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High-toughness full-degradable composite material

A composite material, fully degradable technology, applied in the field of high toughness fully degradable composite material and its preparation, can solve the problems of poor compatibility of matrix resin, strong hydrophilicity of plant fiber, etc., to expand the scope of application and improve the interface compatibility and the effect of interfacial adhesion

Inactive Publication Date: 2020-01-07
佰信(福建)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In order to overcome the deficiencies in the prior art, the present invention provides a modified plant fiber and a method thereof to obtain a modified plant fiber with hydrophobicity and good interfacial compatibility with the matrix resin, through which the modified plant fiber The strengthening and toughening effect of bio-based polymers provides a high-toughness fully degradable composite material, which solves the technical problems of strong hydrophilicity of existing plant fibers and poor compatibility with bio-based polymer matrix resins

Method used

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  • High-toughness full-degradable composite material

Examples

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Effect test

Embodiment 1

[0052] The composite material of the present embodiment is prepared by blending and preparing the following components in parts by weight: 100 parts of PLA; 10 parts of hydrophobic flax fiber; 1 part of polycaprolactone grafted maleic anhydride; 2 parts of stearic acid, and Prepare by following steps:

[0053] First, put the hydrophobic flax fiber, polycaprolactone grafted maleic anhydride, stearic acid into the low-speed mixer according to the proportion and mix for 2 minutes, then put the dried PLA into the low-speed mixer and mix for at least 3 minutes, among which the low-speed The rotating speed of mixer is 90-120 rev / min, obtains mixed material.

[0054] Secondly, put the mixture into a twin-screw extruder, set the extrusion temperature at 160-190°C, melt extrude and granulate to obtain slices of high-toughness fully degradable composite material.

[0055] The hydrophobic modification process of the hydrophobic flax fiber of the present embodiment comprises the steps: ...

Embodiment 2

[0062] The composite material of this embodiment is prepared by blending and preparing the following components by weight: 100 parts of PLA; 50 parts of modified palm fiber; 6 parts of polylactic acid grafted maleic anhydride; 3 parts of stearic acid, 1 part of KH570 . Among them, the modified palm fiber is obtained by sequentially hydrophobically modifying and coupling modifying the palm fiber, and then referring to the preparation process of the embodiment to obtain slices of high-toughness fully degradable composite materials.

[0063] Among them, the difference between the hydrophobic modification of the palm fiber in this example and Example 1 is that in this example, 30% KOH solution is used to weigh Na 2 SiO 3 , and configure a mass concentration of 30% Na 2 SiO 3 Solution, other is identical with embodiment 1, obtains hydrophobically modified palm fiber.

[0064] Wherein, the coupling modification process of the hydrophobically modified palm fiber of the present em...

Embodiment 3

[0069] The composite material of this embodiment is mainly prepared by blending and preparing the following components in parts by weight: 75 parts of PLA, 15 parts of PBAT, 10 parts of PCL, 30 parts of modified sisal fiber; 4 parts of polylactic acid grafted maleic anhydride ; 2 parts of stearic acid, 1 part of KH5701. Wherein, the modified sisal fiber is obtained by successively hydrophobic modification and coupling modification of the sisal fiber. The preparation process of this embodiment is the same as that of Embodiment 2.

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Abstract

The invention provides a high-toughness full-degradable composite material, which is mainly prepared by blending the following components in parts by weight: 100 parts of biodegradable matrix resin; 1-60 parts of modified bio-based fiber; 1-8 parts of a compatilizer; 1-5 parts of a lubricant and 0-5 parts of a coupling agent; wherein the biodegradable matrix resin is one or a composition of more than two of PBAT, PCL, PLA, PBS, PBSA, PPC, PBST, PHB, PHA, PVA and PHBV, wherein the modified bio-based fiber comprises hydrophobic modification of the bio-based fiber or / and coupling modification ofthe bio-based fiber, the bio-based fiber is fibrilia, and the fibrilia is one or more of hemp fiber, flax fiber, sisal fiber and palm fiber. The modified plant fiber disclosed by the invention has a remarkable reinforcing and toughening effect on the bio-based matrix resin, and the interface compatibility and the interface bonding force of the modified plant fiber and the bio-based matrix resin are improved.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a high-toughness fully degradable composite material and a preparation method thereof. [0002] technical background [0003] Plastic packaging materials are mainly made of polyethylene, polyester or polypropylene. The plastic containers that are blown, extruded or injection molded through plastic molds have the main advantages of corrosion resistance, low cost, easy to carry and diverse shapes. It plays an important role in packaging liquid foods such as soy sauce, vinegar, alcohol, non-carbonated beverages, and milk. [0004] However, most of the plastic packaging materials currently used in the market cannot be degraded in the natural environment, which brings convenience to human life, but also brings increasingly serious environmental pollution problems. Due to its good corrosion resistance, some waste plastic packaging materials that cannot b...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08L51/08C08L67/02C08K5/09C08K3/34
CPCC08L67/04C08L2201/06C08L2205/025C08L2205/03C08L2205/035C08L2205/16C08L97/02C08L51/08C08K5/09C08L67/02C08K3/34
Inventor 林新华
Owner 佰信(福建)新材料科技有限公司
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