Hydrophobic antibacterial rigid polypropylene material and preparation method thereof

A polypropylene material and polypropylene block technology, applied in the field of hydrophobic and antibacterial rigid polypropylene materials and their preparation, can solve the problems of weak binding, easy water absorption and contamination of polypropylene materials, poor compatibility, etc., so as to overcome the compatibility problems. poor sex effect

Pending Publication Date: 2020-12-15
彭军文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Compared with general-purpose plastics, polypropylene has the advantages of light specific gravity, low price, good mechanical properties and good heat resistance. It is often used in medical, building materials and other fields as containers, pipes or other accessories; The characteristics of polypropylene materials are easy to absorb water and stain, breed bacteria, and cause harm to human health.
[0003] In the prior art, hydrophobic agents and antibacterial agents are mostly added to polypropylene by physical mixing. On the one hand, the addition of hydrophobic agents and antibacterial agents has the problem of poor compatibility with polypropylene; There is no chemical bond interaction between polypropylene, the binding effect between hydrophobic agent and antibacterial agent and polypropylene substrate is weak, the uniformity of dispersion of hydrophobic agent and antibacterial agent is not easy to ensure, and it is also difficult to avoid the composition of hydrophobic agent and antibacterial agent The loss problem directly affects the long-term hydrophobicity and antibacterial properties of the product; based on this, the present invention proposes a hydrophobic antibacterial rigid polypropylene material and its preparation method

Method used

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  • Hydrophobic antibacterial rigid polypropylene material and preparation method thereof
  • Hydrophobic antibacterial rigid polypropylene material and preparation method thereof
  • Hydrophobic antibacterial rigid polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of S-propionic acid-S'-(α-methyl-α'-acetic acid)-trithiocarbonate.

[0033] Add 3-mercaptopropionic acid (10mmol), 100mL distilled water and 20g 50% NaOH solution into a 500mL three-necked flask, stir for 30min, and slowly add CS 2 (5 mmol), stirred overnight. Slowly add 2-bromopropionic acid (5 mmol) dropwise. After overnight reaction, the product was acidified with concentrated hydrochloric acid for 30 min at room temperature, and the product was collected by suction filtration, washed with deionized water and dried in vacuo to obtain S-propionic acid-S'-( α-Methyl-α'-acetic acid)-trithiocarbonate, yield 40.2%. 1 H-NMR (400MHz, CDCl 3 ),δ(ppm):12.61(s,1H,COOH),12.06(s,1H,COOH),4.94(m,1H,CH),3.50(t,2H,CH 2 ),2.73(t,2H,CH 2 ),1.65(d,3H,CH 3 ).

Embodiment 2

[0035] Preparation of polypropylene macromolecular chain transfer agent.

[0036] Add S-propionic acid-S'-(α-methyl-α'-acetic acid)-trithiocarbonate (5.0mmol) and 20ml of anhydrous tetrahydrofuran THF into a 50mL branch bottle equipped with a stirring bar, and keep stirring Slowly add thionyl chloride SOCl dropwise 2 (5.0mmol), the temperature was raised to 70°C, refluxed for 1.5h, and the SOCl was distilled off under reduced pressure after the reaction was completed. 2 And THF, a yellow oily product was obtained, which was dissolved with an appropriate amount of toluene solution.

[0037] Add single-end hydroxyl polypropylene PP-OH (1.0mmol) into a 100mL branch bottle equipped with a stirrer, under N 2 Under the atmosphere, add 30ml of anhydrous toluene, heat to 70°C, stir continuously, add 1.0ml of pyridine after completely dissolved, stir for 30min, slowly add the above-mentioned yellow oily product dissolved in toluene solution, stir at 85°C for 2h, end After the reacti...

Embodiment 3

[0039] Preparation of polypropylene block polysilanes.

[0040] Add polypropylene macromolecular chain transfer agent (0.08mmol), phenyl (ethyl) silanediol (8mmol), AIBN (0.01mmol) and 8mL of toluene / DMF (10 / 1), after three cycles of liquid nitrogen freezing-pumping-thawing, placed in a pre-set 80°C oil bath for polymerization, after 1 hour of reaction, immediately take out the Schlenk bottle and immerse it in liquid nitrogen After cooling, the crude product was repeatedly precipitated in anhydrous ether, and the purified product was freeze-dried to obtain polypropylene block polysilane with a yield of 69.0%.

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Abstract

The invention discloses a hydrophobic antibacterial rigid polypropylene material and a preparation method thereof. The hydrophobic antibacterial rigid polypropylene material comprises the following components in parts by weight: 60-100 parts of polypropylene block polysilane, 1-2 parts of an anionic antibacterial agent, 5-20 parts of a toughening agent and 0.5-1.5 parts of a composite antioxidant,According to the invention, polysilane is blocked between polypropylene molecular chains, so polypropylene molecules have hydrophobicity, molecules of the blocked hydrophobic agent contain a large number of benzene rings, the rigidity of polypropylene is improved through introduction of the hydrophobic agent, and the antibacterial property of the polypropylene material is enhanced through interaction of polysilane and metal silver ions.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a hydrophobic and antibacterial rigid polypropylene material and a preparation method thereof. Background technique [0002] Compared with general-purpose plastics, polypropylene has the advantages of light specific gravity, low price, good mechanical properties and good heat resistance. It is often used in medical, building materials and other fields as containers, pipes or other accessories; The characteristics of polypropylene materials are easy to absorb water and stain, breed bacteria, and cause harm to human health. [0003] In the prior art, hydrophobic agents and antibacterial agents are mostly added to polypropylene by physical mixing. On the one hand, the addition of hydrophobic agents and antibacterial agents has the problem of poor compatibility with polypropylene; There is no chemical bond interaction between polypropylene, the binding effect between hyd...

Claims

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Application Information

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IPC IPC(8): C08L83/10C08L23/08C08K5/134C08K5/526C08K5/00C08K3/015C08F8/34C08F10/06
CPCC08L83/10C08G77/442C08F8/34C08L2205/06C08L23/0815C08K5/1345C08K5/526C08K5/0058C08K3/015C08F10/06
Inventor彭军文
Owner彭军文