Full-biodegradable composite as well as preparation method and application of full-biodegradable composite

A composite material and biodegradation technology, which is applied in the field of fully biodegradable composite materials and their preparation, can solve the problems of poor compatibility between starch and biodegradable copolyester, poor tear strength, and impact on performance, so as to improve the tear Lower strength, improved tear strength, increased compatibility effects

Inactive Publication Date: 2015-04-01
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biodegradable copolyester starch blend materials have attracted widespread attention in the industry, but their processing and molding and products have the following problems: poor compatibility between starch and biodegradable copolyester, rough product surface, low mechanical properties, as a film or sheet When the material is used, the tear strength is poor, which seriously affects the performance
[0003] CN200810046032.X discloses a biodegradable thermoplastic starch plastic with high starch content. First, thermoplastic starch is made, and then thermoplastic starch is blended with resin and compatibilized It is mixed with other resins, and the fully biodegradable plastic with high starch content is produced through a twin-screw extruder, but the mechanical properties of the material are low, and the improvement of the tear strength of the base material is not mentioned.

Method used

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  • Full-biodegradable composite as well as preparation method and application of full-biodegradable composite
  • Full-biodegradable composite as well as preparation method and application of full-biodegradable composite

Examples

Experimental program
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preparation example Construction

[0050] Preparation of inorganic filler fully biodegradable masterbatch:

[0051] According to the ratio in Table 1, the biodegradable copolyester was first dried in an oven at 80°C for 5 hours; the dried biodegradable copolyester

[0052] Mechanically blend esters, inorganic fillers, lubricants, and compatibilizers in a high-speed mixer for 5 minutes; feed the homogeneously mixed materials in step (2) into a twin-screw extruder for melt plasticization, extrusion, and granulation That is, A1~A6, B1-B6 inorganic filler fully biodegradable masterbatches are obtained;

[0053] The twin-screw extruder is a co-rotating parallel twin-screw extruder, and its set temperature is: Zone 1: 60-90°C, Zone 2: 120-150°C, Zone 3: 140-170°C, Zone 4: 170~190℃, Zone 5: 170~190℃, Zone 6: 170~190℃,

[0054] Zone 7: 170~190℃, zone 8: 170~190℃, zone 9: 170~190℃, head: 170-190℃, screw speed: 300rpm. The screw aspect ratio is 40:1.

[0055] Table 1 A 1~A6, B1-B6 inorganic filler fully biodegradabl...

Embodiment 1-8 and comparative example 1-6

[0058] Mix the above-mentioned fully biodegradable masterbatch of inorganic filler with biodegradable copolyester, starch, and plasticizer in a high mixer at room temperature for 5 minutes according to the ratio in Table 2, and then add it to a twin-screw machine for extrusion blending and granulation. The inorganic filler fully biodegradable composite material was obtained. Put the composite material in an extrusion blown film machine, set the screw temperature at 120-160°C, and extrude and blow it into a film with a thickness of 12 microns. The mechanical properties of the film are shown in Table 2.

[0059] Table 2 The composition and performance results of each component of the embodiment and the comparative example

[0060]

[0061] From the comparison of Comparative Example 1 and Example 3, it can be seen that the addition of the lubricant can effectively prevent the agglomeration of the filler and make the filler have higher dispersibility, and the film product obtai...

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Abstract

The invention discloses a full-biodegradable composite as well as a preparation method and application of the full-biodegradable composite. The full-biodegradable composite comprises the following components: 5-40 parts of inorganic filler full-biodegradable masterbatches, 40-80 parts of biodegradable copolyester, 10-40 parts of starch and 5-20 parts of a plasticizer, wherein the inorganic filler full-biodegradable masterbatches comprise the following components: 20-80 parts of biodegradable copolyester, 20-80 parts of inorganic filler, 0.1-10 parts of a lubricating agent and 0.1-5 parts of a compatilizer; and the inorganic filler is one or a combination of modified kaolin, modified white carbon black and modified montmorillonite. According to the full-biodegradable composite, the modified montmorillonite, the modified kaolin or the modified white carbon black is added as an enhancer, and an epoxy acrylic copolymer is introduced as the compatilizer, so that the compatibility of inorganic filler and matrix resin is enhanced, and the uniform dispersion is achieved; and the masterbatches are added into the matrix resin, so that the problem of relatively low tearing strength of a blend film and a sheet can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a fully biodegradable composite material and its preparation method and application. Background technique [0002] Biodegradable copolyesters are a type of aliphatic copolyesters or aliphatic / aromatic copolyesters with complete biodegradability. Mainly including polybutylene succinate (PBS), poly(butylene adipate co-butylene terephthalate) (PBAT), and poly(butylene succinate co-p-hexyl Butylene Glycol Dioxide) (PBSA). It is used as a packaging material in engineering, and is involved in daily necessities, medical and agricultural applications. Compared with other degradable materials, it has lower cost and stable mechanical properties. Starch has become the most researched and developed type of biodegradable plastics at home and abroad because of its wide range of sources, various varieties, low cost and can be completely degraded in various natural enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08K13/06C08K9/06C08K9/04C08K3/34C08K3/36C08K3/26C08K5/09C08K5/098C08K5/053C08J3/22
Inventor 熊凯焦建钟宇科苑仁旭赵巍徐依斌曾详斌蔡彤旻夏世勇袁志敏
Owner KINGFA SCI & TECH CO LTD
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