The application discloses a kind of
flame retardant,
flame-retardant
Lyocell fiber and its preparation method and application.The
flame retardant compound of the application has the structure as shown in formula I: Wherein, R1 is selected from-OCH3, -OCH2CH3, -OCH2CH2CH3, R2 is selected from-NHCH2COOH, -NHCH2CH2COOH, complex flame retardant includes the flame-retardant compound and inorganic flame-retardant auxiliary agent;The inorganic flame-retardant auxiliary agent is
graphene or
graphene derivative.The flame retardant compound of the application contains flame-retardant elements
phosphorus and
nitrogen, and contains carboxyl structure, can be combined with the hydroxyl on
cellulose, can improve the firmness of combination with
fiber, and has good flame retardancy, can form complex flame retardant
system with inorganic flame-retardant auxiliary agent, is added into
fiber spinning dope to prepare flame-retardant
Lyocell fiber, and flame-retardant performance is excellent, good durability, while flame-retardant agent is less in amount, need not add emulsifying agent, dispersing agent and other auxiliary agents, and
spinning process is green and environment-friendly.