Microcrystalline cellulose and polycaprolactone reinforced starch-based full-biodegradable blending material and preparation method thereof

Abstract

The invention relates to a microcrystalline cellulose and polycaprolactone reinforced starch-based full-biodegradable blending material and a preparation method thereof. The microcrystalline cellulose and polycaprolactone reinforced starch-based full-biodegradable blending material comprises the following components in parts by weight: 100 (as a base number) of starch, 0.1-10 of microcrystalline cellulose, 1-100 of polycaprolactone, 0.1-10 of coupling agent, and 10-50 of glycerol. The preparation method comprises the steps: dispersing microcrystalline cellulose; refining the starch; drying polycaprolactone; evenly mixing microcrystalline cellulose and the refined starch; evenly mixing microcrystalline cellulose and the refined starch, polycaprolactone and the coupling agent; and pelletizing to obtain granules. The starch-based blending material reinforced by microcrystalline cellulose and polycaprolactone is tripled obviously in tensile strength, has excellent mechanical property and full-biodegradation property, is simple in raw materials, and convenient to prepare, and can be used for producing various materials and be widely applied in the field of degradable plastics.

Description

technical field [0001] The invention relates to a starch-based fully biodegradable blend material reinforced by microcrystalline cellulose and polycaprolactone and a preparation method thereof. Background technique [0002] In recent years, global environmental and resource issues have led to challenges for petroleum-based plastic materials, and degradable polymer materials have attracted much attention because of their degradability and no pollution to the environment. Among them, starch is an important class of natural polymers. It is widely used in the research of plastic materials because of its environmental friendliness, renewable, abundant sources, and cheap price. It has become a research hotspot in degradable plastics [Chiellini E ., Solaro R. Biodegradable polymeric materials. Advanced Materials, 1996, 8(4):305-313.]. However, the molecular structure characteristics of starch itself lead to the infeasibility of its direct molding processing, so it is necessary to ...

AI Technical Summary

Problems solved by technology

The blended materials of polycaprolactone and starch have been studied, but it is necessary to add a large amount of polycaprolactone to make the starch-based material achieve better mechanical properties, and the addition of a large amount of polycaprolactone will inevitably lead to starch Substantial increase in base material production costs

Although some other reinforcing agents used in starch-based materials can improve their mechanical properties【Vertuccio L., Gorrasi G., Sorrentino A., Vittoria V. Nano clay reinforced PCL / starch blends obtained by high energy ball milling. Carbohydrate Polymers, 2009 , 75(1):172-179.], but the cost is still high, and there are disadvantages such as complicated preparation process, poor mechanical properties, and difficult full degradation, which greatly limit the wide application of starch-based materials

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