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A cross-linking modification method to maintain the original shape of linear polystyrene materials

A linear polystyrene, cross-linking modification technology, applied in fiber treatment, synthetic fibers, textiles and papermaking, etc., can solve problems affecting microscopic morphology and structure, reduce pre-crosslinking reaction rate, prolong reaction time, etc. Achieve the effects of wide range of shapes, perfect shape maintenance, and low raw material prices

Active Publication Date: 2022-03-29
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following problems: (1) In the pre-crosslinking step, the high complexation of the solvent (glacial acetic acid) and the catalyst (ferric chloride) greatly reduces the pre-crosslinking reaction rate and prolongs the reaction time; (2 ) The reaction temperature as high as 80°C causes the polymer molecular chains to move violently in the solvent, causing severe shrinkage and adhesion, which affects the microscopic morphology and structure; (3) The method steps are complicated and the cycle is long

Method used

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  • A cross-linking modification method to maintain the original shape of linear polystyrene materials
  • A cross-linking modification method to maintain the original shape of linear polystyrene materials
  • A cross-linking modification method to maintain the original shape of linear polystyrene materials

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Effect test

Embodiment 1

[0028] A cross-linking modification method for maintaining the original shape of a linear polystyrene material, the steps are as follows:

[0029] (1) Preparation of the mixed solution: Add 40 mL of n-hexane, 5 mL of diethoxymethane and 2 g of ferric chloride into a 100 mL beaker in sequence, seal it with plastic wrap, and stir and mix at room temperature for 10 min. After the stirring finishes, take the supernatant to obtain a mixed solution;

[0030] (2) Cross-linking modification of the linear polystyrene hollow fiber membrane: sandwich the linear polystyrene hollow fiber membrane between two layers of polyethylene mesh and fix it, put it into the mixed solution obtained in step (1), and heat it at 30 The reaction was stirred at ℃ for 1 h. After the reaction, the product was washed with water and absolute ethanol respectively, and dried to obtain the target product.

[0031] FESEM images of linear polystyrene hollow fiber membranes (a, b) and target products (c, d) are sho...

Embodiment 2

[0037] The difference from Example 1 is that the "linear polystyrene hollow fiber membrane" in step (2) is changed to "linear polystyrene nanospheres (1 g)", and the linear polystyrene nanospheres are directly The spheres were added to the mixed solution obtained in step (1), and reacted at 60 °C for 48 h; the rest of the steps were the same as in Example 1.

[0038] The FESEM photo of the target product is shown in Figure 7 . Figure 7 It shows that after crosslinking, the spherical shape of the linear polystyrene nanospheres is well maintained, preventing the deformation and adhesion of the balls, indicating that the method of the present invention successfully realizes the crosslinking modification of the linear polystyrene nanospheres.

Embodiment 3

[0040] The difference from Example 1 is that the "linear polystyrene hollow fiber membrane" in step (2) is changed to "linear polystyrene spin-coated film", and the linear polystyrene spin-coated film is directly placed in the step (1) In the obtained mixed solution, react at 0°C for 24 h; the rest of the steps are the same as in Example 1.

[0041] Digital photographs of the linear polystyrene spin-coated film (a) and the target product (b) are shown in Figure 8 . Figure 8 It is shown that after crosslinking, the crosslinked polystyrene film maintains the morphology and integrity of the linear polystyrene spin-coated film.

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Abstract

The invention belongs to the technical field of linear polystyrene modification, and specifically discloses a crosslinking modification method for maintaining the original shape of linear polystyrene materials. The steps are as follows: (1) Preparation of the mixed solution: at room temperature, mix n-hexane, diethoxymethane, and ferric chloride, stir evenly, take the supernatant to obtain the mixed solution; (2), linear polymer Cross-linking modification of styrene materials: under constant stirring, add linear polystyrene materials into the mixed solution obtained in step (1), and react at 0~60°C for 10 min~48 h; after the reaction, the product Rinse with water and ethanol respectively, and dry to obtain a cross-linked polystyrene material. The method of the invention has simple steps, mild conditions, fast reaction, safety and controllability; the obtained highly cross-linked polystyrene material maintains the original shape of the linear polystyrene material, and is an ideal carbon material precursor.

Description

technical field [0001] The invention belongs to the technical field of linear polystyrene modification, and in particular relates to a crosslinking modification method for maintaining the original shape of linear polystyrene materials. [0002] technical background [0003] Polystyrene has excellent chemical, thermal stability and mechanical properties. Due to its easy processing, it is often prepared into materials of different dimensions and sizes, and is widely used in the fields of microfiltration, nanofiltration, adsorption, oil-water separation and composite materials. In addition, polystyrene's ultra-high carbon content (92.4%) makes it an ideal carbon material precursor. [0004] However, the applications of linear polystyrene are greatly limited by the low degree of crosslinking. Linear polystyrene is easily dissolved in most polar organic reagents (such as toluene and chloroform, etc.), which will seriously damage the original microstructure and morphology of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/02D06M13/165D06M11/28C08J7/14C08J3/24D06M101/18
CPCD06M13/02D06M11/28D06M13/165C08J7/14C08J3/24C08J2325/06D06M2101/18
Inventor 陈加福胡天照路小庆付建伟陈志民
Owner ZHENGZHOU UNIV
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