CaCO3 surface treatment method for high-filling PBAT biodegradable film and preparation method of film

A biodegradation and surface treatment technology, used in biological packaging, applications, household appliances, etc., can solve the problems of ecological environment and human life hazards, difficult to degrade, pollute the air, etc., to improve process defects, easy operation, and preparation technology. simple effect

Pending Publication Date: 2020-07-17
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disposable plastic packaging boxes, lunch boxes, plastic bags and other plastic products made of general-purpose plastics are discarded as waste after use. Because they are difficult to degrad...

Method used

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  • CaCO3 surface treatment method for high-filling PBAT biodegradable film and preparation method of film
  • CaCO3 surface treatment method for high-filling PBAT biodegradable film and preparation method of film
  • CaCO3 surface treatment method for high-filling PBAT biodegradable film and preparation method of film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 3000 mesh CaCO 3 As filler filling PBAT to prepare composite material, its preparation process is as follows:

[0031] (1) Dry PBAT at a temperature of 80°C for 8 hours; for 3000 mesh CaCO3 For surface treatment, the surfactant was dissolved in isopropanol in a glass reactor, and then different meshes of CaCO 3 Pour into the solution, stir at room temperature for 2 hours, then add isopropanol to stir, filter, volatilize isopropanol at 85°C, and dry to obtain surface-treated CaCO 3 , at room temperature the surface-treated CaCO 3 Stir in a self-friction high mixer until the temperature of the self-friction high mixer rises to 100°C to remove CaCO 3 Small and medium molecular impurities and moisture, and then put the dispersant, PBAT, chain extender, lubricant and antioxidant into the self-friction high mixer, and continue to blend for 8 minutes.

[0032] (2) Put the mixture into a twin-screw extruder to extrude, cool and pelletize to obtain the required pellets. The ...

Embodiment 2

[0048] 2300 mesh CaCO 3 As filler filling PBAT to prepare composite material, its preparation process is as follows:

[0049] (1) Dry the PBAT at a temperature of 80°C for 8 hours; for 2300 mesh CaCO 3 For surface treatment, the surfactant was dissolved in isopropanol in a glass reactor, and then different meshes of CaCO 3 Pour into the solution, stir at room temperature for 2 hours, then add isopropanol to stir, filter, volatilize isopropanol at 85°C, and dry to obtain surface-treated CaCO 3 , at room temperature the surface-treated CaCO 3 Stir in a self-friction high mixer until the temperature of the self-friction high mixer rises to 100°C to remove CaCO 3 Small and medium molecular impurities and moisture, and then put the dispersant, PBAT, chain extender, lubricant and antioxidant into the self-friction high mixer, and continue to blend for 8 minutes.

[0050] (2) Put the mixture into a twin-screw extruder to extrude, cool and pelletize to obtain the required pellets....

Embodiment 3

[0066] 1250 mesh CaCO 3 As filler filling PBAT to prepare composite material, its preparation process is as follows:

[0067] (1) Dry PBAT at a temperature of 80°C for 8 hours; for 1250 mesh CaCO 3 For surface treatment, the surfactant was dissolved in isopropanol in a glass reactor, and then different meshes of CaCO 3 Pour into the solution, stir at room temperature for 2 hours, then add isopropanol to stir, filter, volatilize isopropanol at 85°C, and dry to obtain surface-treated CaCO 3 , at room temperature the surface-treated CaCO 3 Stir in a self-friction high mixer until the temperature of the self-friction high mixer rises to 100°C to remove CaCO 3 Small and medium molecular impurities and moisture, and then put the dispersant, PBAT, chain extender, lubricant and antioxidant into the self-friction high mixer, and continue to blend for 8 minutes.

[0068] (2) Put the mixture into a twin-screw extruder to extrude, cool and pelletize to obtain the required pellets. Th...

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Abstract

The invention discloses a CaCO3 surface treatment method for a high-filling PBAT biodegradable film and a preparation method of the film. The invention belongs to the technical field of high polymer materials. The high-filling PBAT biodegradable film is prepared from the following raw materials: 50 to 90 percent of PBAT, 10 to 50 percent of CaCO3, 0 to 3 percent of a surfactant, 0 to 1 percent ofa dispersing agent, 0 to 1 percent of a chain extender, 0 to 1 percent of a lubricating agent and 0 to 1 percent of an antioxidant. CaCO3 is modified through a surfactant and then mixed with PBAT andother auxiliaries, twin-screw granulation is conducted, and then film blowing is conducted through a film blowing machine. The surfactant organic silicon material reacts with a trace amount of water on the surface of CaCO3 to be hydrolyzed so that a Si-X bond forms a Si-OH bond, and the Si-OH bond and -OH on the CaCO3 surface undergo polycondensation dehydration to form a monomolecular film, thereby promoting the hydrophilicity of the modified CaCO3 surface to be changed into hydrophobicity, effectively enhancing the compatibility between CaCO3 and PBAT, and ensuring that the activation degreeof the modified CaCO3 is up to 90% or above.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer materials, in particular to a CaCO2 film used for highly filled PBAT biodegradable films 3 Surface treatment technology and PBAT / CaCO 3 Preparation and application of biodegradable film. Background technique [0002] With the deepening of the current "white pollution" problem, the preparation of new environmentally friendly and degradable materials has become an inevitable trend. Disposable plastic packaging boxes, lunch boxes, plastic bags and other plastic products made of general-purpose plastics are discarded as waste after use. Because they are difficult to degrade, they bring serious pressure and harm to the ecological environment and human life. , if it is burned, it will produce harmful gases that pollute the air and cause serious harm to the human body. In addition, with the reduction of non-renewable resources such as petroleum, the development and utilization of new en...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/06C08L33/02C08K9/06C08K9/04C08K3/26C08J5/18B29C48/00B29C48/395B29C48/40B29C48/625B29C48/92B29C55/28B65D65/46
CPCC08J5/18B29C48/0018B29C48/40B29C48/397B29C48/625B29C48/92B29C55/28B65D65/466C08J2367/02C08J2423/06C08J2433/02C08K9/06C08K9/08C08K9/04C08K2003/265B29C2948/9258B29C2948/92704B29L2007/00Y02W90/10
Inventor 翁云宣宋鑫宇张婷陈小杰董广杰杜华
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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