Bio-based straw composite plastic and preparation method thereof

Abstract

The invention discloses a bio-based straw composite plastic and a preparation method thereof. The plastic comprises the following raw materials: 30-60% of a polyolefin, 30-55% of straw powder, 1% of acompatibilizer, 5-15% of an additive, and 1-5% of a nano rigid organic material, wherein the compatibilizer is one or more of polyethylene glycol, a silane coupling agent, aluminum titanate and titanate; the additive is one or more of a plasticizer, a heat stabilizer and an inner lubricant; and the nano rigid organic material is a cellulose nanocrystal or a cellulose nanofibril. The preparation method comprises the following steps: preparing an ethanol solution from the compatibilizer, uniformly spraying the obtained solution into a mixture of the straw powder and the nano rigid organic material, performing placement at room temperature, performing drying, adding the remaining raw materials, performing uniform mixing under stirring, adding the mixed material into a twin-screw extruder, performing mixing and performing granulation. The plastic provided by the invention has better mechanical properties than a traditional straw composite plastic, and a part of raw materials are from natural renewable substances and have certain degradation properties.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a bio-based straw composite plastic and a preparation method thereof. Background technique [0002] With the rapid development of social economy and the shortage of oil resources, the impact of greenhouse gas emissions on the global climate has increasingly become the focus of worldwide attention. Therefore, reducing the use of petroleum resources and reducing carbon emissions have become the goal of everyone's joint efforts. [0003] Rice straw is a grassy plant, the most important agricultural by-product in the world, and it is also the most valuable agricultural product in the world (2011 global economic benefit of US$187 billion). For a long time, crop stalks have been mainly used as fertilizer, fuel, feed and papermaking raw materials, with a utilization rate of less than 50%. Most of the remaining straw is burned, causing serious smog and other air pollution. [0004] ...

AI Technical Summary

Problems solved by technology

[0005] However, due to the limited modification effect on straw in the preparation process of straw bio-based plastics in the prior art, the bio-based plastics produced still have a large gap with traditional plastics in terms of mechanical properties, and cannot meet the requirements of daily use.

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