Material Drying
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PAN solvent residue affecting carbonization
Fenómeno del problema
Residual solvent in PAN precursor volatilizes during carbonization, causing pores
Análisis de la causa
Insufficient water washing after coagulation; incomplete solvent volatilization during drying
Solución
Increase the number of water washing stages and temperature (stepwise heating water washing); extend drying time and increase temperature; test residual liquid content <0.1%
Conclusión clave
Solvent residue is an important source of carbon fiber defects
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