Preparation method of all-fiber degradable composite material

Abstract

The invention discloses a preparation method of an all-fiber degradable composite material, which comprises the following steps: 1) raw material pretreatment: drying fiber solid waste, and pulverizing to obtain fiber solid waste powder; 2) high-speed mixing: uniformly mixing the fiber solid waste powder, an esterifying agent and a catalyst in a mixing machine to obtain a reactant mixture; 3) mechanical activation solid-phase reaction: adding the reactant mixture into a mechanical activation reactor to carry out solid-phase reaction, thereby obtaining an esterification modified fiber; 4) high-speed mixing: carrying out high-speed mixing on the esterification modified fiber and long fiber reinforcer to obtain a mixture; and 5) putting the mixture into a mold, and carrying out hot pressing on a flat vulcanizing machine under the conditions of certain temperature and pressure to prepare the all-fiber composite material. The solid-phase reaction is adopted to overcome the defect in the solvent process, and the mechanical activation reinforced solid-phase esterification is adopted to prepare the thermoplastic plant fiber, so that the method has the advantages of simple technique, no pollution, low cost and the like and is simple to operate.

Description

technical field [0001] The invention belongs to the field of preparation of degradable composite materials, in particular to a preparation method of full-fiber degradable composite materials. Background technique [0002] The existing reserves of non-renewable resources on the earth are very limited. With the rapid development of the plastic industry, the "white pollution" caused by plastic products has brought great harm to human production and living environment. In order to solve the shortage of raw materials and environmental problems, people gradually shift their attention to the renewable resources on the earth. Plant fiber material is a kind of natural polymer material and an inexhaustible resource. The potential advantages of plant fiber used in composite materials have attracted more and more attention. It is cheap, low density, and has a high elastic modulus, which is similar to inorganic fibers, and its biodegradability and renewability are the most prominent. T...

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the above-mentioned heterogeneous and homogeneous solvent esterification reactions that require a large amount of solvents, solvent recovery, environmental pollution, catalyst residues, complex processes and higher costs. The present invention uses solid-phase esterification to apply Modification of natural plant fibers into thermoplastic materials

However, the solid-phase reaction has defects such as insufficient mixing and contact between materials, limited energy exchange between materials, and high energy consumption. At present, physical methods such as microwave, ultrasonic radiation, and grinding have been applied to accelerate the generalization of solid-phase starch and cellulose. However, the above-mentioned physical method has defects such as large energy consumption, slow esterification reaction speed, high cost, complicated operation, and inapplicability to the organic synthesis of plant fibers; the present invention uses mechanical activation to strengthen solid-phase esterification to prepare thermoplastic Plant fiber technology, this method has the advantages of low energy consumption, simple process, no pollution, easy operation, can quickly improve the speed and uniformity of plant fiber esterification reaction, etc.

Images