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Lignin modified PHA biodegradable plastic and preparing method thereof

A biodegradable plastic and lignin technology, which is applied in the field of lignin-modified PHA biodegradable plastics and its preparation, can solve the problems of high-cost PHA, etc., and achieve the effects of convenient operation, cheap and easy-to-obtain raw materials, and simple preparation process

Inactive Publication Date: 2017-04-26
JINING MING SHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high cost has always limited the use of PHA in the market

Method used

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  • Lignin modified PHA biodegradable plastic and preparing method thereof
  • Lignin modified PHA biodegradable plastic and preparing method thereof
  • Lignin modified PHA biodegradable plastic and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 Preparation of lignin-modified PHA biodegradable plastics

[0032] (1) In terms of parts by weight, the proportioning ratio of each raw material used is as follows:

[0033]

[0034] (2) Concrete preparation method, comprising the following steps:

[0035] (1) Dry a certain amount of PHA and lignin powder (200 mesh) at 25°C and 0-5000Pa for 2.5h;

[0036] (2) Add dried PHA, lignin powder, 1,6-hexanediol, butyl hydroquinone, triethyl citrate, epoxidized soybean oil, calcium stearate into the high mixer to control the material The temperature is 100-105°C, mixed for 15 minutes, and the speed is 900r / min;

[0037] (3) Extruding and granulating the obtained mixed material through a twin-screw extruder, controlling the extrusion temperature to be 150-160° C. to obtain lignin-PHA composite plastic particles;

[0038] (4) The lignin-PHA composite plastic is blown into a film, and the injection molding temperature is controlled at 140-170° C. to prepare vario...

Embodiment 2

[0039] Embodiment 2 Preparation of lignin-modified PHA biodegradable plastics

[0040] (1) In terms of parts by weight, the proportioning ratio of each raw material used is as follows:

[0041]

[0042]

[0043] (2) Concrete preparation method, comprising the following steps:

[0044] (1) Dry a certain amount of PHA and lignin (200 mesh) at 25°C and 0-5000Pa for 3 hours;

[0045] (2) Add dry PHA, lignin, acetyl tri-n-butyl citrate, resorcinol dihydroxyethyl ether, butyl hydrodiphenol, epoxidized soybean oil, calcium stearate into the high mixer , control the material temperature to 110°C, mix for 20 minutes, and the speed is 1000r / min;

[0046] (3) extruding and granulating the obtained mixed material through a twin-screw extruder, controlling the extrusion temperature to be 160-170° C. to obtain lignin-PHA composite plastic particles;

[0047] (4) The lignin-PHA composite plastic is blown into a film, and the injection molding temperature is controlled at 150-160° C. t...

Embodiment 3

[0048] Example 3 Preparation of lignin-modified PHA biodegradable plastics

[0049] (1) In terms of parts by weight, the proportioning ratio of each raw material used is as follows:

[0050]

[0051] (2) Concrete preparation method, comprising the following steps:

[0052] (1) Dry a certain amount of PHA and lignin (200 mesh) at 25°C and 0-5000Pa for 3 hours;

[0053] (2) Add dried PHA, lignin, maleic anhydride, glycerol triacetate, butyl hydrodiphenol, 1,4-butanediol, zinc stearate into the high mixer to control the material temperature at 105°C, mix for 25 minutes, and the speed is 1000r / min;

[0054] (3) extruding and granulating the obtained mixed material through a twin-screw extruder, controlling the extrusion temperature to be 180-190° C. to obtain lignin-PHA composite plastic granules;

[0055] (4) The lignin-PHA composite plastic is blown into a film, and the injection molding temperature is controlled at 160-170° C. to prepare various lignin-modified PHA biodeg...

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Abstract

The invention discloses a preparing method of a lignin modified PHA biodegradable plastic. The preparing method comprises the steps of 1, conducting vacuum drying on a certain amount of polyhydroxyalkanoate and lignin for certain time; 2, adding dried polyhydroxyalkanoate, lignin, chain extender, antioxidant, plasticizer, lubricant and heat stabilizer in a high mixing machine, and conducting full mixing; 3, extruding the mixed materials into granules through a twin-screw extruder; 4, conducting membrane blowing on the obtained lignin-PHA composite plastic at certain temperature to prepare the lignin modified PHA biodegradable plastic. According to the preparing method of the lignin modified PHA biodegradable plastic, by introducing a biologic material lignin, the lignin-PHA composite plastic prepared through compound modification meets the demand for complete degradation, meanwhile, the mechanical property of pure PHA resin is strengthened, the cost of the plastic is effectively reduced, and the plastic is more beneficial to market popularization.

Description

technical field [0001] The invention relates to the technical field of biological plastics, in particular to a lignin-modified PHA biodegradable plastic and a preparation method thereof. Background technique [0002] At present, with the continuous development of the national economy, the consumption of plastic products is increasing, and synthetic plastics are playing an increasingly important role in production and life. However, since most of the plastic products cannot be degraded after being discarded, they exist for a long time, and the continuous accumulation has caused serious white pollution. Environmentally friendly plastic products are becoming more and more urgent and have aroused extensive interest of researchers. Among them, degradable resins have become a research hotspot due to their degradation characteristics and economic characteristics. [0003] Polyhydroxyalkanoates (PHA), developed rapidly in the past 20 years, is a kind of intracellular polyester synt...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/00C08K5/098C08K5/11C08K5/20C08K5/103C08K5/526B29D7/01
CPCC08L67/04B29D7/01C08J5/18C08J2367/04C08J2497/00C08L2201/06C08L2203/16C08L2205/03
Inventor 施晓旦邵威金霞朝
Owner JINING MING SHENG NEW MATERIALS CO LTD
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