The invention discloses a crosslinked
polyethylene reinforced high-strength insulating
aerial cable, and belongs to the technical field of crosslinked
polyethylene cable materials.The crosslinked
polyethylene reinforced high-strength insulating
aerial cable is prepared by the steps that hydroxyl is introduced to nano
boron nitride powder, then amino is grafted through KH-550, nano alpha-Al2O3
powder is modified through gamma-
glycidyl ether oxypropyl trimethoxy
silane, and the cross-linked polyethylene reinforced high-strength insulating
aerial cable is obtained; the preparation method comprises the following steps: preparing low-density polyethylene, compounding the low-density polyethylene with aminated nano
boron nitride powder to form nano composite powder, improving the
interface bonding force between the low-density polyethylene and the nano composite powder, carrying out
melt blending on the low-density polyethylene and the nano composite powder to improve the
dispersity of the nano composite powder in the low-density polyethylene, and carrying out nucleophilic acyl
substitution reaction to obtain a
fluorine-containing modified
monomer. The nano
boron nitride powder and the nano alpha-Al2O3 powder are subjected to a cross-linking reaction under the
initiation action of an initiator and then coat the exterior of the
thermal insulation layer, and the nano
boron nitride powder and the nano alpha-Al2O3 powder are bridged through
siloxane bonds to form a three-dimensional heat-conducting network, so that the
heat resistance of the outer insulating layer is improved.