Low-shrinkage antibacterial modified polypropylene composite material and preparation method thereof

Abstract

The invention discloses a low-shrinkage antibacterial modified polypropylene composite material and a preparation method thereof. The low-shrinkage antibacterial modified polypropylene composite material consists of the following raw materials in percentage by weight: 80 to 93.9 percent of polypropylene, 5 to 15 percent of zinc oxide whiskers, 1 to 3 percent of a compatilizer, 0.1 to 2 percent of an antioxidant and 0 to 3 percent of other auxiliaries. According to the invention, by utilizing the special stereoscopic tetrapod-shaped structure of the tetrapod-shaped zinc oxide whiskers, the low-shrinkage antibacterial modified polypropylene composite material is enabled to take the full isotropic strengthening and modifying effects, and mechanical property and size uniformity of a material and a product and tip nano activity are ensured; besides, the semiconductor characteristic of non-strict chemical proportion of the low-shrinkage antibacterial modified polypropylene composite material enables the low-shrinkage antibacterial modified polypropylene composite material to have an effect of releasing active oxygen, which is macroscopically shown as high-efficiency, broad-spectrum, durable antibacterial and environment purification effects. The tetrapod-shaped zinc oxide whiskers are added into the polypropylene, so that the prepared modified polypropylene material has low shrinkage and high size stability, and further has the antibacterial purification performance. The low-shrinkage antibacterial modified polypropylene composite material can be used for making automobile parts with a high requirement on the size of a product.

Description

technical field [0001] The invention relates to a low-shrinkage, antibacterial modified polypropylene composite material and a preparation method thereof. It is a modified polypropylene material with simple process and good comprehensive performance, and can be used to prepare products with high requirements for stable dimensions and antibacterial properties. . Background technique [0002] Polypropylene is one of the five general-purpose plastics. Due to its rich source of raw materials, low price, easy processing and excellent overall performance, it has a wide range of uses and has become the fastest-growing variety of general-purpose resins. It is widely used in automotive interior and exterior decoration of products. However, an obvious disadvantage of polypropylene is that the molding shrinkage is relatively large, the creep resistance is poor, and the dimensional stability of the product is poor. However, when applied to automotive interiors such as dashboards and d...

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