Cationic functional fluorine-containing polymer and preparation method thereof

A cationic and functionalized technology, which is applied in the field of cationic functionalized fluoropolymers and its preparation, can solve the problems of low content of copolymer components, incompatibility, and limited application range of fluoropolymer materials, and achieve strong positive charge Performance, the effect of good antibacterial performance

Active Publication Date: 2016-10-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few water-soluble positively charged monomers copolymerized with fluorine-containing monomers in the existing fluorine-containing copolymers, so the existing fluorine-containing copolymers cannot be specially used to prepare antibacterial materials
And the comonomers in the existing fluorine-containing copolymers are mostly oil-soluble monomers (such as vinyl acetate, acrylate, etc.), and the copolymerization content can reach 10~20wt%; There is also a small amount of water-soluble monomers (such as maleic anhydride , acrylic acid, etc.), but because the fluorine-containing monomer is in the oil phase and the comonomer is in the water phase during the polymerization process, the two phases cannot be miscible, resulting in a particularly low content of water-soluble monomer components in the copolymer, only 5wt % or less, which makes the existing fluorine-containing copolymers not have good hydrophilicity
The low content of copolymeric components and the absence of positively charged comonomers greatly limit the application range of fluoropolymer materials

Method used

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  • Cationic functional fluorine-containing polymer and preparation method thereof
  • Cationic functional fluorine-containing polymer and preparation method thereof
  • Cationic functional fluorine-containing polymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0144] Synthesis of Cationic Functionalized Fluoropolymer P1:

[0145] Add 2000ml deionized water, additive polyvinyl alcohol (PVA) 1.2g, additive hydroxypropyl methylcellulose (HPMC) 0.4g, initiator peroxydicarbonate bis(2-ethylhexyl) in the stainless steel reaction kettle (EHP) 1g, evacuated and filled with nitrogen repeatedly 3 times, then added 1500g of vinylidene fluoride, 21.79g of hydroxyethyl acrylate and 4.85g of allyl 2-bromo-2-methylpropionate, pre-dispersed and stirred at room temperature for 30 minute. The temperature was raised to a polymerization temperature of 47° C. to carry out a polymerization reaction. React for 12 hours, stop heating when the pressure drop in the kettle reaches 0.2MPa, volatilize naturally for 15 minutes, feed air for 5 minutes, vacuumize and fill with nitrogen three times, add trimethylallyl ammonium chloride 31.76g, copper 5g, cuprous chloride 5g, 2,2'-bipyridine (bpy) 16g, then temperature controlled at 60°C, reacted for 24 hours, (su...

Embodiment 2

[0162] Synthesis of Cationic Functionalized Fluoropolymer P2:

[0163] P2 synthetic process with reference to embodiment 1. The formula is shown in Table 1 and the process parameters are shown in Table 2.

[0164] The P2 structure and performance characterization methods are the same as those described in Example 1. The general formula of the P2 structural formula is the same as that of P1, and the parameters in the general formula are shown in Table 3; the molecular weight, molecular weight distribution and content of cationic functional monomer components in the polymer of P2 are shown in Table 4.

Embodiment 3

[0166] Synthesis of Cationic Functionalized Fluoropolymer P3:

[0167] The synthesis process of P3 refers to Example 1. The formula is shown in Table 1 and the process parameters are shown in Table 2.

[0168] The P3 structure and performance characterization methods are the same as those described in Example 1. The general structure of P3 is the same as that of P1, and the parameters in the general formula are shown in Table 3; the molecular weight, molecular weight distribution and content of cationic functional monomer components in the polymer of P3 are shown in Table 4.

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Abstract

The invention discloses a cationic functional fluorine-containing polymer and a preparation method thereof. The functional fluorine-containing polymer is a cationic functional fluorine-containing polymer prepared by the steps of: taking a fluorine-containing monomer, a graftable active monomer and a hydrophilic functional monomer as copolymerization monomers, firstly polymerizing, in a water phase dispersion system, the copolymerization monomers into an active precursor polymer of which the main chain contains an atom transfer free radical polymerization active side group, then initiating a cationic functional monomer by using the active side group on a solid liquid interface to perform interface atom transfer free radical polymerization, and performing polymerization to form the cationic functional fluorine-containing polymer containing a cationic type side chain. The cationic type side chain contains quaternary ammonium salt type and quaternary phosphonium salt type groups, has a very strong charge positive electrical property, and enables the polymer to have very strong antibacterial performance, hydrophilic performance and anion exchange absorbing performance, and the polymer can be applied separately to preparation or together with other resin to blending preparation of a high-hydrophilicity antibacterial separation membrane product, a gel electrolyte, an adhesive, a battery diaphragm, an anion exchange adsorbing material and an antibacterial coating, so that the application range of vinyl chloride type polymers is greatly broadened; and in comparison with an existing material, the polymer is good in hydrophilicity, is antibacterial, and is good in application prospect.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a cationic functionalized fluorine-containing polymer and a preparation method thereof. Background technique [0002] Fluorine atoms have strong electronegativity, low polarizability, weak van der Waals force and high bond energy (485.3kJ / mol) of C-F bond, which makes fluoropolymers have outstanding heat resistance, solvent resistance, acid and alkali corrosion resistance, Excellent weather resistance, flame retardancy, and unique low surface energy, etc. Fluorine-containing polymers are mainly divided into fluorine-containing olefin polymers and fluorine-containing acrylate polymers. [0003] Polyvinylidene fluoride (PVDF) is non-toxic and odorless, and its appearance is translucent or white powder or granules. Ultraviolet radiation and aging resistance; the molecular chains of PVDF are closely arranged, the crystallinity is high, the hydrophobicity is large, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F259/08C08F226/02C08F263/00C08F220/34C08F265/04C08F230/02B01J41/12
Inventor 朱宝库银雪姚之侃王纳川方立峰周名勇崔月许云秋包永忠朱利平
Owner ZHEJIANG UNIV
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