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Polystyrene-vinyl benzyl dimethyl dodecyl ammonium chloride-titanium dioxide composite material and preparation method thereof

A technology of vinylbenzyldimethyldodecyl ammonium chloride and polystyrene, applied in the field of composite materials, can solve the problems of strong surface effect, complicated steps, small particle size of nanoparticles, etc., and achieve uniform dispersion state. And stable, solve the effect of severe reunion

Inactive Publication Date: 2019-03-05
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the small particle size, large specific surface area, large surface energy and strong surface interaction of nanoparticles, they are easy to agglomerate and have poor dispersion.
Most of the surface modification methods of nanoparticles reported so far are complex in operation and cumbersome in steps, which brings inconvenience to the preparation of polymer-based nanocomposites.

Method used

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  • Polystyrene-vinyl benzyl dimethyl dodecyl ammonium chloride-titanium dioxide composite material and preparation method thereof
  • Polystyrene-vinyl benzyl dimethyl dodecyl ammonium chloride-titanium dioxide composite material and preparation method thereof
  • Polystyrene-vinyl benzyl dimethyl dodecyl ammonium chloride-titanium dioxide composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) Weigh 0.5g VDAC and 0.057g initiator KPS, dissolve them in 50mL deionized water, then weigh 10g monomer styrene, add them to a 250mL four-neck flask, stir and pre-emulsify at 700rpm for 2h, and obtain the pre-emulsified Emulsion, the pre-emulsion is added to the constant pressure dropping funnel for use;

[0047] (2) Add 0.5g TiO 2 Nanoparticles and 0.5g cationic monomer VDAC were dispersed in 50mL deionized water, and ultrasonically dispersed with a JY92-II N-type ultrasonic cell pulverizer. The set parameters were: power 600W, working time 3s, intermittent time 2s, ultrasonic in an ice bath environment 30min, obtain the ultrasonic dispersion liquid and join in the 250mL four-neck flask;

[0048] (3) Add 10 g of styrene to the ultrasonic dispersion in a 250 mL four-neck flask, emulsify in a water bath at room temperature for 0.5 h, set the stirring speed at 700 rpm, and start to heat up after 0.5 h; when the temperature reaches 70 ° C, weigh 0.057 g KPS, dissolve...

Embodiment 2

[0051] Preparation of polystyrene-titanium dioxide nanocomposite emulsion with cationic monomer VDAC as emulsifier: Weigh 0.6g VDAC, 0.057g initiator KPS, dissolve in 50mL deionized water, then weigh 10g monomer styrene, add to 250mL In the flask, stir the pre-emulsification at a speed of 700rpm for 2h, add the pre-emulsion to the constant pressure dropping funnel for use; then add 0.5g TiO 2 Nanoparticles and 0.4g cationic monomer VDAC were dispersed in 50mL deionized water, and ultrasonically dispersed with a JY92-II N-type ultrasonic cell pulverizer. The set parameters were: power 600W, working time 3s, intermittent time 2s, ultrasonic in an ice bath environment After 30 minutes, add the ultrasonic dispersion liquid into a 250mL four-necked flask; then weigh 10g of styrene, add it to a 250mL four-necked flask, pre-emulsify in a water bath at room temperature for 0.5h, set the stirring speed to 700rpm, and start to heat up after 0.5h; reach 70°C, weigh 0.057g KPS, dissolve i...

Embodiment 3

[0053] Preparation of polystyrene-titanium dioxide nanocomposite emulsion with cationic monomer VDAC as emulsifier: Weigh 0.4g VDAC, 0.057g initiator KPS, dissolve in 50mL deionized water, then weigh 10g monomer styrene, add to 250mL In the flask, stir the pre-emulsification at a speed of 700rpm for 2h, add the pre-emulsion to the constant pressure dropping funnel for use; then add 0.5g TiO 2 Nanoparticles and 0.6g cationic monomer VDAC were dispersed in 50mL deionized water, and ultrasonically dispersed with a JY92-II N-type ultrasonic cell pulverizer. The set parameters were: power 600W, working time 3s, intermittent time 2s, ultrasonic in an ice bath environment After 30 minutes, add the ultrasonic dispersion liquid into a 250mL four-necked flask; then weigh 10g of styrene, add it to a 250mL four-necked flask, pre-emulsify in a water bath at room temperature for 0.5h, set the stirring speed to 700rpm, and start to heat up after 0.5h; reach 70°C, weigh 0.057g KPS, dissolve i...

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Abstract

The invention discloses a polystyrene-vinyl benzyl dimethyl dodecyl ammonium chloride-titanium dioxide composite material and a preparation method thereof. The preparation method comprises the following steps: step 1, taking styrene (St) and vinyl benzyl dimethyl dodecyl ammonium chloride (VDAC) as comonomers, adding an initiator, and preparing a pre-emulsion, wherein the initiator and water forma water phase, the VDAC and the St are taken as an oil phase; step 2, taking the VDAC as a dispersing agent, pre-dispersing nano TiO2 in a water solution to obtain a TiO2 nano-ion dispersion liquid, and then adding the VDAC and an initiator to form an emulsion polymerization system, wherein the initiator, the nano TiO2 and water form a water phase, and the VDAC, and the St are taken as an oil phase; and step 3, heating the emulsion polymerization system to an initiation temperature, dropwise adding the pre-emulsion into the emulsion polymerization system, and carrying out stirring for emulsionpolymerization, so as to obtain the P(St-co-VDAC) / TiO2 copolymer emulsion. In the copolymer emulsion and copolymer microsphere powder, the nano titanium dioxide is dispersed in a nano scale, the dispersion state is uniform and stable, and a problem of serious agglomeration of nano particles in a polystyrene-titanium dioxide composite material is solved.

Description

technical field [0001] The present invention relates to the technical field of composite materials, in particular to a polystyrene (PS) composite material, especially a polystyrene (PS) composite material, in which a cationic monomer vinylbenzyl dimethyl dodecyl ammonium chloride (VDAC) is used as a matrix to with nano-titanium dioxide (TiO 2 ) to generate electrostatic interaction and steric hindrance interaction, promote the dispersion of titanium dioxide, and prepare PS-based nanocomposites. Background technique [0002] Polymer-based nanocomposites refer to composite materials that use polymers as the matrix and the size of the dispersed phase is less than 100 nm in at least one dimension. Polymer-based nanocomposites combine the advantages of polymers and nanomaterials, realize the optimization and complementarity in performance, and have broad research and application prospects. However, due to the small particle size, large specific surface area, large surface energ...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/14C08F2/44C08K3/22C08L25/08
CPCC08F212/08C08K3/22C08K2003/2241C08K2201/011C08F212/14C08F2/44C08L25/08
Inventor 郑俊萍丁永陈雨
Owner TIANJIN UNIV
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