The Basic Research On The Application Of Micro-crystal Muscovite In Insulating Pouring Sealant Functional Composite Material

Micro-crystal muscovite is a new style nonmetallic mineral resource. In order to make deeperdevelopment and utilization of the advantageous resource in Sichuan, and based on the excellentinsulation properties of muscovite, the basic research on the application of micro-crystalmuscovite in insulating pouring sealant functional composite material has been done in thedissertation. The dispersibility and settleability of micro-crystal muscovite and its modifiedproducts in epoxy resin have been studied particularly, and the electrical properties andmicro-structure of micro-crystal muscovite insulating pouring sealant have been deeply researched.The results have been made as follows.(1) The rotational viscosimeter has been used to measure and analyse the dispersibility of 600mesh micro-crystal muscovite and its products modified by three different coupling agents. Theresults show that the dispersibility of micro-crystal muscovite modified by coupling agents inliquid paraffin and epoxy resin is better than that of micro-crystal muscovite; The dispersibility ofmicro-crystal muscovite modified by coupling agent 3# in liquid paraffin and epoxy resin is thebest.(2) The spectrophotometer has been used to measure and analyse the settleability ofmicro-crystal muscovite and its modified products in epoxy resin for three months. The resultsshow that for micro-crystal muscovite of the same particle size, the settleability of micro-crystalmuscovite modified by coupling agents in epoxy resin is better than that of micro-crystalmuscovite; for micro-crystal muscovite modified by different coupling agents, the settleability ofmicro-crystal muscovite modified by coupling agent 3# in epoxy resin is the best; formicro-crystal muscovite of different particle sizes modified by coupling agent 3#, the settleabilityof 800 mesh micro-crystal muscovite in epoxy resin is the best which shows that the settleabilityin epoxy resin is better, the particle size of micro-crystal muscovite is smaller.(3) The three electrode system has been used to test the electrical properties of micro-crystalmuscovite insulating pouring sealant; the scanning electron microscope has been used to test themicro-structure of micro-crystal muscovite insulating pouring sealant; IR has been used to test thebonding state of micro-crystal muscovite in insulating pouring sealant. The results show thatinsulating pouring sealants made of micro-crystal muscovite modified by different coupling agentshave excellent insulation properties; micro-crystal muscovite modified by coupling agents hasbeen dispersed more evenly in insulating pouring sealant and it has a closer association with epoxyresin; IR test can not show effectively whether chemical bond has formed between coupling agentand organic matrix and the intensity of absorption maximum has changed possibly because ofcoupling agent.