Biomass composite for toothbrush handle and preparation method of biomass composite

Abstract

The invention relates to the technical field of biodegradable high polymer materials, in particular to a biomass composite for a toothbrush handle and a preparation method of the biomass composite. The biomass composite mainly comprises the following raw materials: 50-65 parts of poly butylenes succinate, 20-40 parts of polylactic acid, 15-30 parts of modified starch, 10-20 parts of modified woodflour, 2-8 parts of nano talcum powder, 0.1-0.5 parts of compatilizer, 0.2-0.8 parts of antioxidant, 0.2-0.6 parts of lubricant and 0.8-1.5 parts of antibacterial agent. Through a synergistic effect of components, the toughness, plasticity, strength, antibacterial properties and degradability of the biomass composite are improved; and at the same time, the cost is greatly lowered, so that the large-scale production and application are facilitated.

Description

technical field [0001] The invention relates to the technical field of biodegradable polymer materials, in particular to a biomass composite material used for a toothbrush handle and a preparation method thereof. Background technique [0002] Toothbrush is one of the main utensils for daily oral cleaning. Toothbrush is used as a consumable product. my country consumes hundreds of millions of toothbrushes every year, and the world consumes billions of them every year. After the toothbrush is used for a period, it will be thrown away directly. The existing toothbrush handles on the market are made of polypropylene (PP), polyethylene (PE), polybutylene terephthalate ( PETG) and other petroleum-based plastic materials, 95% of used toothbrushes cannot be classified and utilized. Some toothbrush handles flow into the ocean with rainwater, and some are disposed of by burying or incinerating. The way of incineration will produce a lot of toxic by-products; the way of burying, the...

AI Technical Summary

Problems solved by technology

For example, Chinese patent CN102408690A discloses a thermoplastic starch-modified polylactic acid material, which forms a blend system of starch and polylactic acid through simple direct blending, but the starch and polylactic acid are incompatible, and the interfacial cohesion of the blend system is poor. The physical and mechanical properties such as toughness and plasticity of the product are reduced; Chinese patent CN101831155A discloses a method for preparing a starch / polylactic acid blend. application in food packaging and tableware; and for example, Chinese patent CN101781448A discloses a preparation method of a fully biodegradable reinforced polylactic acid / starch blend, which improves the blend by adding a thermoplastic elastic toughening agent. Mechanical and heat resistance properties, but the thermoplastic elastic toughening agent used is liquid rubber or thermoplastic elastomer, which is a non-biodegradable component, which affects the complete degradability of the blend

Therefore, the current starch-modified polylactic acid materials still have the following defects: (1) the heat-resistant temperature of the starch itself is limited, so that the starch will be carbonized and decomposed due to high temperature during processing; (2) starch and wood flour There are many hydroxyl groups on the surface and have strong polarity, while polylactic acid contains hydrophobic groups, and the compatibility of the two-phase interface is poor, resulting in poor physical and mechanical properties of the composite material such as toughness, strength, and plasticity.

However, the price of metal particles is expensive, resulting in high product cost, and the dispersion of metal particles in the thermoplastic elastomer material system is poor, which not only leads to the decline of antibacterial performance, but also reduces the mechanical strength.

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