Toughened biomass material and preparation method thereof

A biomass material and toughening technology, applied in the field of polyhydroxyalkanoate and its preparation, can solve problems such as the degree of performance improvement that is not mentioned, and achieve the effects of good application prospects, excellent mechanical properties, and simple process

Active Publication Date: 2013-07-17
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 201110234367.6 applied for the use of a mixture of bamboo fiber and polyhydroxybutyrate copolyester and its preparation method. Although the method is simple and easy, the production efficiency is high, the cost is low, and the product is non-polluting, it does not mention compliance with The degree of material performance improvement
Therefore, there are no reports on the reactive blending of maleic anhydride grafted polypropylene (MPP) with PHA-based polymers to improve material toughness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing a toughened biomass material, comprising the following steps:

[0036] (1) Graft maleic anhydride on the polypropylene macromolecular chain;

[0037] (2) Grinding the maleic anhydride graft MPP of polypropylene into powder;

[0038] (3) Mechanically mix the PHBV powder with the powder of the maleic anhydride graft MPP of polypropylene at a ratio of 99:1;

[0039] (4) Melt and blend the mixture obtained in the previous step using a screw extruder or an internal mixer to obtain a PHBV / MPP blend material with an elongation at break of 600%; the process parameters are:

[0040] The processing temperature of the screw extruder is: zone 1: 10°C, zone 2: 155°C, zone 3: 160°C, zone 4: 168°C, zone 5: 170°C, zone 6: 170°C, zone 7: 173°C , Zone 8: 175°C, Zone 9: 174°C, Zone 10: 172°C; the screw speed is 70rpm;

[0041] The processing temperature of the internal mixer is 160° C., the rotor speed is 70 rpm, and the internal mixing time is 10 minutes.

[00...

Embodiment 2

[0049] A method for preparing a toughened biomass material, comprising the following steps:

[0050] (1) Graft maleic anhydride on the polypropylene macromolecular chain;

[0051] (2) Grinding the maleic anhydride graft MPP of polypropylene into powder;

[0052] (3) Mechanically mix the PHB powder with the powder of the maleic anhydride graft MPP of polypropylene at a ratio of 50:50;

[0053] (4) Melt and blend the mixture obtained in the previous step using a screw extruder or an internal mixer to obtain a PHB / MPP blend material with an elongation at break of 620%; the process parameters are:

[0054] The processing temperature of the screw extruder is: Zone 1: 30°C, Zone 2: 172°C, Zone 3: 175°C, Zone 4: 175°C, Zone 5: 178°C, Zone 6: 178°C, Zone 7: 180°C , Zone 8: 183°C, Zone 9: 182°C, Zone 10: 175°C; the screw speed is 30rpm;

[0055] The processing temperature of the internal mixer is 200° C., the rotor speed is 30 rpm, and the internal mixing time is 4 minutes.

[0056...

Embodiment 3

[0062] A method for preparing a toughened biomass material, comprising the following steps:

[0063] (1) Graft maleic anhydride on the polypropylene macromolecular chain;

[0064] (2) Grinding the maleic anhydride graft MPP of polypropylene into powder;

[0065] (3) Mechanically mix the PHBV powder with the powder of the maleic anhydride graft MPP of polypropylene at a ratio of 95:5;

[0066] (4) Melt and blend the mixture obtained in the previous step using a screw extruder or an internal mixer to obtain a PHBV / MPP blend material with an elongation at break of 640%; the process parameters are:

[0067] The processing temperature of the screw extruder is: Zone 1: 15°C, Zone 2: 160°C, Zone 3: 165°C, Zone 4: 170°C, Zone 5: 172°C, Zone 6: 172°C, Zone 7: 174°C , Zone 8: 176°C, Zone 9: 176°C, Zone 10: 173°C; the screw speed is 60rpm;

[0068] The processing temperature of the internal mixer is 170° C., the rotor speed is 40 rpm, and the internal mixing time is 8 minutes.

[006...

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Abstract

The invention relates to a toughened biomass material and a preparation method thereof. The toughened biomass material is a polyhydroxyalkanoate polymer (PHB)/ methyl-piperidino-pyrazole (MPP) or polyhydroxylbutyrate valerate (PHBV)/MPP blend material which is prepared by the steps of mixing PHB or PHBV and maleic anhydride graft polymer MPP of polypropylene according to the mass ratio of (99 to 50) to (1 to 50), fusing and blending; and the elongation at break of the PHB/MPP or PHBV/MPP blend material is 600%-650%. The preparation method comprises the steps of grafting maleic anhydride onto polypropylene, carrying out reactive blending with polyhydroxyalkanoate polymer PHB or PHBV, wherein the processing temperature is 160-200 DEG C; the rotating speed is 30-70rpm; and the time is 4-10 minutes; and preparing high-toughness PHA biodegradable plastic in fusing and blending manners. The toughened biomass material is simple in processing method, low in production cost, and very suitable for industrial production; and the prepared PHA biodegradable plastic is high in elongation at break and has great developing potential and excellent application prospect.

Description

technical field [0001] The invention relates to a toughened biomass material and a preparation method thereof, in particular to a biomass material modified with a maleic anhydride graft of polypropylene and a preparation method thereof, in particular to a maleic anhydride graft of polypropylene Polyhydroxyalkanoate modified by acid anhydride graft and its preparation method. Background technique [0002] High polymers with hydroxyalkanoic acid as the basic unit, generally known as polyhydroxyalkanoate (PHA), as energy storage substances for microorganisms, can be synthesized when carbon sources are abundant in the biological environment, and decomposed when needed , will be completely degraded into water and carbon dioxide in the ecological environment. Since PHA has the same thermoplasticity as general-purpose polymers and is biodegradable in the environment, it is valued as an environmentally friendly material. [0003] Among the PHA polymers, polyhydroxybutyrate (PHB) a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L51/06B29C47/92B29B7/28B29C48/92
Inventor 陈龙徐珺秦宗益
Owner DONGHUA UNIV
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