Bionic antioxidant polypropylene material and preparation method thereof

A polypropylene material and anti-oxidation technology, applied in the field of biomimetic anti-oxidation polypropylene material and its preparation, can solve the problems of unsatisfactory product effect, large environmental impact and high preparation cost, and achieve good anti-oxidation effect, Simple preparation process and easy operation

Pending Publication Date: 2020-01-17
YICHUN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 2,6-di-tert-butyl-p-cresol added in this method can effectively improve the oxidation resistance of the finished product, form a dense and strong carbon layer, which can effectively interrupt heat exchange and prevent the diffusion and escape of flammable gases. At the same time, it prevents oxygen from diffusing to the bottom material, delays the degradation of polymer materials, and thus plays a flame-retardant role. However, there are too many components added, and the use of the above-mentioned inorganic salts and heavy metal compounds has a greater impact on the environment. The preparation of products The cost is also higher
[0006] Therefore, in summary, the current industrial production and literature records mostly use traditional synthetic antioxidants or small molecular natural antioxidants to improve the antioxidant performance of polypropylene. The above-mentioned antioxidant polypropylene material products may produce Environmental hazards, or easy to migrate inside the polymer, the product effect is not satisfactory, how to provide a polypropylene material product with anti-oxidation function, especially a biomimetic anti-oxidation polypropylene material, while using ultrasonic assisted The preparation method of biomimetic anti-oxidation polypropylene material has not yet been reported.

Method used

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  • Bionic antioxidant polypropylene material and preparation method thereof
  • Bionic antioxidant polypropylene material and preparation method thereof
  • Bionic antioxidant polypropylene material and preparation method thereof

Examples

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preparation example Construction

[0039] Step 1) Preparation of the melanin particles: A. Using tyrosine solution as raw material, adding the tyrosine solution into a buffer solution with a pH value of 7.8-8.2, heating to a reaction temperature of 70-75°C, Then adjust pH to 9~10 with alkali solution, cool to 50~60 DEG C, obtain tyrosine reaction solution; B, tyrosinase is dissolved in the buffer solution identical with step A, then with step A described The tyrosine reaction solution was stirred and mixed for 5-10 minutes, cooled to room temperature and then reacted for 12-24 hours, and finally freeze-dried to obtain melanin particles; the buffer solution was a phosphate buffer solution, and the pH of the buffer solution was controlled to be 8. The alkali solution is sodium hydroxide solution or potassium hydroxide solution.

[0040] Step 2) The preparation of the polypropylene particles: (1) After fully mixing the polypropylene matrix and the melanin particles or polydopamine particles according to the mass r...

Embodiment 1

[0043] Take an ammonia solution with a mass ratio concentration of 28%-30%, mix it with ethanol and water at a volume ratio of 1:12.5 and 1:25, and place it in a reaction device, heat it at 40°C and gently stir and mix to obtain a mixed solution of ethanolamine Dissolving dopamine in a small amount of water, injecting it into the ethanolamine mixed solution, and reacting, controlling the reaction time to be 12 hours, centrifuging the obtained product for 15 minutes at 15,000 rpm, washing, and freeze-drying to obtain polydopamine particles.

[0044] Mix polypropylene with the polydopamine particles prepared above in a mass ratio of 100:0.5, add dropwise paraffin wax with a mass concentration ratio of 0.1%, stir in an electric mixer at high speed for 5 minutes, and add the obtained mixture into an extruder, Control the temperature of each section of the extruder from the feed to the head: 160°C, 180°C, 200°C, 200°C, control the screw speed of the extruder device to 50rpm, control...

Embodiment 2

[0046] Take an ammonia solution with a mass ratio concentration of 28%-30%, mix it with ethanol and water at a volume ratio of 1:12.5 and 1:25, and stir gently at 40°C. Dissolve dopamine in a small amount of water, inject ethanolamine mixed solution, and react for 12 hours. The product was centrifuged at 15000 rpm for 15 minutes, washed and freeze-dried to obtain polydopamine particles.

[0047] The polypropylene and the prepared polydopamine particles were mixed at a mass ratio of 100:0.5, 0.1% paraffin was added dropwise, and stirred in an electric mixer at high speed for 5 minutes. Add the mixture into the extruder, control the extruder from the feed to the machine head: 160°C, 180°C, 200°C, 200°C, that is, control the temperature range of the four zones of the extruder and the temperature of the fourth zone is the same Control at 200°C, control the screw speed of the extrusion device to 50rpm, control the ultrasonic frequency of the ultrasonic device to 15kHz, and the ult...

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Abstract

The invention discloses a bionic antioxidant polypropylene material and a preparation method thereof. The preparation method comprises the following steps: preparing polydopamine particles by taking dopamine as a raw material, or preparing black pigment particles by taking tyrosine as a raw material, mixing the black pigment particles or the polydopamine particles with polypropylene according to aratio of 0.1: (100-10), dropwise adding 0.1% of paraffin, and stirring for 5-10 minutes in an electric stirrer at a high speed; adding an obtained mixture to an extruder, controlling the temperatureof the extruder to be 160-180 DEG C, 170-190 DEG C and 180-200 DEG C, the ultrasonic frequency to be 10-20 kHz, the ultrasonic frequency is 0-400 W, extruding and granulating to obtain the bionic antioxidant polypropylene resin, and further processing and molding the granules to obtain required bionic polypropylene films, sheets, pipes or fibers and other materials.

Description

technical field [0001] The invention relates to a polypropylene material and a preparation method thereof, in particular to a bionic anti-oxidation polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is widely used in textile, packaging, transportation, construction and other industries due to its non-toxic, odorless, light weight, heat resistance, solvent resistance, good mechanical properties and processability. However, PP is very easy to break bonds and age under the action of ultraviolet rays, which reduces its molecular weight and shortens its service life, resulting in waste of resources, and also limits the application of PP materials in outdoor environments such as the automotive industry and the construction industry. Therefore, it is necessary to prepare PP materials with excellent oxidation resistance. [0003] According to the oxidation mechanism of PP, the most convenient solution to improve the antioxidant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L51/06C08L79/04C08K5/3417B29B9/06B29C48/92
CPCB29B9/06B29C48/92B29C2948/92704C08L23/12C08L23/14C08L51/06C08L2201/08C08L2205/03C08L2205/035C08L79/04C08K5/3417
Inventor 杨明涛胡杨卢海丹
Owner YICHUN UNIVERSITY
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