| CHENG Chen,DU Shi-guo,LU Yan-ling,LIU Xian-jie.Melamine-formaldehyde Resin Microencapsulated Red Phosphorus Modified in Sol-Gel Method[J],47(9):74-80 |
| Melamine-formaldehyde Resin Microencapsulated Red Phosphorus Modified in Sol-Gel Method |
| Received:April 18, 2018 Revised:September 20, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.09.010 |
| KeyWord:microcapsule sol-gel silica gel melamine-formaldehyde resin red phosphorus stability |
| Author | Institution |
| CHENG Chen |
1.Third Department, Army Engineering University, Shijiazhuang , China |
| DU Shi-guo |
1.Third Department, Army Engineering University, Shijiazhuang , China |
| LU Yan-ling |
1.Third Department, Army Engineering University, Shijiazhuang , China |
| LIU Xian-jie |
2.Reserve Division No.76, Yantai , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to improve performance of melamine-formaldehyde resin microencapsulated red phosphorus (MRP), modify it in sol-gel method, and study the optimum technological conditions. With tetraethoxysilane (TEOS) as precursor and TEOS additive amount as process conditions, silica gel-MF resin double layered microencapsulated red phosphorus (Si-MRP) was prepared via sol-gel modification. Surface morphology and coating effect of Si-MRP were characterized by FT-IR, SEM and XPS. Meanwhile, moisture rate, thermal stability and sensitivity of the samples were also tested. A layer of silica gel structure was introduced on the surface of MRP in sol-gel method successfully to coatsilica gel-MF resin double layered microencapsulated red phosphorus (Si-MRP). The morphology and coating ratio of Si-MRP was influenced by the TEOS additive amount. With the increase of TEOS, surface morphology of Si-MRP transformed from stratiform structure to particle accumulation structure, and the coating ratio decreased from 97.5% to 93.6%. The silica gel structure enhanced thermal and mechanical stability of MRP, and decreased moisture rate. Provided with TEOS-MRP mass ratio of 1:2.5, ignition temperature of Si-MRP prepared increased by 80 ℃ compared with MRP, and the moisture rate and friction sensitivity decreased to 3.7% and 14%, respectively. MRP can be microencapsulated effectively in sol-gel method, and performance of the samples can be further improved after microencapsulation. |
| Close |
|
|
|