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Polypropylene industrial yarn cloth grafting modification method

A graft modification and industrial technology, applied in the field of chemical modification of polymer materials, can solve the problems that the hydrophilicity, dyeability and adsorption separation of fibers and fabrics are not significantly improved, so as to increase solubility and improve fluid mechanics volume effect

Active Publication Date: 2014-07-16
江苏亿之博实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the current polypropylene monofilament graft modification technology, the surface of the fiber is always sporadically distributed with granular graft polymers. The improvement of the effect is not obvious

Method used

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  • Polypropylene industrial yarn cloth grafting modification method
  • Polypropylene industrial yarn cloth grafting modification method
  • Polypropylene industrial yarn cloth grafting modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-9

[0044] Arrange polypropylene industrial yarns in xylene solutions with different photosensitizer contents and dip them in, so that the weight gain of industrial silk fabrics reaches a balance, and then take them out and dry them in the air. The so-called "weight gain reaches balance" means that the weight of industrial silk cloth hardly changes or changes little with the increase of soaking time. For better illustration, Figure 4 The weight gain of the polypropylene fabric is given when the photosensitizer concentration is 15wt% in xylene solution soaked for different times. The bath ratio is 5:1, and the maximum weight gain is nearly 20% when the immersion time is 1h, which means that the weight gain after soaking for 1h Reach balance. Polypropylene industrial silk cloth containing photosensitizer (pre-impregnation conditions: bath ratio 10:1, immersion time 10min) is subjected to electron beam irradiation treatment, the sample is placed on a dynamic conveyor belt with a sp...

Embodiment 10-15

[0050] The steps of Examples 10-15 are roughly the same as those of Examples 1-9, except that: (1), the polypropylene industrial silk cloth that has been pre-dipped (bath ratio 20:1, soaking time 5 minutes) is subjected to high-radiation radiation treatment , the effective irradiation rate is 3kGy / h; (2), in the grafting solution, the mass percentage of molar salt is 1wt%, the crosslinking agent is 10wt%, the neutralization degree of acrylic acid is 90mol%, and the total monomer concentration is 50v%, The liquor ratio is 5:1, and the soaking time is 35 minutes.

[0051] Table 3 lists the effects of high-energy ray pre-irradiation dose and photosensitizer concentration on grafting rate.

[0052] serial number Photosensitizer content (%) High-energy radiation dose (kGy) Grafting rate (%) Example 10 5 15 15.3 Example 11 10 25 17.8 Example 12 30 50 24.8 Example 13 5 75 22.7

[0053] Example 14 10 100 24.8 Examp...

Embodiment 16-24

[0058] The steps of Examples 16-24 are roughly the same as those of Examples 1-9, the difference is: (1) The polypropylene industrial silk cloth that has been pre-soaked (bath ratio 2:1, soaking time 50min) is subjected to plasma glow discharge treatment, the irradiation power is 300W, and the residual air pressure is 2000Pa; (2), in the grafting solution, the mass percentage of molar salt is 0.01wt%, the crosslinking agent is 1wt%, the degree of neutralization of acrylic acid is 5mol%, and the total monomer The concentration is 10v%, the liquor ratio is 20:1, and the immersion time is 60min.

[0059] Table 4 shows the effects of plasma glow discharge treatment time and photosensitizer concentration on the grafting rate of acrylic acid / sodium. It can be seen from Table 4 that the grafting rate increases with the increase of photosensitizer concentration and irradiation time.

[0060] serial number Photosensitizer content (%) Plasma glow discharge time (s) Graft...

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Abstract

The invention discloses a polypropylene industrial yarn cloth grafting modification method. Pre-impregnating treatment and pre-irradiation treatment are performed to form a number of polar benzhydrol free radicals with high stability on the surfaces of fibers and inside the fibers, a small quantity of nonpolar polypropylene macromolecular chain free radicals with poor stability are replaced, and the adsorption and graft polymerization of monomers such as acrylic acid / sodium are facilitated. Sodium hydroxide is used for neutralizing acrylic monomers under electrostatic interaction of ions, so that the solubility of the monomers and the grafting macromolecular chain in a grafting solution is improved, the hydrodynamic volume of the macromolecular chain is increased, and the adsorption and graft modification of the monomers in the grafting chain are facilitated. According to the grafting modification method, the hydrophilcity, the dyeing property and the adsorption separation property of the polypropylene monofilament fabric can be achieved, and the grafting modified industrial yarn cloth can be widely applied to adsorption separation treatment of dye wastewater and heavy metal ion wastewater.

Description

technical field [0001] The invention relates to a method for modifying polymer materials, in particular to a method for grafting and modifying polypropylene industrial silk cloth, and belongs to the field of chemical modification of polymer materials. Background technique [0002] Non-polar polypropylene macromolecular chains limit its wide application, and various methods of grafting and modifying polypropylene fibers and fabrics have been explored. Xiao Weiwei grafted acrylic acid to the surface of ordinary polypropylene fibers with a benzoyl peroxide initiator method as early as 1994, and the grafting rate was as high as 14.5%, which improved the dyeability and hygroscopicity of the fibers [Xiao Weiwei, Yao Jiahua , Huang Xuejun. Structure and properties of acrylic grafted polypropylene fiber. Functional Materials 25 (4): 317-21, 1994]. Liu Bo et al grafted acrylic acid monomers to the surface of polypropylene nonwoven fabric for battery separators based on argon plasma ...

Claims

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Application Information

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IPC IPC(8): D06M14/28
Inventor 刘颖朱新生石小丽潘志娟朱林王宇阳
Owner 江苏亿之博实业有限公司
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