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Starch composite ultrafiltration membrane and preparation method thereof

An ultrafiltration membrane and starch technology, applied in the field of membrane separation, can solve the problems of easy loss, uneven distribution, unstable hydrophilic groups, etc., and achieve environmental protection, uniform distribution, excellent water resistance and hydrophilicity. sexual effect

Active Publication Date: 2014-06-04
珠海市邦膜科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the unstable structure of the ultrafiltration membrane caused by the hydrophilic modification of the current organic polymer ultrafiltration membrane, it is easy to delaminate, fall off, and the hydrophilic group grafted on the surface is unstable, easy to lose, unevenly distributed, and the secondary In view of the defects of secondary pollution, a starch composite ultrafiltration membrane and its preparation method are proposed. Two-way stretching is made into a film, and finally a starch composite ultrafiltration membrane is obtained by pore-making treatment. The ultrafiltration membrane prepared by this invention not only has excellent hydrophilicity and pollution resistance, but also has good water resistance, Mechanical strength and toughness, no secondary pollution of separation and filtration, simple preparation method, low production cost, and easy industrial production

Method used

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  • Starch composite ultrafiltration membrane and preparation method thereof

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Effect test

Embodiment 1

[0034] 1) Add 30 parts by weight of cornstarch, 3 times the weight of starch in deionized water and 3 parts by weight of sodium hypochlorite into the reactor, stir and heat up to 80°C at a speed of 50r / min, and pretreat the starch. The time is 30min, discharging, and drying and pulverizing the obtained pretreated starch;

[0035]2) Add the pretreated starch obtained in step 1) with 35 parts by weight of polyethylene, 3 parts by weight of borate, 4 parts by weight of calcium carbonate, 2 parts by weight of paraffin, and 4 parts by weight of diammonium hydrogen citrate In the high-speed mixer, mix at a speed of 800r / min for 10min and discharge to obtain the compound;

[0036] 3) Add the mixture obtained in step 2) into a twin-screw extruder for cross-linking polymerization. The material stays in the extruder for 4 minutes, and then the extruded material is processed by a biaxial stretching film forming machine. Forming a film to make a starch-composite film;

[0037] 4) Immers...

Embodiment 2

[0040] 1) Add 40 parts by weight of tapioca starch, 3 times the weight of starch in deionized water and 6 parts by weight of this potassium chlorate into the reactor, stir at a speed of 50r / min and raise the temperature to 90°C to pretreat the starch , the time is 40min, discharging, and drying and pulverizing the obtained pretreated starch;

[0041] 2) Add the pretreated starch obtained in step 1), 45 parts by weight of polypropylene, 3 parts by weight of thiazole crosslinking agent, 4 parts by weight of magnesium carbonate, 2 parts by weight of paraffin, and 2 parts by weight of urea into the high-speed In the mixer, mix at a speed of 800r / min for 20min and discharge to obtain the mixture;

[0042] 3) Add the mixture obtained in step 2) into a twin-screw extruder for cross-linking polymerization. The material stays in the extruder for 4 minutes, and then the extruded material is processed by a biaxial stretching film forming machine. Forming a film to make a starch-composit...

Embodiment 3

[0045] 1) Add 35 parts by weight of potato starch, 3 times the weight of starch in deionized water and 5 parts by weight of hydrogen peroxide into the reactor, stir at a speed of 60r / min and raise the temperature to 80°C to pre-heat the starch. Processing, the time is 35min, discharging, and drying and pulverizing the obtained pretreated starch;

[0046] 2) Combine the pretreated starch obtained in step 1) with 35 parts by weight of polyether ketone, 4 parts by weight of biphenylguanidine crosslinking agent, 5 parts by weight of sodium carbonate, 3 parts by weight of polyethylene wax, 3 parts by weight of and polyol ester phthalates are added into the high-speed mixer, mixed at a speed of 900r / min for 20min and discharged to obtain the mixture;

[0047] 3) Add the mixture obtained in step 2) into a twin-screw extruder for cross-linking polymerization. The material stays in the extruder for 5 minutes, and then the extruded material is processed by a biaxial stretching film form...

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Abstract

The invention relates to a starch composite ultrafiltration membrane and a preparation method thereof. Specifically, the starch composite ultrafiltration membrane is obtained by performing cross-linking polymerization reaction on modified starch and micromolecular polymer through an extruder, performing biaxial stretching to prepare a film and performing pore-forming treatment. The prepared ultrafiltration membrane is high in hydrophilcity, pollution resistant, water resistant and tough, strong in mechanical strength, low in production cost and is easily subjected to industrial production, and has a high application value, and the preparation method is simple.

Description

technical field [0001] The invention relates to the field of membrane separation, in particular to a starch composite ultrafiltration membrane and a preparation method thereof. Background technique [0002] Ultrafiltration technology is a membrane filtration method, which belongs to the field of membrane separation. Ultrafiltration is to effectively retain bacteria, most viruses, colloids and Membrane separation technology for the purpose of separation, classification, purification and concentration of sludge. Due to its operating temperature around room temperature, easy operation and relatively simple equipment, it has been widely used in the field of industry and life. It is used in the separation, concentration and purification of biological products, pharmaceutical products and food industries, and it is also used in blood treatment. Seawater desalination (RO) wastewater treatment, drinking water purification and terminal treatment device in ultrapure water preparation...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/08B01D71/26B01D71/40B01D71/52B01D67/00
Inventor 陈庆李兴文
Owner 珠海市邦膜科技有限公司