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A two-step method for strengthening the lipophilic properties of polypropylene fibers

A polypropylene fiber and performance technology, applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of high preparation cost, long cycle, complicated pretreatment process, etc., to increase the specific surface area and increase the storage capacity. The effect of oil performance and low material cost

Active Publication Date: 2018-07-24
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complex pretreatment process, long period and high preparation cost in this method, it is not suitable for the high-efficiency lipophilic modification of polypropylene fibers.

Method used

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  • A two-step method for strengthening the lipophilic properties of polypropylene fibers
  • A two-step method for strengthening the lipophilic properties of polypropylene fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Initiated by benzoyl peroxide and grafted with one-component butyl methacrylate (BMA) to strengthen the lipophilic properties of polypropylene fibers.

[0027] Step 1: Weigh 200g polypropylene fiber and perform the following pre-cleaning treatment to remove the original oily substances and other impurities on the surface of polypropylene fiber:

[0028] 1> Soak in acetone solution and 10wt%-20wt% ethanol in turn for 2 hours;

[0029] 2> Transfer to deionized water for ultrasonic cleaning for 30 minutes;

[0030] 3> Dry the cleaned polypropylene fiber in a constant temperature box at 35°C for 8 hours and set aside.

[0031] Soak the pre-cleaned polypropylene fiber in 20% sulfuric acid solution, keep the temperature at 70°C for 1 hour, take it out, rinse it with deionized water for 3 times, and dry it in a constant temperature box at 35°C for 6 hours.

[0032] Step 2: Place the polypropylene fiber obtained in step 1 in a batch-type carbonization furnace, unde...

Embodiment 2

[0038] Example 2: Initiated by azobisisobutyronitrile, multi-component butyl methacrylate (BMA) and lauryl methacrylate (LMA) were grafted to strengthen the lipophilic properties of polypropylene fibers.

[0039] After the polypropylene fiber was pre-cleaned as described in Example 1, it was placed in 60% sulfuric acid solution, kept at a constant temperature of 1 hour at 70°C, rinsed 3 times with deionized water after taking it out, and placed in a constant temperature box , and dried at 35°C for 6 hours. Subsequently, the polypropylene fibers were subjected to the same carbonization treatment as in Example 1 in a batch type carbonization furnace to endow the fibers with a microporous structure on the surface.

[0040] According to Example 1, the beaker with 1 L of deionized water was placed in a constant temperature stirrer and heated to 70 ° C, and 4% azobisisobutyronitrile (Shanghai Aladdin Biochemical Technology Co., Ltd.), 1% Polysorbate 80 and 1% Span 85 were stirred u...

Embodiment 3

[0042] Example 3: Initiated by azobisisobutyronitrile and grafted with one-component lauryl methacrylate (LMA) to strengthen the lipophilic properties of polypropylene fibers.

[0043] According to Example 1, the beaker with 1L of deionized water was placed in a constant temperature stirrer and heated to 70°C, and 4% azobisisobutyronitrile, 1% polysorbate 80 and 1% The Span 85, 400rpm low-speed stirring and mixing, prepared into the trigger solution. Select 3% single-component lauryl methacrylate as grafting monomer, be used for the reinforced lipophilic modification of polypropylene fiber of the same weight, wherein precleaning and carbonization treatment process are consistent with embodiment 2, grafting reaction Conditions and post-cleaning steps were identical to Example 1.

[0044] The grafting rate of the lipophilic polypropylene fiber reinforced with lauryl methacrylate obtained under this condition was significantly increased, which was 16.5%. At the same time, a lar...

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Abstract

The invention belongs to the technical field of material modification and particularly relates to a method for enhancing lipophilicity of a PP (polypropylene) fiber in two steps. Firstly, surface pretreatment is performed on the PP fiber with an acid solution, a lot of micropores are distributed in the surface of the fiber, the specific surface area is increased, the oil storage capability of the fiber is improved, then in combination with the chemical grafting copolymerization technology, one-component or multi-component alkyl (meth) acrylate is used as a monomer and matched with an initiator and a sweller, and grafting modification treatment is performed on the fiber; a lipophilic group is introduced onto the fiber, and the effect of enhancing adsorption separation is realized under the affinity effect of the lipophilic group and an organic liquid, and the lipophilic adsorption performance of the fiber is obviously improved. Meanwhile, the modified PP fiber is endowed with backwashing regeneration performance, and the method has the broad applicability.

Description

technical field [0001] The invention relates to the technical field of material modification, in particular to a two-step method for strengthening the lipophilic performance of polypropylene fibers. Background technique [0002] Industrial wastewater often contains a large amount of organic liquids. These organic liquids have complex components, high toxicity, and are difficult to treat. Research and development of new organic liquid adsorption materials have attracted people's attention. The new adsorbent materials researched and manufactured around high oil-absorbing performance have improved the adsorption capacity of organic liquids to a certain extent, but are limited by complicated manufacturing processes and high manufacturing costs, and have not been widely promoted and applied. On the contrary, the development of new adsorbent materials based on low-cost materials has become a research hotspot. Among them, polypropylene fiber has the characteristics of high strengt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/36D01F9/22
CPCD01F9/22D06M14/36
Inventor 白志山王炳捷
Owner EAST CHINA UNIV OF SCI & TECH
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