A kind of preparation method and application of nanometer calcium carbonate modified by mma in-situ polymerization

A technology of nano-calcium carbonate and polymerization reaction, applied in the direction of climate sustainability, sustainable manufacturing/processing, chemical industry, etc., can solve the problems of affecting and reducing the mechanical properties of polymer composite materials, so as to improve durability and improve hydrophobicity The effect of lipophilic properties

Active Publication Date: 2022-06-03
中科乐美科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does improve the mechanical properties of PVC plastics, but due to the application of surfactants, the residual active agents remain in the calcium carbonate slurry, which affects and restricts the surface active components of polymer plastics and reduces the mechanical properties of polymer composites. performance

Method used

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  • A kind of preparation method and application of nanometer calcium carbonate modified by mma in-situ polymerization
  • A kind of preparation method and application of nanometer calcium carbonate modified by mma in-situ polymerization
  • A kind of preparation method and application of nanometer calcium carbonate modified by mma in-situ polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Ingredients: PVDF 94.5wt%; powdered CaCO 3 @PMMA composite 5.5wt%.

[0030]2. Preparation:

[0031] (1) Sodium benzenesulfonate (NaSS), polyvinylpyrrolidone (PVP), azobisisobutyronitrile (AlBN), and methyl methacrylate (MMA) were added to the two mixed phase solvents at 70 o Mixture A was obtained by stirring at C for 3h;

[0032] (2) Add nano calcium carbonate slurry and stearic acid reagent to mixture A, continue at 70 o Mixture B was obtained by stirring at C for 5h;

[0033] (3) Pour the mixture B cooled to room temperature into a centrifuge tube and centrifugally filter to obtain the precipitate as CaCO 3 Composites of @PMMA, followed at 60 o Dry at C for 18h to obtain powdery CaCO 3 @PMMA composite;

[0034] (4) The dried powdered CaCO 3 @PMMA composites, polyvinylidene fluoride (PVDF) particles were added to organic solvents, and CaCO was prepared by water-gas phase separations (WVIPs) 3 @PMMA / PVDF composite material;

[0035] (5) The CaCO 3 The @PM...

Embodiment 2

[0046] 1. Ingredients: PVDF 90wt%; powdered CaCO 3 @PMMA composite 10wt%.

[0047] 2. Preparation:

[0048] (1) Sodium benzenesulfonate (NaSS), polyvinylpyrrolidone (PVP), azobisisobutyronitrile (AlBN), and methyl methacrylate (MMA) were added to the two mixed phase solvents at 75 o Mixture A was obtained by stirring at C for 3h;

[0049] (2) Add nano calcium carbonate slurry and stearic acid reagent to mixture A, continue at 75 o Mixture B was obtained by stirring at C for 5h;

[0050] (3) Pour the mixture B cooled to room temperature into a centrifuge tube and centrifugally filter to obtain the precipitate as CaCO 3 Composites of @PMMA, followed at 65 o Dry at C for 18h to obtain powdery CaCO 3 @PMMA composite;

[0051] (4) The dried powdered CaCO 3 @PMMA composites, polyvinylidene fluoride (PVDF) particles were added to organic solvents, and CaCO was prepared by water-gas phase separations (WVIPs) 3 @PMMA / PVDF composite material;

[0052] (5) The CaCO 3 The @PMMA...

Embodiment 3

[0063] 1. Ingredients: PVDF 85.5wt%; powdered CaCO 3 @PMMA composite 14.5wt%.

[0064] 2. Preparation:

[0065] (1) Sodium benzenesulfonate (NaSS), polyvinylpyrrolidone (PVP), azobisisobutyronitrile (AlBN), and methyl methacrylate (MMA) were added to the two mixed phase solvents at 80 o Mixture A was obtained by stirring at C for 3h;

[0066] (2) Add nano calcium carbonate slurry and stearic acid reagent to mixture A, continue at 80 o Mixture B was obtained by stirring at C for 5h;

[0067] (3) Pour the mixture B cooled to room temperature into a centrifuge tube and centrifugally filter to obtain the precipitate as CaCO 3 Composites of @PMMA, followed at 70 o Dry at C for 18h to obtain powdery CaCO 3 @PMMA composite;

[0068] (4) The dried powdered CaCO 3 @PMMA composites, polyvinylidene fluoride (PVDF) particles were added to organic solvents, and CaCO was prepared by water-gas phase separations (WVIPs) 3 @PMMA / PVDF composite material;

[0069] (5) The CaCO 3 The @...

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PUM

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Abstract

The invention discloses a preparation method and application of nano-calcium carbonate modified by in-situ polymerization of MMA. Firstly, a two-phase mixed solution method is used to uniformly polymerize nano-calcium carbonate slurry in MMA monomer solution, and secondly, the modified nano-calcium carbonate slurry is modified by MMA. After curing the slurry CaCO 3 @PMMA was filled into a PVDF matrix, followed by water vapor-induced phase separation (WVIPs) to prepare CaCO 3 @PMMA / PVDF composite material, made of bulk CaCO after hot pressing 3 @PMMA / PVDF composite. In-situ polymerization modification can effectively improve the hydrophobic and lipophilic properties of nano-calcium carbonate, and after hot pressing, the modified calcium carbonate can be dissolved in the matrix PVDF while maintaining the original distribution state, and closely combined with the matrix to improve the CaCO 3 Durability of @PMMA / PVDF composites. The present invention utilizes MMA in-situ polymerization modification and two-phase solution mixing method to prepare CaCO 3 @PMMA, followed by steam-induced phase separation to make modified powdered CaCO 3 The @PMMA composite is uniformly distributed in the PVDF matrix, and finally the bulk CaCO is produced by hot pressing 3 @PMMA / PVDF composite.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, in particular to a method for preparing nano-calcium carbonate modified by in-situ polymerization of MMA and its application in PVDF plastics. Background technique [0002] Nano-calcium carbonate is a new type of functional nano-scale filler with the most extensive application and the best performance in the field of industrial technology. Due to its low price, wide range of raw materials, and non-toxicity, it is widely used in rubber, plastic, paper, paint, ink and other fields as an inorganic green environmental protection filler. Ordinary CaCO 3 It is used as filler only for compatibilization and cost reduction, while nano-CaCO 3 It can not only play the role of compatibilization and reduce costs, but also has a reinforcing effect, which can be used to improve the mechanical properties such as the strength and modulus of the matrix to achieve the purpose of toughening and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08K3/26C08K9/10C08F120/14
CPCC08K3/26C08K9/10C08F120/14C08K2003/265C08K2201/011C08L27/16Y02P20/10
Inventor 田兴友张海宝李潇潇王化孙俊刘研研胡坤袁云袁丽曹宇翔高丽
Owner 中科乐美科技集团有限公司
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