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Pollution-resistant wine film and preparation method thereof

A wine and anti-pollution technology, applied in the field of membrane materials, can solve the problems of poor adhesion between the PDMS membrane layer and the inorganic base membrane, reduce the separation performance and service life of the composite membrane, and affect the separation performance of the membrane. Mechanical strength, repeatable effect

Pending Publication Date: 2019-03-22
JIANGSU JIUMO HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the alcohol-permeable separation membranes used in industrial applications are composite membranes coated with a layer of PDMS separation layer on the surface of the inorganic base membrane. In the actual application process, there are poor bonding between the PDMS membrane layer and the inorganic base membrane, and the large pore size of the base membrane surface leads to the loss of PDMS Membrane coating is easy to leak, plug holes, composite membrane is easy to pollute and other problems reduce the separation performance and service life of the composite membrane
[0004] In addition, the raw wine in the wine production process contains impurities such as pectin and pigments, which will cause membrane fouling during the separation process and affect the separation performance of the membrane.

Method used

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  • Pollution-resistant wine film and preparation method thereof
  • Pollution-resistant wine film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Polyaryletherketone is polyetherketone (PEK), and the dry polyetherketone (PEK) is placed in 98% concentrated H 2 SO 4 , where PEK is mixed with concentrated H 2 SO 4 The mass volume ratio of the solution is 1:20g / mL, keep stirring until PEK is completely dissolved, sulfonate at 55°C for 24 hours, add the resulting solution to ice water to stop the sulfonation reaction, and filter out the settled solid after standing The solid matter was washed and dried to obtain sulfonated polyetherketone (SPEK) with a sulfonation degree of 80%.

[0044](2) Adopting N,N-dimethylacetamide as the film casting solvent, dissolving sulfonated polyether ketone in the film casting solvent, preparing a film casting solution with 10% mass percentage of sulfonated polyether ketone, filtering, Reserve after defoaming.

[0045] (3) Apply the casting solution prepared in step (2) on a clean glass plate with a 200 μm scraper, and then put the coated sulfonated polyetherketone support into a...

Embodiment 2

[0050] (1) polyarylether ketone selects polyether ketone (PEK), adopts the mixed acid of oleum of 102% and the concentrated sulfuric acid of 95% as sulfonation reagent, wherein the mass volume ratio of PEK and mixed acid is 1:10g / mL, sulfonation reaction at 35°C for 12 hours, the resulting solution was added to ice water to stop the sulfonation reaction, and the precipitated solid was filtered out after standing, and the solid was washed and dried to obtain a sulfonation degree of 70%. Sulfonated polyetherketone (SPEK).

[0051] (2) Using N-methylpyrrolidone as the casting solvent, dissolving the sulfonated polyether ketone in the casting solvent, preparing a casting solution with a mass percentage of sulfonated polyether ketone of 10%, filtering and defoaming for later use .

[0052] (3) Apply the casting solution prepared in step (2) on a clean glass plate with a 250 μm scraper, and then put the coated sulfonated polyetherketone support into a hydrogel bath at 40°C to coag...

Embodiment 3

[0056] (1) Polyaryletherketone is polyetherketone (PEK), using chlorosulfonic acid as the sulfonating reagent, wherein the mass volume ratio of PEK and chlorosulfonic acid is 1:15g / mL, and the sulfonation reaction is carried out at 30°C for 48 After 1 hour, the resulting solution was added to ice water to stop the sulfonation reaction. After standing still, the precipitated solid was filtered out. The solid was washed and dried to obtain sulfonated polyetherketone (SPEK) with a sulfonation degree of 90%.

[0057] (2) Adopting N,N-dimethylformamide as the film casting solvent, dissolving sulfonated polyether ketone in the film casting solvent, preparing a film casting solution with a mass percentage of 30% of sulfonated polyether ketone, filtering, Reserve after defoaming.

[0058] (3) Apply the casting solution prepared in step (2) on a clean glass plate with a 180 μm scraper, and then put the coated sulfonated polyetherketone support into a hydrogel bath at 60°C to coagulate....

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Abstract

The invention discloses a pollution-resistant wine film and a preparation method thereof and belongs to the field of preparation of film materials. A support layer of the wine film is a sulfonated polyaryletherketone film; an active layer is arranged on the surface of the support layer and comprises hydrophobic nano titanium dioxide and amino-terminated polydimethylsiloxane. The preparation methodof the wine film comprises the following steps: (1) preparing sulfonated polyaryletherketone; (2) preparing a sulfonated polyaryletherketone film casting solution; (3) preparing a sulfonated polyaryletherketone support body; (4) preparing an amino-terminated polydimethylsiloxane film casting solution; and (5) preparing the film casting solution prepared in step (4) into the pollution-resistant wine film through a scrape coating method. The preparation method of the pollution-resistant wine film is simple; the prepared wine composite film has high temperature resistance, high heat stability, super hydrophobicity and mechanical strength, also has pollution resistance and corrosion resistance, and is applied to wine application.

Description

technical field [0001] The invention belongs to the technical field of membrane materials, and in particular relates to an anti-pollution wine membrane and a preparation method thereof. Background technique [0002] At present, wine has a considerable consumer market, has high nutritional value, and has multiple health benefits. But contain a lot of ethanol in the wine, and ethanol has toxic side effect to human body, and prior art usually reduces the ethanol content in the wine by distillation process. The conventional wine production process is pot distillation or tower distillation. The ethanol in the wine is distilled by heating and vacuuming, but the distillation consumes a lot of energy, and the low-volatility aroma substances in the wine will also be distilled together with the ethanol. , resulting in a change in the aroma of the wine and losing its original quality characteristics. [0003] In the field of membrane separation, pervaporation is a new type of membr...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D69/10B01D69/12B01D71/52B01D67/00
CPCB01D67/0079B01D69/02B01D69/10B01D69/12B01D71/52
Inventor 丁晓斌孙雪飞赵祥强戴萍萍王成张云
Owner JIANGSU JIUMO HIGH TECH CO LTD
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