Enhancing Mechanical and Combustion Performance of Boron/Polymer Composites via Boron Particle Functionalization.

ACS Applied Materials & Interfaces
Yue JiangXiaolin Zheng

Abstract

High-speed air-breathing propulsion systems, such as solid fuel ramjets (SFRJ), are important for space exploration and national security. The development of SFRJ requires high-performance solid fuels with excellent mechanical and combustion properties. One of the current solid fuel candidates is composed of high-energy particles (e.g., boron (B)) and polymeric binder (e.g., hydroxyl-terminated polybutadiene (HTPB)). However, the opposite polarities of the boron surface and HTPB lead to poor B particle dispersion and distribution within HTPB. Herein, we demonstrate that the surface functionalization of B particles with nonpolar oleoyl chloride greatly improves the dispersion and distribution of B particles within HTPB. The improved particle dispersion is quantitatively visualized through X-ray computed tomography imaging, and the particle/matrix interaction is evaluated by dynamic mechanical analysis. The surface-functionalized B particles can be uniformly dispersed up to 40 wt % in HTPB, the highest mass loading reported to date. The surface-functionalized B (40 wt %)/HTPB composite exhibits a 63.3% higher Young's modulus, 87.5% higher tensile strength, 16.2% higher toughness, and 16.8% higher heat of combustion than pristine ...Continue Reading

References

Aug 9, 2005·Nature Materials·Amitabh BansalLinda S Schadler
Feb 1, 2007·Chemical Communications : Chem Comm·Alexandra L PickeringPhilip P Power
Feb 18, 2010·Composites Science and Technology·Lesley M HammingL Catherine Brinson
Mar 31, 2015·ACS Applied Materials & Interfaces·Xiangyu LiMichael R Zachariah
Aug 23, 2017·ACS Applied Materials & Interfaces·Yadienka Martinez-RubiBenoit Simard
Jul 28, 2019·ACS Applied Materials & Interfaces·Wenjiang LuHua-Xin Peng
Feb 12, 2020·ACS Applied Materials & Interfaces·Wu Bin YingRun-Wei Li

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