Preparation method and application of modified nano calcium carbonate through MMA in-situ polymerization

A nano-calcium carbonate, in-situ polymerization technology, applied in the direction of climate sustainability, sustainable manufacturing/processing, chemical industry, etc., can solve the problems of reducing the mechanical properties and influence of polymer composites, and improve the hydrophobic and lipophilic properties. , the effect of improving durability

Active Publication Date: 2021-12-03
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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  • Preparation method and application of modified nano calcium carbonate through MMA in-situ polymerization
  • Preparation method and application of modified nano calcium carbonate through MMA in-situ polymerization
  • Preparation method and application of modified nano calcium carbonate through MMA in-situ polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0030]2. Preparation:

[0031] (1) Add sodium benzenesulfonate (NaSS), polyvinylpyrrolidone (PVP), azobisisobutyronitrile (AlBN) and methyl methacrylate (MMA) to the two mixed phase solvents at 70 o C under stirring for 3h to obtain mixture A;

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

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

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

[0035] (5) CaCO 3 @PMMA...

Embodiment 2

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

[0047] 2. Preparation:

[0048] (1) Add sodium benzenesulfonate (NaSS), polyvinylpyrrolidone (PVP), azobisisobutyronitrile (AlBN) and methyl methacrylate (MMA) to the two mixed-phase solvents at 75 o C under stirring for 3h to obtain mixture A;

[0049] (2) Add nano-calcium carbonate slurry and stearic acid reagent to mixture A, and continue to mix at 75 o C under stirring for 5h to obtain mixture B;

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

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

[0052] (5) CaCO 3 ...

Embodiment 3

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

[0064] 2. Preparation:

[0065] (1) Add sodium benzenesulfonate (NaSS), polyvinylpyrrolidone (PVP), azobisisobutyronitrile (AlBN) and methyl methacrylate (MMA) to the two mixed phase solvents at 80 o C under stirring for 3h to obtain mixture A;

[0066] (2) Add nano-calcium carbonate slurry and stearic acid reagent to mixture A, and continue to o C under stirring for 5h to obtain mixture B;

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

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

[0069] (5) CaCO 3 @PMMA / ...

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Abstract

The invention discloses a preparation method and application of modified nano calcium carbonate through MMA in-situ polymerization. The preparation method comprises steps: firstly, subjecting nano calcium carbonate slurry to uniform polymerization reaction in an MMA monomer solution by adopting a two-phase mixed solution method, secondly, filling slurry CaCO3@PMMA modified by utilizing MMA into a PVDF matrix, and then preparing a CaCO3@PMMA / PVDF composite material by adopting a water vapor induced phase separation method (WVIPs); and carrying out hot pressing to obtain the block-shaped CaCO3@PMMA / PVDF composite material. The hydrophobic and oleophylic properties of the nano calcium carbonate are effectively improved through in-situ polymerization modification, and after hot pressing, the modified calcium carbonate can be dissolved in the matrix PVDF while keeping the original distribution state and is tightly combined with the matrix, so that the durability of the CaCO3@PMMA / PVDF composite material is improved. The preparation method comprises the following steps: preparing CaCO3@PMMA by using an MMA in-situ polymerization modification and two-phase solution mixing method, then uniformly distributing the modified powdery CaCO3@PMMA composite material in a PVDF matrix by using a water vapor induced phase separation method, and finally preparing the blocky CaCO3@PMMA / PVDF composite material by using a hot pressing method.

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 that is most widely used and has 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 as an inorganic green and environmental protection filler in the fields of rubber, plastics, papermaking, coatings, and inks. Ordinary CaCO 3 As a filler, it only plays the role of compatibilization and cost reduction, while nano-CaCO 3 It can not only increase the volume and reduce the cost, but also has a reinforcing effect, which can be used to improve the mechanical properties such as the strength and modulus of the matrix, and achieve the purpose of toughe...

Claims

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Application Information

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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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