PMID- 35057135 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220128 IS - 1996-1944 (Print) IS - 1996-1944 (Electronic) IS - 1996-1944 (Linking) VI - 15 IP - 2 DP - 2022 Jan 6 TI - Research Progress and Key Issues of Hydrodebenzylation of Hexabenzylhexaazaisowurtzitane (HBIW) in the Synthesis of High Energy Density Material Hexanitrohexaazaisowurtzitane (HNIW). LID - 10.3390/ma15020409 [doi] LID - 409 AB - High energy density materials (HEDM) are the subject of an extensive research effort in relation to the use of these compounds as components of rocket propellants, powders, and formulations of high-performance explosives. Hexanitrohexaazaisowurtzitane (HNIW, i.e., CL-20) has received much attention in these research fields for its specific impulse, burning rate, ballistics, and detonation velocity. In this paper, the development and performances of the explosives from the first to the fourth generation are briefly summarized, and the synthesis status of the fourth-generation explosive, HNIW, is reviewed. The key issues that restrict the development of industrial amplification synthesis of HNIW are analyzed, and the potential directions of development are proposed. It is pointed out that to synthesize new and efficient catalysts is the key to making the cost-effective manufacturing of CL-20 a reality. FAU - Tang, Xiaofei AU - Tang X AD - Xi'an Modern Chemistry Research Institute, Xi'an 710065, China. FAU - Zhu, Rui AU - Zhu R AD - College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China. FAU - Shi, Tianjing AU - Shi T AD - College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China. FAU - Wang, Yu AU - Wang Y AD - College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China. FAU - Niu, Xiaochen AU - Niu X AD - College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China. FAU - Zhang, Yao AU - Zhang Y AD - Xi'an Modern Chemistry Research Institute, Xi'an 710065, China. FAU - Zhu, Junchen AU - Zhu J AD - Xi'an Modern Chemistry Research Institute, Xi'an 710065, China. FAU - Li, Wei AU - Li W AD - Xi'an Modern Chemistry Research Institute, Xi'an 710065, China. FAU - Hu, Wanpeng AU - Hu W AD - College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China. FAU - Xu, Ruoqian AU - Xu R AD - Xi'an Modern Chemistry Research Institute, Xi'an 710065, China. LA - eng PT - Journal Article PT - Review DEP - 20220106 PL - Switzerland TA - Materials (Basel) JT - Materials (Basel, Switzerland) JID - 101555929 PMC - PMC8778682 OTO - NOTNLM OT - catalyst deactivation OT - catalyst development OT - hexabenzylhexaazaisowurtzitane (HBIW) OT - hexanitrohexaazaisowurtzitane (HNIW) OT - hydrodebenzylation COIS- The authors declare no conflict of interest. EDAT- 2022/01/22 06:00 MHDA- 2022/01/22 06:01 PMCR- 2022/01/06 CRDT- 2022/01/21 01:16 PHST- 2021/11/15 00:00 [received] PHST- 2021/12/25 00:00 [revised] PHST- 2021/12/29 00:00 [accepted] PHST- 2022/01/21 01:16 [entrez] PHST- 2022/01/22 06:00 [pubmed] PHST- 2022/01/22 06:01 [medline] PHST- 2022/01/06 00:00 [pmc-release] AID - ma15020409 [pii] AID - materials-15-00409 [pii] AID - 10.3390/ma15020409 [doi] PST - epublish SO - Materials (Basel). 2022 Jan 6;15(2):409. doi: 10.3390/ma15020409.