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Modified natural plant fiber oil absorbent and preparation and application methods thereof

A natural plant fiber and oil-absorbing agent technology, applied in the direction of plant fiber, fiber treatment, separation methods, etc., can solve the problems of moisture, poor buoyancy, restrictions, etc., and achieve the effect of no secondary pollution, excellent oil absorption performance, and low cost

Active Publication Date: 2017-05-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large number of hydroxyl groups in cellulose, such materials generally have disadvantages such as poor buoyancy, water absorption while absorbing oil, and easy to be damp or rotted, which largely limits their applications.

Method used

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  • Modified natural plant fiber oil absorbent and preparation and application methods thereof
  • Modified natural plant fiber oil absorbent and preparation and application methods thereof
  • Modified natural plant fiber oil absorbent and preparation and application methods thereof

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preparation example Construction

[0029] One aspect of the embodiments of the present invention provides a method for preparing a modified natural plant fiber oil-absorbing agent, which includes:

[0030] Provide natural plant fiber base material;

[0031] Physically modifying the natural plant fiber substrate, at least forming a hydrophobic natural polymer film on the surface of the natural plant fiber substrate, to obtain the modified natural plant fiber oil-absorbing agent, the hydrophobic natural polymer The membrane has a multi-level nano-microstructure.

[0032] As one of the preferred embodiments, the physical modification at least includes the steps of crushing and grinding, beating, drying, first impregnation and second impregnation in sequence.

[0033] In some more typical embodiments of the present invention, the preparation method of the modified natural plant fiber oil-absorbing agent may include the following steps:

[0034] (1) Crushing and grinding: one or more natural plant fibers are groun...

Embodiment 1

[0052] (1) Crushing and grinding: 100 g of natural straw fibrils were ground and pulverized at room temperature, and screened with a 50-mesh sieve to obtain 95 g of natural straw fibrils for later use.

[0053] (2) Beating: adopt the plant fiber dry pulp made of 95g of natural straw fibrils, add 1000mL of hot water to mix, help the fibers to moisten, beat under the condition of controlling the pulp concentration to be 8.7%, and the beating time 60min to obtain natural straw fibril pulp.

[0054] (3) Drying: Dry the natural straw fibril pulp at 105° C. for 12 hours to constant weight, take it out and seal it, and obtain 80 g of natural straw fibrils for use.

[0055] (4) First impregnation: Add 5 g of sodium alginate (with a high molecular weight of 500,000 Da) into 200 mL of water, mix evenly and stir for 40 min to fully dissolve it. Soak 80 g of natural straw fibrils in the mixed solution for 30 minutes, take them out, squeeze them dry, and dry them in a vacuum oven at 120° ...

Embodiment 2

[0058] (1) Crushing and grinding: 100 g of natural corn stalk fibrils were ground and pulverized at room temperature, and sieved with an 80-mesh sieve to obtain 90 g of natural corn stalk fibrils for later use.

[0059] (2) Beating: adopt the plant fiber dry pulp made of 90g of natural corn stalk fibrils, add 900mL of hot water to mix, help the fibers to moisten and expand, beat under the condition of controlling the slurry concentration to 9%, and the beating time 90min to obtain natural corn stalk fibril pulp.

[0060] (3) Drying: Dry the natural corn stalk fibril pulp at 125° C. for 18 hours to constant weight, take it out and seal it, and obtain 80 g of natural corn stalk fibrils for later use.

[0061] (4) First impregnation: Add 5 g of methylcellulose (high molecular weight 200,000 Da) into 300 mL of water, mix evenly and stir for 60 min to fully dissolve. Soak 80 g of natural corn stalk fibrils in the mixed solution for 60 minutes, take them out, squeeze them dry, and ...

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Abstract

The invention discloses a modified natural plant fiber oil absorbent and preparation and application methods thereof. The preparation method comprises providing a natural plant fiber substrate, and then performing physical modification on the natural plant fiber substrate to form a hydrophobic natural high-polymer membrane on the surface of the natural plant fiber substrate and further to obtain the modified natural plant fiber oil absorbent, wherein the hydrophobic natural high-polymer membrane is in a hierarchical nano microstructure. The physical modification comprises crushing grinding, pulping, drying, first impregnating and second impregnating. The preparation method of the modified natural plant fiber oil absorbent is simple and easy to operate, wide in source of raw materials which are all natural products, and low in cost; the obtained modified natural plant fiber oil absorbent has the advantages of being high in hydrophobicity, lipophilicity and oil absorption rate and velocity, good in oil and water selectivity, easy to convey and store, good in buoyancy, high in oil retention rate, good in biodegradability and the like, and can be applied to treatment on leakage of petroleum and organic solvent, kitchen oily dirt and the like. Meanwhile, the modified natural plant fiber oil absorbent can keep afloat before and after absorption, thereby being convenient to recover and postprocess and avoiding secondary pollution to the environment.

Description

technical field [0001] The invention relates to an oil-absorbing agent, in particular to a modified natural plant fiber oil-absorbing agent, its preparation method and application, and belongs to the technical field of synthesis and preparation of oil-absorbing agents. Background technique [0002] In recent years, oil spills at sea and pipelines have occurred frequently, and oil pollution from food production, catering industry, petrochemical industry and oil exploitation is also very serious. These oil substances are harmful to the increasingly fragile It is extremely destructive to the ecology and the environment. For example, crude oil has poor biodegradability in the natural environment, and if it stays for a long time, it will cause serious water pollution and soil pollution. How to deal with these pollutions will be a big problem that we need to solve at present. Currently, many methods have been used to clean up oil-contaminated areas, such as mechanical extraction,...

Claims

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Application Information

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IPC IPC(8): D06M15/13D06M15/09D06M10/00D06M15/15B01J20/24B01J20/28C02F1/28C02F1/40D06M101/04
CPCB01J20/24B01J20/28033B01J20/28054C02F1/286C02F1/40D06M10/00D06M15/09D06M15/13D06M15/15D06M2101/04
Inventor 张丹郑君红黄婵娟龙柱
Owner JIANGNAN UNIV
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