning

confidence: 96%

“…Both peaks display the BN structure and are related to the E 2g phonon mode of BN. 37 The infrared spectra of BNNS-t and BNNS-b are shown in Figure 4 b. Two characteristic absorption peaks of BNNS-t are located at 1373.58 and 820.70 cm –1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Angular-Shaped Boron Nitride Nanosheets with a High Aspect Ratio to Improve the Out-of-Plane Thermal Conductivity of Polyimide Composite Films

et al. 2022

View full text Add to dashboard Cite

Polyimide/boron nitride nanosheet (PI/BNNS) composite films have potential applications in the field of electrical devices due to the superior thermal conductivity and outstanding insulating properties of the boron nitride nanosheet. In this study, the boron nitride nanosheet (BNNS-t) was prepared by the template method using sodium chloride as the template, and B 2 O 3 and flowing ammonia as the boron and nitrogen sources, respectively. Then, the PI/ BNNS-t composite films were investigated with different loading of BNNS-t as thermally conductive fillers. The results show that BNNS-t has a high aspect ratio and a uniform lateral dimension, with a large dimension and a thin thickness, and there are a few nanosheets with angular shapes in the as-obtained BNNS-t. The synergistic effect of the above characteristics for BNNS-t is beneficial to constructing the three-dimensional heat conduction network of the PI/BNNS-t composite films, which can significantly improve the out-of-plane thermal conduction properties. And then, the out-of-plane thermal conductivity of the PI/BNNS-t composite film achieves 0.67 W m −1 K −1 at 40% loading, which is nearly 3.5 times that of the PI film.

show abstract

Amino acid functionalized boron nitride nanosheets towards enhanced thermal and mechanical performance of epoxy composite

Cited by 22 publications

References 77 publications

Amino Acid-Assisted Sand-Milling Exfoliation of Boron Nitride Nanosheets for High Thermally Conductive Thermoplastic Polyurethane Composites

Amino Acid-Assisted Sand-Milling Exfoliation of Boron Nitride Nanosheets for High Thermally Conductive Thermoplastic Polyurethane Composites

Dual Network Structures of Polyurethane/Boron Nitride Nanosheets/Alumina for Improved Thermal Management of Polymers

Angular-Shaped Boron Nitride Nanosheets with a High Aspect Ratio to Improve the Out-of-Plane Thermal Conductivity of Polyimide Composite Films

Contact Info

Product

Resources

About