Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Stabilization of AlH3 Crystals by the Coating of Hydrophobic PFPE and Resulted Reactivity with Ammonium Perchlorate
Langmuir ( IF 3.7 ) Pub Date : 2023-05-23 , DOI: 10.1021/acs.langmuir.3c00711 Ming-Hui Yu 1 , Su-Lan Yang 1 , Wu-Xi Xie 2 , Ya-Jin Li 2 , He-Ping Li 3 , Qi-Long Yan 1
Langmuir ( IF 3.7 ) Pub Date : 2023-05-23 , DOI: 10.1021/acs.langmuir.3c00711 Ming-Hui Yu 1 , Su-Lan Yang 1 , Wu-Xi Xie 2 , Ya-Jin Li 2 , He-Ping Li 3 , Qi-Long Yan 1
Affiliation
|
Aluminum hydride (AlH3) is a promising fuel component of solid propellant, but its stabilization is still challenging. Herein, surface functionalization of hydrophobic perfluoropolyether (PFPE) followed by ammonium perchlorate (AP) coating has been implemented. In particular, AlH3@PFPE@xAP (x = 10, 30, 50, or 64.21%) composites (AHFPs) were prepared by a spray-drying technique. The PFPE-functionalized AlH3 with a hydrophobic surface shows an increased water contact angle (WCA) from 51.87° to 113.54°. Compared with pure AlH3, the initial decomposition temperatures of AHFPs were increased by 17 °C, and the decomposition properties of AP in the AHFPs were also enhanced with significantly decreased peak temperature and fairly increased energy output. Moreover, the decomposition induction time of AHFPs-30% was improved by almost 1.82 times that of raw AlH3, which indicates that the coatings of PFPE and AP could improve the stability of AlH3. The maximum flame radiation intensity of AHFPs-30% was 21.6 × 103, which is almost 7.71 times that of pure AlH3 (2.8 × 103).
中文翻译：
疏水性 PFPE 涂层稳定 AlH3 晶体及其与高氯酸铵的反应性
氢化铝 (AlH 3 ) 是一种很有前途的固体推进剂燃料成分，但其稳定性仍然具有挑战性。在此，实施了疏水性全氟聚醚 (PFPE) 的表面功能化，然后进行高氯酸铵 (AP) 涂层。特别是，AlH 3 @PFPE@ x AP（x = 10、30、50 或 64.21%）复合材料（AHFP）是通过喷雾干燥技术制备的。具有疏水表面的PFPE 官能化 AlH 3的水接触角 (WCA) 从 51.87° 增加到 113.54°。与纯AlH 3相比, AHFPs 的初始分解温度提高了 17 °C，AHFPs 中 AP 的分解性能也得到增强，峰值温度显着降低，能量输出相当增加。此外，AHFPs-30% 的分解诱导时间比原始 AlH 3提高了近 1.82 倍，这表明 PFPE 和 AP 涂层可以提高 AlH 3的稳定性。AHFPs-30%的最大火焰辐射强度为21.6×10 3 ，几乎是纯AlH 3 (2.8×10 3 )的7.71倍。
更新日期：2023-05-23
中文翻译：
疏水性 PFPE 涂层稳定 AlH3 晶体及其与高氯酸铵的反应性
氢化铝 (AlH 3 ) 是一种很有前途的固体推进剂燃料成分，但其稳定性仍然具有挑战性。在此，实施了疏水性全氟聚醚 (PFPE) 的表面功能化，然后进行高氯酸铵 (AP) 涂层。特别是，AlH 3 @PFPE@ x AP（x = 10、30、50 或 64.21%）复合材料（AHFP）是通过喷雾干燥技术制备的。具有疏水表面的PFPE 官能化 AlH 3的水接触角 (WCA) 从 51.87° 增加到 113.54°。与纯AlH 3相比, AHFPs 的初始分解温度提高了 17 °C，AHFPs 中 AP 的分解性能也得到增强，峰值温度显着降低，能量输出相当增加。此外，AHFPs-30% 的分解诱导时间比原始 AlH 3提高了近 1.82 倍，这表明 PFPE 和 AP 涂层可以提高 AlH 3的稳定性。AHFPs-30%的最大火焰辐射强度为21.6×10 3 ，几乎是纯AlH 3 (2.8×10 3 )的7.71倍。
京公网安备 11010802027423号