A high heat-resistant polylactic acid imitation wood composite material and its preparation method

Abstract

The invention discloses a high-heat-resistant polylactic-acid wood-like composite material and a preparation method thereof. The material contains the following ingredients in parts by weight: 60-90 parts of polylactic acid, 5-20 parts of starch, 1-10 parts of straws, 1-5 parts of epoxy vegetable oil, 0.1-3 parts of coupling agent, 0.5-3 parts of nucleating agent and 0.1-2 parts of antioxidant. The preparation method of the material comprises the following steps: (1) carrying out high-speed stirring; (2) carrying out extrusion granulating; (3) carrying out baking and detection. The invention belongs to the field of biodegradable macromolecular composite materials, and particularly, the advantages of synthetic wood and polylactic acid are merged and improved. According to the high-heat-resistant polylactic-acid wood-like composite material and the preparation method thereof, provided by the invention, the process is simple, the cost is low, the material is safe and environmentally friendly, and the mechanical properties are excellent.

Description

technical field [0001] The invention belongs to the field of biodegradable polymer composite materials, and specifically refers to a high heat-resistant polylactic acid imitation wood composite material and a preparation method thereof. Background technique [0002] Imitation wood is a kind of craft technology. Using this technology, products that look similar to solid wood can be constructed. The visual effects of imitation wood and solid wood products are comparable, and the fake wood can be confused with the real one. Sun-dried imitation wood will not corrode and fade, let alone insects. It is environmentally friendly and solves the dilemma of wood shortage. Imitation wood is an excellent substitute for traditional plastic and wood. Nowadays, China's wood resources are extremely scarce and environmental problems are becoming more and more serious. Grim, imitation wood products have a bright future. [0003] Polymer composite materials have good functionality and practica...

AI Technical Summary

Problems solved by technology

[0004] The existing patent CN102181165B discloses a production method and product of a straw imitation wood material. Firstly, the raw material and the straw are mixed evenly through a high mixer, and then extruded and granulated through a twin-screw extruder, and the particles are sent into a conical double The screw extruder is water-cooled to make the required profile. This product is environmentally friendly and non-toxic, but the application range of the material is narrow, and it is not suitable for the production of daily necessities such as heat-resistant injection molding tableware and cups; there is also a patent CN103554949B that discloses a Straw tableware and its production method, using straw powder, adhesives, fillers, additives, water, etc., are fully mixed and then hot-pressed to produce straw tableware. Heat resistance, but the production process and method are relatively complex, low production efficiency and not flexible enough