Preparation method of lignin flame retardant and preparation method of full-biomass flame-retardant plastic

The invention provides a preparation method of a lignin flame retardant and a preparation method of full-biomass flame-retardant plastic. According to the method for preparing the lignin flame retardant, the lignin flame retardant is prepared by using the byproduct lignin of the pulping and papermaking industry, phytate and tannic acid as raw materials; the prepared lignin flame retardant not only has good flame retardant property, but also can be biodegraded, and has less environmental pollution compared with the traditional flame retardant; meanwhile, according to the method for preparing the lignin flame retardant, the industrial by-product lignin can be well utilized, waste of the lignin by-product is avoided, and the method has important economic value. 本发明提供了一种木质素阻燃剂的制备方法、全生物质阻燃塑料的制备方法。本发明的木质素阻燃剂的方法，利用制浆造纸工业的副产物木质素、以及植酸盐、单宁酸为原料制备得到木质素阻燃剂；制备得到的木质素阻燃剂不仅具有良好的阻燃性能，同时还可以生物降解，相比传统阻燃剂带来的环境污染少；同时，本申请的木质素阻燃剂的方法，可以对工业副产物木质素进行很好的利用，避免木质素副产品浪费，具有重要的经济价值。