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

A composite material and biodegradable technology, which is applied in the field of fully biodegradable composite materials and their preparation, can solve the problems of low tear strength of blend membrane materials, achieve low tear strength, increase tear strength, increase compatibility effect

Active 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

CN201310731579.4 discloses a PLA modified material. By adding PBAT to PLA and using a chain extender to compatibilize the polymer, the prepared material retains the high strength of PLA after being blown into a film. , high light transmittance and cost-effective characteristics, but also improved flexibility, but the tear strength of the blend film is still low

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

Examples

Experimental program
Comparison scheme
Effect test

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 biodegradable ...

Embodiment 1-8 and comparative example 1-6

[0058] Mix the inorganic filler fully biodegradable masterbatch obtained above with biodegradable copolyester, polylactic acid, and compatibilizer in a high-speed 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 , to obtain fully biodegradable composite materials with inorganic fillers. 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 fil...

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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 polylactic acid and 0.1-5 parts of a compatilizer, wherein the inorganic filler full-biodegradable masterbatches comprise the following components: 20-80 parts of the biodegradable copolyester, 20-80 parts of inorganic filler, 0.1-10 parts of a lubricating agent and 0.1-5 parts of the 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] Polylactic acid (PLA) is completely biodegradable and derived from renewable resources such as plants. Its performance is similar to that of general-purpose plastic polypropylene, such as high modulus, high tensile strength and good processability. However, the brittleness of polylactic acid is serious, and the notched impact strength is less than 3KJ / m 2 , which seriously limits its wide application, the method of multi-component blending modification to improve the toughness of polylactic acid is the main technical means at present. Biodegradable copolyester is a kind of aliphatic copolyester or aliphatic / aromatic copolyester, which has complete biodegradability, mainly including polybutylene succinate (PBS), poly(butylene adipate alcohol es...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L33/00C08K13/06C08K9/06C08K9/04C08K3/34C08K3/36C08K3/26C08K5/09C08J3/22
Inventor 熊凯焦建张新国王林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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