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Modified PGA material and preparation method thereof, and modified PGA film

A modification and raw material technology, applied in the field of modified PGA materials and their preparation, and modified PGA films, can solve the problems affecting practical use, poor mechanical properties and processability, etc., and achieve good thermodynamic compatibility, good Compatibility and interaction, effects of rheological enhancement

Active Publication Date: 2021-10-19
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor mechanical properties and processability of PGA affect its practical use.

Method used

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  • Modified PGA material and preparation method thereof, and modified PGA film

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preparation example Construction

[0036] The present invention also provides a method for preparing the modified PGA material described in the above technical solution, comprising: mixing PGA, ionic liquid and filler, putting them into a twin-screw extruder to granulate, and then drying to obtain the modified PGA material. PGA material.

[0037] Wherein, the types and dosages of the PGA, ionic liquid and filler are consistent with those described in the previous technical solution, and will not be repeated here.

[0038] In the present invention, the mixing is performed by using a high-speed machine. The rotational speed of the mixing is preferably 90-100 rpm; the mixing time is preferably 1-1.5 h.

[0039] After the above mixing, the resulting mixture is put into a twin-screw extruder for granulation. Among the present invention, the condition of described twin-screw extruder is as follows:

[0040] Length-to-diameter ratio ≥ 1:55;

[0041] The temperature of the feeding section is 130-160°C, preferably 1...

Embodiment 1

[0053] 1. Raw materials:

[0054] 80 parts of PGA (weight average molecular weight is 100,000, melting point is 220°C);

[0055] 15 parts of 1-pentyl-3-methylimidazolium tetrafluoroborate;

[0056] Filler (talcum powder) 5 parts.

[0057] 2. Preparation:

[0058] Put PGA, ionic liquid and filler into a high-speed mixer, and mix at 90 rpm for 1 hour to obtain a mixture. The resulting mixture was put into a twin-screw extruder for granulation. The aspect ratio of the twin-screw extruder was 1:55, the temperature of the feeding section was kept at 150°C, the temperature of the mixing section was 230°C, and the temperature of the extrusion section was 230°C. And maintain vacuum treatment in the extrusion section. The material is granulated by means of water-stretching, and the temperature of the water tank is 55°C. The resulting masterbatch was dried at 80° C. for 2 hours to obtain a modified PGA material. The resulting product is packaged in aluminum foil, vacuumized and st...

Embodiment 2

[0060] 1. Raw materials:

[0061] 70 parts of PGA (weight average molecular weight is 200,000, melting point is 225°C);

[0062] 15 parts of 1-pentyl-3-methylimidazolium tetrafluoroborate;

[0063] Filler (nanometer calcium carbonate) 15 parts.

[0064] 2. Preparation:

[0065] PGA, ionic liquid and filler were put into a high-speed mixer, and mixed for 2 hours at 100 rpm to obtain a mixture. The resulting mixture was put into a twin-screw extruder for granulation. The aspect ratio of the twin-screw extruder was 1:45, the temperature of the feeding section was kept at 150°C, the temperature of the mixing section was 230°C, and the temperature of the extrusion section was 230°C. And maintain vacuum treatment in the extrusion section. The material is granulated by means of water-stretching, and the temperature of the water tank is 60°C. The resulting masterbatch was dried at 80° C. for 2 hours to obtain a modified PGA material. The resulting product is packaged in aluminum...

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Abstract

The invention provides a modified PGA material and a preparation method thereof, and a modified PGA film. The invention provides a modified PGA material. The modified PGA material is prepared from the following raw materials in parts by mass: 70-80 parts of PGA; 5-15 parts of an ionic liquid; and 5 to 25 parts of a filler; The ionic liquid is 1-pentyl-3-methylimidazolium tetrafluoroborate. The PGA material is modified by adopting the specific ionic liquid and the filler, so that the tensile strength, the elongation at break and the tensile modulus of the material can be effectively improved, the processability is improved, and good biodegradability is kept.

Description

technical field [0001] The invention relates to the field of organic materials, in particular to a modified PGA material, a preparation method thereof, and a modified PGA thin film. Background technique [0002] Plastic films and packaging materials are very common in daily life. With the introduction of the concept of green environmental protection, environmentally friendly and degradable materials have attracted more and more attention. Such as polylactic acid (PLA), polycaprolactone (PCL), polydioxanone (PDO), polybutylene succinate (PBS), polybutylene adipate-terephthalate ( PBAT), polyglycolic acid (PGA) and other biodegradable materials have been widely used. [0003] Among them, PGA (polyglycolic acid, also known as polyglycolide), due to the shortest repeating unit in its molecular structure, is the fastest degradation rate among aliphatic polyester materials. However, the poor mechanical properties and processability of PGA affect its practical use. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K3/34C08K5/3445C08K3/26C08J5/18
CPCC08K3/34C08K5/3445C08K3/26C08J5/18C08K2201/011C08K2003/265C08L2203/16C08J2367/04C08L67/04
Inventor 陈烜邢青涛黎坛王俊峰赵洁
Owner HAINAN SHINER IND
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