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| Preparation and Characterization of Chitosan Coated Microencapsulated Red Phosphorus |
| Received:January 11, 2022 Revised:January 26, 2022 |
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| DOI：10.7643/issn.1672-9242.2022.02.012 |
| KeyWord:red phosphorus chitosan friction sensitivity moisture absorption pyrotechnic agent microcapsule |
| Author | Institution |
| CHENG Chen |
Army Engineering University Shijiazhuang Campus, Shijiazhuang , China |
| LU Yan-ling |
Army Engineering University Shijiazhuang Campus, Shijiazhuang , China |
| YANG Jin-peng |
75833 Troops, Guangzhou , China |
| DU Shi-guo |
Army Engineering University Shijiazhuang Campus, Shijiazhuang , China |
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| Abstract: |
| In order to reduce the moisture absorption and sensitivity of red phosphorus (RP) pyrotechnic agent, so as to improve its safety performance in use, chitosan coated microencapsulated red phosphorus (CSRP) was prepared by an efficient and simple process with biological material chitosan (CS) as the shell structure. The CSRP was tested by infrared spectroscopy (FTIR), X-ray electron spectroscopy (XPS), scanning electron microscopy (SEM) and thermogravimetry (TG). The moisture absorption and sensitivity of RP and CSRP were also tested and characterized. The results show that the treated red phosphorus (RP) surface has been coated with a complete CS capsule structure, and the morphology, structure and surface element content have changed significantly. The moisture absorption test and sensitivity test of RP and CSRP were carried out. The experimental results show that compared with uncoated RP, the 10-day moisture absorption of CSRPsamples decreased from 15.1% to 5.13%, and the friction sensitivity decreased from 81% to 58%, showing good storage performance, which is helpful for subsequent use in pyrotechnic charge. CS capsule structure can effectively realize the surface modification of red phosphorus, and the modified red phosphorus has excellent performance. Compared with the traditional capsule structure, CS is more environmentally friendly and green, and has high practical application value. |
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