Completely-degradable bamboo-plastic composite material with super-high toughness and preparation method thereof

A completely degradable, ultra-high toughness technology, applied in the field of fully degradable bamboo-plastic composite materials and its preparation, can solve the problems of damaging the degradation performance of bamboo-plastic composite materials, and achieve long-term use safety, strong interface bonding, and compatibility good sex effect

Active Publication Date: 2013-03-20
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of these toughening agents will seriously damage the degradation performance of bamboo-plastic composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 34.5 parts of PLA, 40 parts of superfine bamboo powder, 5 parts of polylactic acid grafted oxazoline, 0.5 parts of antioxidant 245, 2 parts of oleic acid amide, 1 part of n-hexyl stearate, 1 part of phthalocyanine by weight parts 2 pieces of blue. Put the weighed raw materials into the SHR series high-speed mixer for dry mixing for 5 minutes, and the spindle speed is 300 rpm; then add the mixed materials into the feeding hopper of the twin-screw extruder, and use a forced feeder to feed the flax fiber. Add it to the extruder, control the fiber content to 15 parts, and then melt extrusion and granulation to form a composite material. Among them, the temperature settings of each heating zone of the screw are: the temperature of the first zone: 150°C; the second zone: 175°C; the third zone: 175°C; the fourth zone: 175°C; the head: 179°C; the material stays in the extruder The time was 2min, and the pressure was 20.8MPa.

Embodiment 2

[0036] Weigh 27.5 parts of PLA, 40 parts of superfine bamboo powder, 5 parts of polylactic acid grafted oxazoline, 0.5 parts of antioxidant 245, 2 parts of oleic acid amide, 1 part of n-hexyl stearate, phthalocyanine by parts by weight 2 pieces of blue. Put the weighed raw materials into the SHR series high-speed mixer for dry mixing for 5 minutes, and the spindle speed is 900 rpm; then add the mixed materials into the feeding hopper of the twin-screw extruder, and use a forced feeder to feed the flax fiber. Add it to the extruder, control the fiber content to 22 parts, and then melt extrusion and granulation to form a composite material. Among them, the temperature settings of each heating zone of the screw are: the temperature of the first zone: 150 °C; the second zone: 175 °C; the third zone: 175 °C; the fourth zone: 175 °C; The time was 3min, and the pressure was 24.7MPa.

Embodiment 3

[0038] Weigh by weight 34.5 parts of PBS, 40 parts of superfine bamboo powder, 5 parts of polylactic acid grafted oxazoline, 0.5 parts of antioxidant 245, 2 parts of oleic acid amide, 1 part of n-hexyl stearate, phthalocyanine 2 pieces of blue. Put the weighed raw materials into the SHR series high-speed mixer for dry mixing for 5 minutes, and the spindle speed is 600 rpm; then add the mixed materials into the feeding hopper of the twin-screw extruder, and use a forced feeder to feed the flax fiber. Add it to the extruder, control the fiber content to 15 parts, and then melt extrusion and granulation to form a composite material. Among them, the temperature settings of each heating zone of the screw are: the temperature of the first zone: 170°C; the second zone: 230°C; the third zone: 235°C; the fourth zone: 235°C; the head: 240°C; the material stays in the extruder The time was 2.5min, and the pressure was 22.1MPa.

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Abstract

The invention discloses a completely-degradable bamboo-plastic composite material with super-high toughness and a preparation method of the completely-degradable bamboo-plastic composite material. The completely-degradable bamboo-plastic composite material comprises the following components by weight: 20 to 60 parts of degradable plastic, 30 to 50 parts of superfine bamboo powder, 10 to 30 parts of natural plant fiber, 3 to 7 parts of compatilizer, 0.1 to 0.6 part of antioxidant, and 1 to 6 parts of lubricant. The preparation method comprises the following steps: blending all the raw materials except the natural plant fiber in a dry way; feeding the mixed raw materials into a twin-screw extruder; feeding the natural plant fibers into the extruder through a forcible feeder; melting and extruding; and pelleting to obtain the composite material. Compared with the commonly-marketed bamboo-plastic composite material, the bamboo-plastic composite material disclosed by the invention has the advantages that the impact toughness is improved by 5 to 10 times, and the bamboo-plastic composite material can be completely degraded within one year under soil burial condition and cannot be automatically degraded under natural use condition, so that the safety in long-term use can be ensured; and the melt index can reach 5 to 10g/10min, so that the injection molding can be adopted for forming.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a fully degradable bamboo-plastic composite material with ultra-high toughness and a preparation method thereof. Background technique [0002] my country is rich in bamboo resources. Bamboo has the advantages of extremely fast growth, easy formation and high strength. In order to develop bamboo resources, bamboo-plastic composite materials have been rapidly developed in recent years. [0003] The so-called bamboo-plastic composite material is a new type of composite material that is made of bamboo powder or bamboo fiber and plastic as the main raw materials, and is fully mixed in a molten state. Bamboo-plastic composite material has the beauty of natural bamboo, corrosion resistance, moth-eaten, good dimensional stability, no fading, easy to cut and drill, make full use of natural waste, and be conducive to environmental protection. Bamboo-plastic composite materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L67/04C08L67/02C08L69/00C08L51/08B29C47/92B29C48/92
CPCB29C48/40B29C48/92B29C2948/92514B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 张世杰程丽华王平童汉清杨鑫莉
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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