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Method for preparing full-degradable composite material filled with modified polylactic acid

A completely degradable, composite material technology, applied in the field of composite material preparation, can solve the problems of high cost, unavailability of corn gluten, poor compatibility, etc.

Inactive Publication Date: 2012-08-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a preparation method of a fully degradable filled modified polylactic acid composite material to solve the problems of high cost, poor compatibility and unutilized zein of the current biodegradable composite material

Method used

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  • Method for preparing full-degradable composite material filled with modified polylactic acid
  • Method for preparing full-degradable composite material filled with modified polylactic acid
  • Method for preparing full-degradable composite material filled with modified polylactic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prescription: the weight and number ratio of each raw material is:

[0032] 100 parts of polylactic acid, molecular weight 40000, 0.6 parts of maleic anhydride, 0.1 parts of dicumyl peroxide, 0.5 parts of triphenyl phosphite, 5 parts of zein;

[0033] step:

[0034] (1) Vacuum-dry the zein in an oven at 50°C for 24 hours;

[0035] (2) Add the raw materials into the high-speed mixer in the following order for stirring: polylactic acid, maleic anhydride, and dicumyl peroxide and stir for 5 minutes at a stirring speed of 1500 rpm and a temperature of 80°C; then add the dried corn Protein and triphenyl phosphite, stirred for 5 minutes, stirring speed 1500 rpm, temperature 100°C, discharged and cooled naturally for later use;

[0036] (3) Put the uniformly mixed materials into the twin-screw extruder. The temperature of the extruder is set at 150°C, the speed of the main machine is 100r / min, and it is stretched, cooled, pelletized, dried and packaged.

Embodiment 2

[0038] Prescription: the weight and number ratio of each raw material is:

[0039] 100 parts of polylactic acid, molecular weight 100000, 1.8 parts of maleic anhydride, 0.5 parts of benzoyl peroxide, 1.8 parts of trinonyl phosphite, 12.5 parts of zein;

[0040] step:

[0041] (1) Vacuum-dry the zein in an oven at 50°C for 24 hours;

[0042] (2) Add the raw materials into the high-speed mixer in the following order and stir: polylactic acid, maleic anhydride, and benzoyl peroxide and stir for 7 minutes at a stirring speed of 1800 rpm and a temperature of 100°C; then add the dried zein and trinonyl phosphite, stirred for 8 minutes, the stirring speed was 1800 rpm, the temperature was 120°C, and the discharged material was cooled naturally for later use;

[0043] (3) Put the uniformly mixed materials into the twin-screw extruder. The temperature of the extruder is set at 165°C, the speed of the main machine is 150r / min, and it is stretched, cooled, pelletized, dried and package...

Embodiment 3

[0045] Recipe: The weight ratio of each raw material is: 100 parts of polylactic acid, molecular weight 200000, 3 parts of maleic anhydride, 1.0 part of dicumyl peroxide, 3 parts of trinonyl phosphite, 20 parts of zein;

[0046] step:

[0047](1) Vacuum-dry the zein in an oven at 50°C for 24 hours;

[0048] (2) Add the raw materials into the high-speed mixer in the following order and stir: polylactic acid, maleic anhydride, dicumyl peroxide and stir for 10 minutes at a stirring speed of 2000 rpm and a temperature of 120°C; then add the dried corn Protein and trinonyl phosphite, stirred for 10 minutes, stirring speed 2000 rpm, temperature 140°C, discharged and cooled naturally for later use;

[0049] (3) Put the uniformly mixed materials into the twin-screw extruder. The temperature of the extruder is set at 180°C, the speed of the main machine is 200r / min, and it is stretched, cooled, pelletized, dried and packaged.

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Abstract

The invention relates to a method for preparing a full-degradable composite material filled with modified polylactic acid and belongs to a method for preparing a full-degradable composite material. The method comprises the following steps of: stirring polylactic acid, maleic anhydride and peroxide which are used as raw materials for 5 to 10 minutes at a temperature of 80 DEG C to 120 DEG C; then adding dried corn protein and phosphite ester materials and stirring for 5 to 10 minutes at a temperature of 100 DEG C to 140 DEG C; and putting the uniformly mixed materials into a double-screw extruder to extrude. The corn protein is used to fill the modified polylactic acid, so that not only can the corn protein be recycled, but also the cost of the composite material can be reduced, the environment pollution can also be reduced and the mechanical property of polylactic acid can also be improved.

Description

technical field [0001] The invention belongs to a preparation method of a fully degradable composite material. Background technique [0002] my country is the second largest corn producer and the second largest corn consumer in the world. The industrial consumption of corn in my country has been increasing year by year, and industrial consumption has accounted for 20% to 30% of the total corn consumption. Among them, starch production accounts for the largest proportion of corn industrial consumption. , A certain amount of corn protein will be produced during the processing of corn starch. In corn, starch accounts for 75% and corn protein accounts for 10.6%. These corn proteins are disposed of as waste, which not only wastes resources but also pollutes the environment. [0003] Most of the polymer materials used in our daily life are petroleum-based polymers, whose wastes are difficult to degrade and cause environmental pollution after being discarded. However, degradable bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/08C08L89/00C08K5/524C08K5/526C08F283/02B29C47/92B29C48/92
CPCB29C48/0022B29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 张贵林吴文福白岚佟毅崔毅潘丽爱
Owner JILIN UNIV