静电纺丝技术制备ETPE基多元含能复合纤维OA北大核心CSTPCD

In order to explore the electrostatic spinning process for the preparation of ETPE-based multicomponent energetic composite fibers,the GAP-ETPE-based ultrafine energetic composite fibers were prepared by electrospinning technique using poly(glycidyl azide ether)thermoplastic elastomer(GAP-ETPE)as the polymer binder and CL-20 and nano aluminum powder(n-Al)as the high-energy components,and the key process parameters such as solvent,mass fraction of precursor and solid phase composition ratio were optimized.The product morphology was characterized by scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The thermal decomposition behavior of the composite fibers were analyzed by DSC method.The mechanical sensitivities of the composite fibers were tested.The results show that the best solvent for the preparation of GAP-ETPE-based energetic composite fiber electrospinning is acetone,where the products are uniform with smooth surface.The binary ultrafine energetic composite fibers(CLx-ETPEy-Z)have the best filament formation with an aver-age diameter of about 2 480nm when the mass ratio of GAP ETPE/CL-20 is 3∶7 and the mass fraction of precursor solution is 50％.When the ternary ultrafine energetic composite fiber of the mass fraction of aluminum powder is 10％and the concen-tration of precursor solution is 50％,the filament formation is optimal with an average diameter of about 930 nm.Compared with CL-20,the peak thermal decomposition temperature of CL7-ETPE3-50 energetic composite fiber is advanced by 29 ℃.Al-so,the peak thermal decomposition temperature is advanced by 32 ℃ with the addition of n-Al,which is better than the Physi-cal Co-Mixes(PM).The frictional sensitivities of GAP-ETPE/CL-20 and GAP-ETPE/CL-20/Al energetic composite fibers are 32％and 48％,respectively,and the impact sensitivities are 29cm and 43cm,respectively.Compared with CL-20 sensitivi-ties(P=100％,H50=17 cm),the mechanical sensitivites of the two energetic composite fibers are siganificantly decreased.Both the frictional and impact sensitivities are lower than those of the physical blends of the same formulation.