Biodegradable composite cable and preparation method thereof

Abstract

The invention relates to the field of composite materials and discloses a biodegradable composite cable. The polylactic acid composite material comprises the following components in parts by weight: 50-70 parts of polylactic acid, 15-25 parts of hemp fibers, 10-20 parts of nano cellulose, 1-5 parts of a soft toughening agent, 1-5 parts of a hard toughening agent, 1-5 parts of a coupling agent and1-5 parts of a cross-linking agent. The composite material has relatively good biodegradability, mechanical properties, brittleness, heat resistance and impact resistance. The preparation method comprises the following steps: drying polylactic acid, hemp fibers, nano cellulose, a soft toughening agent and a hard toughening agent; melting and mixing the dried soft toughening agent, hard tougheningagent, coupling agent and cross-linking agent, adding the mixture into a double-screw extruder, cooling the extruded material, mixing the cooled material with polylactic acid and China hemp fiber, continuously extruding and melting the mixture, shaping the mixture in a mold, and granulating the shaped product to obtain the biodegradable cable. The whole process of the method is progressive, the material temperature is uniform, and the stability is excellent; and the production has the advantages of high yield, low cost and high popularization speed, and the preparation efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a biodegradable composite cable and a preparation method thereof. Background technique [0002] The current research hotspots on wires or cables are basically low-smoke, halogen-free, flame-retardant and other characteristics, but there is little research on the environmental protection performance of wires or cables. And the soil environment will be seriously polluted after being discarded. Moreover, most degradable materials on the market begin to become thinner, their toughness and strength decrease after being exposed to the general environment for 3 months, and gradually break into pieces. If these fragments are buried in garbage or soil, the degradation effect is not obvious. [0003] In order to reduce soil pollution after long-term use of wire or cable materials, it is necessary to develop a biodegradable cable material. Contents of the invention [0004]...

AI Technical Summary

Problems solved by technology

[0002] The current research hotspots on wires or cables are basically low-smoke, halogen-free, flame-retardant and other characteristics, but there is little research on the environmental protection performance of wires or cables. After being discarded, it will seriously pollute the soil environment

Moreover, most of the degradable materials on the market begin to become thinner, their toughness and strength decrease after being exposed to the general environment for 3 months, and gradually break into pieces

If these fragments are buried in garbage or soil, the degradation effect is not obvious

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