This invention belongs to the field of
flame retardant technology, specifically relating to a coated
boron nitride and its preparation method and application, and a biodegradable
flame-retardant
composite material and its preparation method and application. This invention employs a multi-
level structure regulation approach, utilizing
silane coupling agents and chemical bonding for
surface coating modification, effectively alleviating
stress concentration. Furthermore, regular polyhedral
flame-retardant units are constructed on the coated and modified two-dimensional
boron nitride surface, building a three-dimensional flame-retardant network. Through
phytic acid molecular bridging, an inorganic-
organic interface transition layer is formed, significantly improving the
interfacial adhesion strength between the functional phase and the matrix resin. This invention constructs a flame-retardant
structural system based on
molecular configuration optimization, optimizing the interfacial compatibility between the functional phase and the biodegradable matrix resin. It utilizes a bio-based
phosphorus-
nitrogen synergistic flame-retardant
system combined with a two-dimensional
boron nitride structure for composite design, constructing a flame-retardant network
system with both high-efficiency flame-retardant properties and excellent performance.