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Preparation method of polyvinylidene fluoride (PVDF) adsorption film

An adsorption membrane and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of adsorption capacity, low adsorption efficiency, complex preparation process, etc. Anti-pollution ability, improved surface energy, improved effect of complexing ability

Active Publication Date: 2016-11-09
山东膜泰环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a method for preparing a PVDF adsorption membrane to solve the problems of complex preparation process, low adsorption capacity and low adsorption efficiency of the existing PVDF adsorption membrane, and to better remove heavy metal ions such as copper, mercury, nickel, and cadmium in water bodies

Method used

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  • Preparation method of polyvinylidene fluoride (PVDF) adsorption film
  • Preparation method of polyvinylidene fluoride (PVDF) adsorption film
  • Preparation method of polyvinylidene fluoride (PVDF) adsorption film

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specific Embodiment approach 1

[0031] Specific embodiment one: the preparation method of a kind of PVDF adsorption film in this embodiment is completed by following steps:

[0032] PVDF modification: Take 28g of low molecular weight PVDF powder, dissolve it in 160.6g of N,N-dimethylformamide solvent, stir in a constant temperature water bath at 65°C for 5 hours, add 0.2g of potassium persulfate as an initiator, stir well, and then Slowly add 11.2g of vinyl benzoate within 10min, where the mass ratio of PVDF to vinyl benzoate is 0.4:1, react for 0.5h, pour the mixed solution into deionized water to solidify, and fully soak for 12h to obtain PVDF and benzoic acid Vinyl blend resin.

[0033] Put the blended resin of PVDF and vinyl benzoate into a vacuum drying oven, dry at 105°C for 4 hours, then crush it into a powder of about 50 mesh with a pulverizer, pour it into a beaker, and add Ca(OH) with a pH value of 7.5 ) 2 The solution was heated in a constant temperature water bath at 70°C, and magnetically stir...

specific Embodiment approach 2

[0038] Specific embodiment two: the preparation method of a kind of PVDF adsorption film in the present embodiment is completed by following steps:

[0039] PVDF modification: Take 28g of low molecular weight PVDF powder, dissolve it in 160.6g of N,N-dimethylacetamide solvent, stir in a constant temperature water bath at 65°C for 5 hours, add 0.2g of ammonium persulfate as an initiator, stir well, and then Slowly add 11.2g of vinyl benzoate within 10min, where the mass ratio of PVDF to vinyl benzoate is 0.4:1, react for 0.5h, pour the mixed solution into deionized water to solidify, and fully soak for 12h to obtain PVDF and benzoic acid Vinyl blend resin.

[0040] Put the blended resin of PVDF and vinyl benzoate into a vacuum drying oven, dry at 105°C for 4 hours, then crush it into a powder of about 60 mesh with a pulverizer, pour it into a beaker, and add Ca(OH) with a pH value of 7.5 ) 2 The solution was heated in a constant temperature water bath at 70°C, and magneticall...

specific Embodiment approach 3

[0044] Specific embodiment three: the preparation method of a kind of PVDF adsorption film in the present embodiment is completed by following steps:

[0045] PVDF modification: Take 28g of low molecular weight PVDF powder, dissolve it in 160.6g of N,N-dimethylformamide solvent, stir in a constant temperature water bath at 65°C for 5 hours, add 0.2g of potassium persulfate as an initiator, stir well, and then Slowly add 11.2g of vinyl butyrate within 10min, where the mass ratio of PVDF to vinyl butyrate is 0.4:1, react for 0.5h, pour the mixture into deionized water to solidify, and fully soak for 12h to obtain PVDF and butyrate Vinyl blend resin.

[0046] Put PVDF and vinyl butyrate blended resin in a vacuum drying oven, dry at 105°C for 4 hours, then crush it into a powder of about 50 mesh with a pulverizer, pour it into a beaker, and add Ca(OH) with a pH value of 7.5 ) 2 The solution was heated in a constant temperature water bath at 70°C, and magnetically stirred at 250r...

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Abstract

The invention discloses a preparation method of a polyvinylidene fluoride (PVDF) adsorption film and belongs to the technical field of water treatment films. The preparation method comprises that PVDF as a main film material is modified and is used for combination with a functional organic compound, the surface of a liner tube is coated with the functional organic compound, and the surface of an adsorbent is coated with the modified PVDF so that the PVDF adsorption film is obtained. The PVDF adsorption film can be used for removing heavy metal ions such as copper, mercury, cadmium and nickel in water. The functional organic compound in the adsorption film is a chelating agent with a strong metal ion bonding capability. Through the PVDF adsorption film, the hydrophilic PVDF and the adsorbent are combined so that water is produced without external pressure and the PVDF adsorption film has effects of adsorption and filtration and characteristics of large adsorption capacity, high adsorption efficiency and easy desorption in an acidic solution. The preparation method has simple processes and a low cost.

Description

technical field [0001] The invention belongs to the technical field of membranes for water treatment; in particular, it relates to a preparation method of an adsorption membrane combined with a functional polymer and hydrophilic PVDF, which can absorb heavy metal ions such as copper, mercury, nickel, and cadmium in water, and is used in the chemical industry, Drinking water and other water treatment industries, with large adsorption capacity and high efficiency. Background technique [0002] Heavy metals affect the structure and function of aquatic ecosystems and the utilization of water resources, seriously threatening human health and the survival of animals and plants. The toxicity of heavy metal elements in water varies, and most of them are non-degradable toxic substances, which do not have natural purification ability and are difficult to remove from water bodies. [0003] After the functional material is modified, it can be combined with metal ions in the water body ...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08F118/04C08L31/02C08L27/18C08L71/00C08K5/17C08K5/315C02F1/28C02F1/44C02F101/20
CPCC02F1/285C02F1/44C02F2101/20C08F118/04C08J5/18C08J2331/02C08J2427/18C08L31/02C08L2203/16C08L2205/03C08L27/18C08L71/00C08K5/17C08K5/315
Inventor 崔学军王忠祥刘洪兵张瑛琪
Owner 山东膜泰环保科技股份有限公司