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Preparation method of strawberry-shaped organic/inorganic crosslinked microsphere orientation filling enhanced chemical fibers

An inorganic cross-linking and organic technology, applied in the field of reinforced chemical fibers, can solve the problems of material defects, poor compatibility, weak interfacial force and other problems, and achieve the effects of less mechanical defects, uniform dispersion and reduced energy consumption

Active Publication Date: 2020-10-30
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the compatibility between the two-phase polymers is usually poor, resulting in weak force at the phase interface, which can easily lead to defects inside the material

Method used

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  • Preparation method of strawberry-shaped organic/inorganic crosslinked microsphere orientation filling enhanced chemical fibers
  • Preparation method of strawberry-shaped organic/inorganic crosslinked microsphere orientation filling enhanced chemical fibers
  • Preparation method of strawberry-shaped organic/inorganic crosslinked microsphere orientation filling enhanced chemical fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0078] (1) Take 100 mL of glacial acetic acid solution with a pH value of about 4 in a four-necked flask, add 0.4 mL of MPS, and pre-hydrolyze for 5 min in an ice-water bath at a stirring speed of 150 rpm.

[0079] (2) Add ammonia water to the pre-hydrolyzed solution in step (1) to adjust the pH value of the mixed solution to about 7.

[0080] (3) Take St and BA according to the proportions shown in Examples 1-3 in Table 1 and mix evenly, weigh 0.05g AIBN and dissolve it in the monomers taken. After the monomer is added to the mixture in (2), adjust the stirring speed to 200rpm, and maintain the emulsification under the condition of ice-water bath (100w) for 60min.

[0081] (4) Get 20mL of SiO with a content of 1wt% and a particle size of 30nm 2 Mix the dispersion liquid with 0.6mL triethylamine evenly, and pass through the syringe pump (100mL·h -1 Speed) add step (3) gained emulsion. Sonicate for 30 min in an ice-water bath.

[0082] (5) Nitrogen was passed through the em...

Embodiment 4、5

[0086] (1) Take 0.8-1.2mL MPS in a glacial acetic acid solution with a pH of about 4, and pre-hydrolyze it in an ice-water bath at a stirring speed of 150rpm for 5min.

[0087] (2) Add ammoniacal liquor to the prehydrolyzate obtained in (1) to adjust to neutrality.

[0088] (3) Mix 4gSt, 1gBA and 0.05gAIBN evenly, add to the neutral solution obtained in (2), and emulsify with ultrasound (100w) for 60min in an ice-water bath.

[0089] (4) Through the syringe pump (100mL·h -1 speed) in step (3) in the gained emulsion, adding 20mL content is 1wt%, particle diameter is the SiO of 30nm 2 Dispersion liquid and 0.6mL triethylamine, continue to sonicate for 30min.

[0090] (5) The stable emulsion obtained in (4) was passed through nitrogen to remove oxygen, and then added to initiate free radical polymerization. The polymerization condition was to react at 70° C. for 8 hours. The product was centrifuged and washed with ethanol (centrifugal speed 12000 rpm, centrifugation time 10 mi...

Embodiment 6、7

[0094] (1) Take 0.8mL MPS and pre-hydrolyze it in glacial acetic acid solution for 6-7min. Add ammonia water after pre-hydrolysis to adjust to neutrality.

[0095] (2) Mix 4g St, 1g BA and 0.05g AIBN evenly, add to the neutral solution obtained in (1), and emulsify with ultrasound (100w) for 60min in an ice-water bath.

[0096] (3) Through a syringe pump (100mL·h -1 Speed) Add 20mL of SiO with a content of 1wt% and a particle size of 30nm in the emulsion obtained in step (2). 2 Dispersion liquid and 0.6mL triethylamine, continue to sonicate for 30min.

[0097] (4) The stable emulsion obtained in (3) was passed through nitrogen to exhaust oxygen, and then added to initiate free radical polymerization, and the polymerization condition was to react at 70° C. for 8 hours. The product was centrifuged and washed with ethanol (centrifugal speed 12000 rpm, centrifugation time 10 min) for 3 times and then dried to obtain a white powder.

[0098] (5) After mixing the dried composite...

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Abstract

The invention discloses a preparation method of strawberry-shaped organic / inorganic crosslinked microsphere orientation filling enhanced chemical fibers. The preparation method includes the steps thatmonomer droplets are stabilized through pre-hydrolysed MPS and SiO2 nano-particles, and strawberry-shaped crosslinked composite microspheres are prepared through Pickering emulsion polymerization; and the microspheres and chemical slices are mixed, and after the processes such as melt spinning, drafting and winding, modified chemical fibers with the crosslinked composite microspheres for orientation filling enhancement are obtained. MPS pre-hydrolysed products for stabilizing the monomer droplets in Pickering emulsion are anchored on the surfaces of inorganic particles, and the interaction force between the inorganic particles and a polymer matrix is enhanced; and crosslinking structures in the microspheres provide deformation in the melt extrusion-stretching process for the composite microspheres, one-dimensional orientation micro-fiber structures are formed, the breaking strength of micro-fibers is enhanced, and radial mechanical defects are reduced.

Description

technical field [0001] The invention relates to the technical field of reinforced chemical fibers, in particular to a preparation method of strawberry-shaped organic / inorganic crosslinked microspheres oriented filling reinforced chemical fibers. Background technique [0002] With the continuous development of my country's economy and technology, and the increasing and diversifying social needs, higher requirements are put forward for the production and preparation of high-performance and specific chemical fibers. At present, although my country's chemical fiber industry is developing rapidly, the main products are still concentrated in the daily life application field, the product homogeneity is serious, and the price competition is fierce. Therefore, preparing high-strength and specific chemical fibers is an effective way to break through the price war, form core technologies, and increase market competitiveness. [0003] At present, the methods for chemical fiber modifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01F6/92C08F212/08C08F220/18C08F230/08C08F2/44C08K3/36D01D5/08D01D5/12
CPCC08F2/44C08F212/08C08K3/36D01D5/08D01D5/12D01F1/10D01F6/92C08F220/1804C08F230/085
Inventor 戚栋明汪继承黄骅隽孙阳艺李家炜
Owner ZHEJIANG SCI-TECH UNIV
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