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Durable polysilsesquioxane nano hybrid super-hydrophobic leather coating layer and preparation method thereof

A polysilsesquioxane and durability technology, which is applied in the field of preparation of durable polysilsesquioxane nano-hybrid superhydrophobic leather coatings, can solve problems such as lack of application methods, achieve improved friction resistance, The effect of easy availability of raw materials and simple preparation process

Active Publication Date: 2017-07-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on the application of polysilsesquioxane (PSQ) in this field is still lacking.

Method used

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  • Durable polysilsesquioxane nano hybrid super-hydrophobic leather coating layer and preparation method thereof
  • Durable polysilsesquioxane nano hybrid super-hydrophobic leather coating layer and preparation method thereof
  • Durable polysilsesquioxane nano hybrid super-hydrophobic leather coating layer and preparation method thereof

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preparation example Construction

[0033] A preparation method of durable polysilsesquioxane nano-hybrid superhydrophobic leather coating, comprising the following steps:

[0034] Step 1: Add aminosilane and isopropanol with a mass ratio of 5:1 into the reaction kettle, heat to 65°C, and stir for half an hour; add maleic anhydride in 5 batches, and the molar ratio of maleic anhydride to aminosilane is 1.1: 1. After the dropwise addition, keep the temperature for 3 hours, and the reaction is completed, and the carboxylated silane monomer (CTES) is obtained;

[0035] Step 2: Add sodium lauryl sulfate, AEO-3, NaOH catalyst and distilled water into the reaction kettle, stir at 15-25°C for 60 minutes; then slowly add methylsilane monomer dropwise at a rate of 20 drops / min, Continue to stir for 1.5-2.5 hours after dropping, then add carboxylated silane monomer (CTES) dropwise at the same dropping speed, and keep warm for 12 hours after dropping to prepare anionic narrowly dispersed polycarboxy / methylsilsesquioxane (...

Embodiment 1

[0050] (1) Add 20g of KH550 and 4g of isopropanol into the reaction kettle in sequence, heat to 65°C, and stir for 30 minutes. Then, start to add 9.8g maleic anhydride in 5 batches, after the dropwise addition is completed, keep the temperature for 3 hours, and the reaction is completed, and the carboxylated silane monomer (CTES) is obtained;

[0051] (2) Accurately weigh 3.8g sodium lauryl sulfate, 3.8g AEO-3, 4.5g NaOH and 1500g distilled water, add them into the reaction kettle, and stir at room temperature (25°C) for 60min. Then, start to slowly add 120g of methylsilane monomer (MTES) dropwise, control the drop rate (20 drops / min), continue to stir for 2.0h after the drop, and then start to drop the carboxyl group prepared in step (1) at the same drop rate Silane monomer (CTES), after dropping, keep warm for 12 hours to prepare anionic narrowly dispersed polycarboxy / methylsilsesquioxane (PCMSQ) nanosphere hybrid emulsion (average particle size is 106.9nm, PDI is 0.20);

...

Embodiment 2

[0057] (1) Add 20g of aminopropyltrimethoxysilane and 4g of isopropanol into the reaction kettle in sequence, heat to 65°C, and stir for 30min. Then, start to add 12.0 g of maleic anhydride in 5 batches, after the dropwise addition is completed, keep the temperature for 3 hours, and the reaction is completed, and the carboxylated silane monomer (CTES) is obtained;

[0058] (2) Accurately weigh 7.4g sodium lauryl sulfate, 7.4g AEO-3, 3.2g NaOH and 1920g distilled water, add them into the reaction kettle, and stir at room temperature (25°C) for 60min. Then, start to slowly add 128g of methylsilane monomer (MTMS) dropwise, control the drop rate (20 drops / min), continue to stir for 2.0h after the drop, and then start to drop the carboxyl group prepared in step (1) at the same drop rate Silane monomer (CTES), after dripping, keep warm for 12 hours to prepare anionic narrowly dispersed polycarboxy / methylsilsesquioxane (PCMSQ) nanosphere hybrid emulsion (average particle size is 66.9...

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Abstract

The invention relates to a durable polysilsesquioxane nano hybrid super-hydrophobic leather coating layer and a preparation method thereof. The method comprises the steps: firstly preparing an anionic narrow-dispersion polycarboxyl / methyl silsesquioxane (PCMSQ) nanosphere hybrid emulsion by emulsion polymerization, and then with epoxy silane, the PCMSQ emulsion and hydrophobic amino silicone as construction elements, carrying out layer-by-layer self-assembly on the surface of leather to construct the durable wearproof super-hydrophobic hybrid coating layer by using strong electrostatic interaction between -COO- of the surface of the PCMSQ and protonated -NH3<+> of amino silicone. At the same time, the anti-friction performance of the super-hydrophobic hybrid coating layer is improved by the effect of epoxy silane and the skin fiber matrix. The preparation method has the advantages of easily obtained used raw materials, simple and feasible preparation process, green environmental protection, and preparation of membranes in a large area; the prepared super-hydrophobic coating layer not only can endow the leather matrix with excellent super-hydrophobic properties but also can have good anti-friction performance.

Description

technical field [0001] The invention belongs to the technical field of leather finishing, and in particular relates to a method for preparing a durable polysilsesquioxane nano-hybrid superhydrophobic leather coating. In the method, a durable polysilsesquioxane is prepared on the leather surface through layer-by-layer self-assembly technology. Semisiloxane nanohybrid superhydrophobic coating. Background technique [0002] In recent years, superhydrophobic functional leather has become one of the important directions for the development of the leather industry because of its high added value, which can significantly improve the grade of products and market competitiveness. In practice, super-hydrophobic leather not only pursues excellent super-hydrophobic performance, but also has comprehensive functions such as hygienic air permeability, water vapor permeability, wear resistance, wearing comfort, and weather resistance. How to solve the durability, hygienic and air permeabil...

Claims

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Application Information

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IPC IPC(8): C09D183/08C09D183/06C09D183/04C14C11/00
CPCC09D4/00C09D183/04C14C11/003C08G77/14C08G77/26
Inventor 郝丽芬张娜尹娟娟崔聪聪张含
Owner SHAANXI UNIV OF SCI & TECH
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