Preparation method of polylactic acid based ramie reinforcing material

Abstract

The invention discloses a preparation method of a polylactic acid based ramie reinforcing material, and belongs to the field of material preparation. The preparation method is characterized by comprising the following steps: after mixing ramie with polylactic acid fiber, putting the mixture on a small combing machine to be combed into preformed pieces, and combing twice for each part; when a composite material is prepared, vertically overlapping and piling the preformed pieces, putting the preformed pieces into a mold, firstly carrying out preheating without pressure intensity on a preheatingsample, then carrying out hot-pressing recombination according to the plate mold temperature, pressure intensity and time, and finally cooling at a room temperature environment to obtain the compositematerial. An unmodified ramie reinforced polylactic acid composite material and a ramie reinforced polylactic acid composite material through alkali liquor treatment modification are prepared by using a compression molding technology respectively, and the interfacial compatibility between ramie and polylactic acid is effectively improved through the ramie reinforced composite material obtained through alkali treatment. Through alkali liquor treatment, the defect of a composite material interface layer is effectively improved.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a preparation method of a polylactic acid-based ramie reinforcing material. Background technique [0002] Fiber-reinforced polymer-based composites started with cellulose fiber-reinforced phenolic resins in 1908, and glass fiber-reinforced unsaturated resin composites for everyday products, such as guitars, tennis rackets, and automobiles, appeared in the 1940s. The application of composite materials in these fields has enriched people's lives, but with the strengthening of ecological environmental awareness and the constraints of energy shortages, the further development of these products has been restricted. [0003] With the increasingly prominent problems of environmental pollution and shortage of petroleum resources, the research and application of degradable polymer materials independent of petroleum resources is imperative. Ramie fiber (RF) has many advanta...

AI Technical Summary

Problems solved by technology

After the production of polylactic acid, its research has always been a hot topic of bio-based polymer composites, but because polylactic acid has the disadvantages of brittleness and poor toughness, it is necessary to add reinforcements to alleviate or make up for the poor toughness. However, the more commonly used reinforcements have been using inorganic or petroleum-based reinforcing fibers. Although this solves the problem of polylactic acid itself, it poses a threat to the environment.