Polyvinyl butyral blending enhanced polyvinylidene chloride membrane and preparation method thereof

A technology of polyvinyl butyral and polyvinylidene chloride, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problem that polyvinylidene chloride membranes have poor mechanical properties and cannot be used as micro-ultrafiltration membranes Material and other issues, to achieve the effect of controllable pore size, low cost, and enhanced tensile elongation at break

Active Publication Date: 2022-06-07
NINGBO SHUIYI FILM TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the polyvinylidene chloride membrane has poor mechanical properties and cannot be used as a micro-ultrafiltration membrane material in the prior art, the present invention provides a polyvinylidene chloride membrane enhanced by polyvinyl butyral blending and Its preparation method, the polyvinylidene chloride film reinforced by polyvinyl butyral blending described in the present invention has good mechanical properties, simple preparation process and industrial production

Method used

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  • Polyvinyl butyral blending enhanced polyvinylidene chloride membrane and preparation method thereof
  • Polyvinyl butyral blending enhanced polyvinylidene chloride membrane and preparation method thereof
  • Polyvinyl butyral blending enhanced polyvinylidene chloride membrane and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] Mix 360g of PVDC with a degree of polymerization of 1900, 40g of PVB with a viscosity of 400mPa.s, 200g of polyvinylpyrrolidone with a molecular weight of 10000, 100g of ethylene glycol, and 1300g of dimethylacetamide at 50°C, stir and dissolve for 24 hours, and remove Soak to obtain the casting solution, apply the casting solution on a clean glass plate with a 100 μm thick spatula at 40°C, and after standing for 10 seconds, completely immerse the film in a mixed solution of ethylene glycol and dimethylacetamide at 40°C The medium gel is solidified and shaped for 60s, then taken out and placed in pure water, soaked at room temperature for 12 hours, then transferred to an oven for 12 hours at 40°C;

[0036] Using a scanning electron microscope to observe the cross-section of the filter membrane, the photo is as follows figure 1 shown.

Embodiment 2

[0038] Mix 360g of PVDC with a polymerization degree of 1900, 40g of PVB with a viscosity of 3000mPa.s, 200g of polyvinylpyrrolidone with a molecular weight of 10000, 100g of ethylene glycol, and 1300g of dimethylacetamide at 50°C, stir and dissolve for 24 hours, and defoam To obtain the casting solution, apply the casting solution on a clean glass plate with a 100 μm thick spatula at 40°C, and after standing for 10 seconds, completely immerse the film in a mixed solution of ethylene glycol and dimethylacetamide at 40°C The gel was solidified and shaped for 60 seconds, then taken out and soaked in pure water at room temperature for 12 hours, then transferred to an oven for 12 hours at 40°C.

Embodiment 3

[0040]Mix 360g of PVDC with a degree of polymerization of 1900, 100g of PVB with a viscosity of 400mPa.s, 180g of polyvinylpyrrolidone with a molecular weight of 10,000, 100g of ethylene glycol, and 1260g of dimethylacetamide at 50°C, stir and dissolve for 24 hours, and defoam to obtain a casting Film solution, at 40°C, apply the film casting solution on a clean glass plate with a 100 μm thick spatula, and then completely immerse the film in a mixed solution of ethylene glycol and dimethylacetamide at 40°C for gel curing and forming for 60s , then taken out and soaked in pure water at room temperature for 12 hours, then transferred to an oven for drying at 40°C for 12 hours.

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Abstract

The invention relates to the field of filtering membrane materials, and discloses a polyvinyl butyral blending enhanced polyvinylidene chloride membrane and a preparation method thereof in order to solve the problem that a polyvinylidene chloride membrane in the prior art is poor in mechanical property and cannot be used as a micro-ultrafiltration membrane material. The polyvinylidene chloride/polyvinyl butyral composite material is prepared from the following components: 10 to 30 wt% of polyvinylidene chloride, 0.1 to 10 wt% of polyvinyl butyral, 0.5 to 20 wt% of a pore-foaming agent, 0.5 to 10 wt% of an additive and 50 to 80 wt% of a solvent. The polyvinyl butyral and the polyvinylidene chloride are blended, so that the tensile elongation at break of the polyvinylidene chloride film is enhanced, the mechanical property of the polyvinylidene chloride film is improved, micropores in the prepared polyvinylidene chloride film are uniformly distributed, the pore size is controllable, the preparation steps are simple, the cost is low, and industrial production can be realized.

Description

technical field [0001] The invention relates to the field of filter membrane materials, in particular to a polyvinylidene chloride membrane enhanced by polyvinyl butyral blending and a preparation method thereof. Background technique [0002] Due to the advantages of high efficiency, simple equipment, convenient operation, energy saving and environmental protection, membrane separation technology has shown great application potential in the industrial field, and its application range has been extended to biology, medicine, environmental protection, energy, seawater desalination, wastewater treatment, etc. field. Membrane materials are the core basic materials of membrane separation technology. Among them, ultrafiltration membranes and microfiltration membranes are the most widely used microporous membrane materials. [0003] Polyvinylidene chloride (PVDC) is a non-toxic, odorless, light yellow polymer synthesized from vinylidene chloride (VDC) as the main monomer. PVDC is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00
CPCB01D71/34B01D69/02B01D67/0011B01D67/0016B01D67/0095B01D2325/24Y02A20/131
Inventor 虞源李俊俊沈立强肖力鹏叶磊
Owner NINGBO SHUIYI FILM TECH DEV CO LTD
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