阅读说明：本技术 一种高填充淀粉母粒及其制备方法 (High-filling starch masterbatch and preparation method thereof ) 是由 曾广胜 江太君 陈一 孟聪 胡灿 尹琛 刘水长 于 2019-12-10 设计创作，主要内容包括：本发明公开了一种高填充淀粉母粒及其制备方法,本发明采用未改性原淀粉为主要原料,添加高效增塑剂与润滑剂对复合材料进行增塑与润滑,制备出颗粒均匀表面光滑的高填充淀粉复合材料母粒。所述淀粉母粒可以广泛应用于同类基体树脂的填充,适应于挤出、注塑、吹膜与吹塑等多种成型工艺,材料成本相对于纯基体树脂更低,能够有效降低复合材料的成本,同时可以提升复合材料的生物碳含量,降低制品的碳足迹。(The invention discloses a high-filling starch master batch and a preparation method thereof. The starch master batch can be widely applied to filling of matrix resin of the same kind, is suitable for various molding processes such as extrusion, injection molding, film blowing, blow molding and the like, has lower material cost compared with pure matrix resin, can effectively reduce the cost of the composite material, and can simultaneously improve the biological carbon content of the composite material and reduce the carbon footprint of a product.)

1. The high-filling starch masterbatch is characterized by comprising, by weight, 50-70 parts of starch, 20-35 parts of polyolefin, 2-10 parts of a compatilizer, 1-8 parts of a lubricant and 0.2-1 part of an antioxidant.

2. The highly filled starch masterbatch according to claim 1, wherein the raw materials comprise, by weight, 60 parts of starch, 30 parts of polyolefin, 5 parts of compatibilizer, 5 parts of lubricant, and 0.5 part of antioxidant.

3. The highly filled starch concentrate of claim 1 or 2, wherein the starch is one or more of corn starch, tapioca starch, wheat starch and potato starch.

4. The highly filled starch masterbatch according to claim 1 or 2, wherein the starch has a moisture content of 5-7%.

5. The highly filled starch concentrate of claim 1 or 2, wherein the polyolefin is at least one of polyethylene and polypropylene.

6. The highly filled starch masterbatch according to claim 1 or 2, wherein the compatibilizer is at least one of EVA, EBA, and maleic anhydride grafted polyethylene wax.

7. The highly filled starch concentrate of claim 1 or 2, wherein the lubricant is at least one of EBS wax, polyethylene wax, calcium stearate, and zinc stearate.

8. The highly filled starch concentrate of claim 1 or 2, wherein the antioxidant is one or both of 1010 and 168.

9. The highly filled starch concentrate as claimed in any one of claims 1 to 8, wherein the preparation method comprises: mixing starch, plasticizer, lubricant and antioxidant at high speed according to a certain proportion until the temperature of the materials reaches 70-100 ℃, then placing the materials into a cold mixing cylinder to reduce the temperature to below 40 ℃, and extruding and granulating the cooled mixture to obtain the high-filling starch master batch.

Technical Field

The invention relates to the technical field of composite materials, and particularly relates to a high-filling starch masterbatch and a preparation method thereof.

Background

Starch is a renewable recyclable green material from natural plants, can be used as grain for human use, and is widely applied to the fields of chemical industry and new materials for preparing various composite materials. Due to the excellent biodegradability, starch is generally used as filling to prepare thermoplastic high-biochar-content bio-based composite materials, is widely applied to disposable products, and is more and more valued by people in the large environment that petrochemical resources are increasingly in shortage and white pollution is increasingly serious at present. On one hand, the starch can be prepared into thermoplastic starch through chemical modification, and then the thermoplastic starch is mixed with the traditional plastic material in a master batch mode to produce a plastic product. If starch can be filled into the traditional thermoplastic plastics in a high proportion, the composite material can obtain better processing performance under the action of the plasticizer and the lubricant, and the starch composite material master batch with the high filling proportion can be blended with the traditional plastic material to produce products. In addition, the processing technology does not involve chemical modification of direct starch, and the prepared thermoplastic starch master batch has high cost performance and also has better physical and mechanical properties.

Disclosure of Invention

The invention aims to solve the technical problem of providing a high-filling starch masterbatch and a preparation method thereof aiming at the defect of application of starch in plastics.

The purpose of the invention is realized by the following technical scheme:

the high-filling starch master batch comprises, by weight, 50-70 parts of starch, 20-35 parts of polyolefin, 2-10 parts of a compatilizer, 1-8 parts of a lubricant and 0.2-1 part of an antioxidant.

Preferably, the raw materials comprise 60 parts of starch, 30 parts of polyolefin, 5 parts of compatilizer, 5 parts of lubricant and 0.5 part of antioxidant.

Further, the starch is one or more of corn starch, tapioca starch, wheat starch and potato starch.

Further, the water content of the starch is 5-7%.

Further, the polyolefin is at least one of polyethylene and polypropylene.

Further, the compatilizer is at least one of EVA, EBA and maleic anhydride grafted polyethylene wax.

Further, the lubricant is at least one of EBS wax, polyethylene wax, calcium stearate and zinc stearate.

Further, the antioxidant is one or two of 1010 and 168.

The preparation method of the high-filling starch masterbatch comprises the following steps: mixing starch, plasticizer, lubricant and antioxidant at high speed according to a certain proportion until the temperature of the materials reaches 70-100 ℃, then placing the materials into a cold mixing cylinder to reduce the temperature to below 40 ℃, and extruding and granulating the cooled mixture to obtain the high-filling starch master batch.

Compared with the prior art, the beneficial effects are:

the invention adopts unmodified raw starch as a main raw material, and the composite material is plasticized and lubricated by comprehensively utilizing the efficient plasticizer and the lubricant to prepare the high-filling starch composite material master batch with uniform particles and smooth surface. The master batch can be widely applied to filling of matrix resin of the same kind, is suitable for various molding processes such as extrusion, injection molding, film blowing, blow molding and the like, has lower material cost compared with pure matrix resin, can effectively reduce the cost of the composite material, and can simultaneously improve the biological carbon content of the composite material and reduce the carbon footprint of a final product.

Detailed Description

The following examples are further explained and illustrated, but the present invention is not limited in any way by the specific examples. Unless otherwise indicated, the methods and equipment used in the examples are conventional in the art and all materials used are conventional commercially available materials.