Paper-based functional material for oil-water separation, preparation method and application thereof

A functional material, oil-water separation technology, applied in the field of water treatment, can solve the problems of low separation efficiency, high energy consumption, secondary pollution, etc., to improve strength, optimize oil-water separation performance, improve hydrophilicity and underwater oil-water separation effect of effect

Inactive Publication Date: 2020-06-02
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods are simple to operate, they have serious defects such as low s

Method used

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  • Paper-based functional material for oil-water separation, preparation method and application thereof
  • Paper-based functional material for oil-water separation, preparation method and application thereof
  • Paper-based functional material for oil-water separation, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Preparation of paper-based functional material for oil-water separation

[0035] 1) Preparation of base paper

[0036] The bleached softwood chemical pulp board (dryness: 90wt%) was soaked in water at room temperature for 24 hours, and then torn into small pieces of 25×25mm, and then the pulp was decomposed for 5 minutes with a fiber standard disintegrator at a concentration of 1wt%. The pulp concentration after decomposing was concentrated to 10wt%, and the pulp was beaten with a PFI refiner (KRK, Kumagai Riki Kogyo), and the rotation speed was set at 1500 rpm, 3000 rpm, and 4000 rpm, respectively. The Choppel beating degree meter (ZJ-100) was used to measure the beating degree at different speeds, as shown in Table 1. Take the pulp suspension equivalent to 2.2g of absolute dry pulp and add it to the shaper of the sheet machine (RK-3A, Austria). When the slurry volume is diluted to 4L, add 300ppm (corresponding to the absolute dry pulp) of 0.2wt %CPAM, the basis...

Embodiment 2

[0042] Example 2 Preparation of paper-based functional material for oil-water separation

[0043] 1) Preparation of base paper

[0044] Poplar chemical pulp (dryness: 65.8 wt%) was soaked in water at room temperature for 24 hours to form a pulp with a concentration of 1 wt%. The pulp was then decomposed for 5 minutes with a fiber standard disintegrator. The pulp concentration after decomposing was concentrated to 10wt%, and the pulp was beaten with a PFI refiner (KRK, Kumagai Riki Kogyo), and the rotation speed was set at 3500 rpm, 4000 rpm, and 4500 rpm. The Choppel beating degree meter (ZJ-100) was used to measure the beating degree at different speeds, as shown in Table 2. Take the pulp suspension equivalent to 1.9g of absolute dry pulp and add it to the former of the sheet machine (RK-3A, Austria). When the volume of the slurry is diluted to 4L, add 0.2wt of 300ppm (relative to the absolute dry pulp) %CPAM, the basis weight of each paper is set to 60g / m 2 . After vacuum fil...

Embodiment 3

[0052] Example 3 Performance test of paper-based functional materials

[0053] Strength measurement method: All paper samples are placed in a constant temperature and humidity room at 50% relative humidity and 23°C for 24 hours. According to the Standard Test Method of the Technical Association of Pulp and Paper Industry (TAPPI), the dry tensile strength and wet tensile strength of the treated paper were measured. When measuring the wet tensile strength of the paper, immerse the sample in water to ensure that the moisture content of the paper is 50% (allowable error ± 2%). The measurement is repeated 6 times for each sample. Figure 4 It is the tensile strength of different paper-based functional materials. by Figure 4 (a) It can be seen that the dry tensile strength of the paper modified by citric acid has been improved, but the citric acid concentration has no obvious influence on the dry tensile strength of the paper. by Figure 4 (b) It can be found that compared with the ...

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Abstract

The invention discloses a preparation method of a paper-based functional material for oil-water separation, and belongs to the technical field of water treatment. The preparation method specifically comprises the following steps: by taking lignocellulose as a raw material, citric acid as a cross-linking and functionalizing reagent and sodium hypophosphite as a catalyst, preparing the paper-based functional material with good wet strength and oil-water separation performance by adopting papermaking, dipping, drying and curing processes. According to the invention, the wet tensile strength of the paper-based functional material can reach 18 Nm/g at most, the contact angle of oil drops such as trichloromethane, castor oil and the like under water can reach more than 150 DEG, the paper-based functional material has underwater super-oleophobic performance, and can efficiently filter mixtures of organic solvents such as trichloromethane, castor oil, methylbenzene, ethyl acetate and the likeand water, and the oil-water separation efficiency can reach more than 99%; and the paper-based functional material for oil-water separation is simple in material, easy to manufacture, environment-friendly, high in oil-water separation efficiency and good in industrial application prospect.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and more specifically, relates to a paper-based functional material for oil-water separation and a preparation method thereof. Background technique [0002] Industrial production and human activities produce a large amount of oily wastewater every day, coupled with the serious leakage of offshore crude oil, if it is not treated in time, it will cause serious harm to the environment and human health. Oil pollution in water bodies mainly comes from human activities (approximately 92%), such as oil tanker accidents, oil spills and blowout accidents in offshore oil exploration, the discharge of oily sewage during port and ship operations, various industries and catering industries. Discharge of oily sewage, etc. Oil pollution mainly adheres to the water surface, which prevents normal exchange between the atmosphere and the water body. The photosynthesis capacity of aquatic plants has decreased an...

Claims

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Application Information

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IPC IPC(8): D21H27/08D21H21/10D21H17/45D21H17/66D21H17/14D21H11/02D21H21/20B01D17/02C02F1/40
CPCD21H27/08D21H21/10D21H17/45D21H17/66D21H17/14D21H11/02D21H21/20B01D17/02C02F1/40
Inventor 吴伟兵田寒蒋珊戴红旗
Owner NANJING FORESTRY UNIV
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