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Siloxane-modified super-hydrophobic geopolymer anticorrosive material and preparation method thereof

A technology of siloxane modification and polymer, applied in cement production, etc., can solve the problems of limited service life of organic waterproof coating, difficulty in achieving long-term hydrophobic effect, poor bonding performance, etc., to achieve super hydrophobicity and high durability Corrosion performance, promotion of rapid development, and short production cycle

Active Publication Date: 2020-12-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this organic waterproof coating has a limited service life, poor bonding performance with building materials, and it is difficult to achieve long-term hydrophobic effect

Method used

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  • Siloxane-modified super-hydrophobic geopolymer anticorrosive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A siloxane-modified superhydrophobic geopolymer anti-corrosion material, including 45 parts of metakaolin, 20 parts of fly ash, 10 parts of silica fume, 15 parts of sodium hydroxide solid, 50 parts of sodium silicate solution, deionized 18 parts of water, 2 parts of polydimethylsiloxane, 5 parts of methyl hydrogen silicone oil, 0.1 part of silane coupling agent, 5 parts of nano magnesium hydroxide powder, 10 parts of nano silicon dioxide powder, 2 parts of silicon carbide fiber , 2 parts of basalt fiber, 1 part of calcium lignosulfonate, and 1 part of grinding aid.

[0029] SiO in sodium silicate solution 2 with Na 2 The molar mass ratio of O is 3; the viscosity of polydimethylsiloxane is 100 Stokes; the average particle diameter of nano-magnesium hydroxide powder is 35 nanometers; the average particle diameter of nano-silica powder is 15 nanometers; silicon carbide fiber The average diameter is 20 microns, and the average length is 6 mm; the average diameter of basal...

Embodiment 2

[0038] A siloxane-modified superhydrophobic geopolymer anti-corrosion material, including 50 parts of metakaolin, 15 parts of fly ash, 10 parts of silica fume, 18 parts of sodium hydroxide solid, 48 parts of sodium silicate solution, deionized 15 parts of water, 2.5 parts of polydimethylsiloxane, 5 parts of methyl hydrogen silicone oil, 0.15 parts of silane coupling agent, 6 parts of nano magnesium hydroxide powder, 8 parts of nano silicon dioxide powder, 2 parts of silicon carbide fiber , 1 part of carbon fiber, 1 part of calcium lignosulfonate, and 1 part of grinding aid.

[0039] SiO in sodium silicate solution 2 with Na 2 The molar mass ratio of O is 3.5; the viscosity of polydimethylsiloxane is 50 Stokes; the average particle diameter of nano magnesium hydroxide powder is 40 nanometers; the average particle diameter of nano silicon dioxide powder is 20 nanometers; silicon carbide fiber The average diameter is 20 microns, and the average length is 6 mm; the average diame...

Embodiment 3

[0048] SiO in sodium silicate solution 2 with Na 2 The molar mass ratio of O is 3; a siloxane-modified superhydrophobic geopolymer anti-corrosion material, including 55 parts of metakaolin, 15 parts of fly ash, 10 parts of silica fume, 20 parts of sodium hydroxide solid, silicon 50 parts of sodium acid solution, 15 parts of deionized water, 3 parts of polydimethylsiloxane, 5 parts of methyl hydrogen-containing silicone oil, 0.2 parts of silane coupling agent, 6 parts of nano-magnesium hydroxide powder, and nano-silica powder 10 parts, 1 part of silicon carbide fiber, 1 part of basalt fiber, 1 part of carbon fiber, 1.5 parts of calcium lignosulfonate, and 1 part of grinding aid.

[0049] The viscosity of polydimethylsiloxane is 50 Stokes; the average particle size of nano-magnesium hydroxide powder is 40 nm; the average particle size of nano-silica powder is 25 nm; the average diameter of silicon carbide fibers is 20 microns, and the average length The average diameter of bas...

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Abstract

The invention discloses a siloxane-modified super-hydrophobic geopolymer anticorrosive material which comprises the following raw materials, by weight: 70-90 parts of a silicon-aluminum mineral raw material, 75-100 parts of an alkali activator, 2-3 parts of polydimethylsiloxane, 4-5 parts of methyl hydrogen-containing silicone oil, 0.1-0.2 part of a silane coupling agent, 4-6 parts of nano magnesium hydroxide powder, 7-10 parts of nano silicon dioxide powder, 3-5 parts of short fibers, 1-2 parts of calcium lignosulphonate and 1-1.5 parts of a grinding aid. The invention also discloses a preparation method of the siloxane modified super-hydrophobic geopolymer anticorrosive material. According to the invention, a method of combining siloxane with matrix and surface super-hydrophobic modification is utilized, and matrix surface chemical structure modification and nanoscale and micron-scale roughness modification are combined, so that the super-hydrophobic and high-corrosion-resistance properties of the compact high-strength geopolymer material are improved; the raw materials, the nano material and the short fibers are added, so that the material is high in strength, compact in structure and high in durability, and the resistance of the material to ion erosion, substance dissolution, freeze-thaw damage and the like is achieved through super-hydrophobic modification.

Description

technical field [0001] The invention belongs to the technical field of new building materials, and in particular relates to a siloxane-modified superhydrophobic geopolymer anticorrosion material and a preparation method thereof. Background technique [0002] With the improvement of the national engineering level, the wading engineering buildings represented by marine engineering have developed rapidly. However, because wading buildings are in continuous contact with the water environment and are subject to long-term destructive effects of wind, waves, and currents, it is difficult for ordinary cement-based building materials to achieve ideal results in terms of durability. As a new green and environmentally friendly building material, geopolymers have attracted extensive research by scholars around the world due to their excellent performance characteristics such as rapid and controllable coagulation and hardening, high strength and adhesion, and strong durability. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/42C04B111/27
CPCC04B24/42C04B28/006C04B2111/27C04B2201/50C04B14/106C04B18/08C04B18/146C04B22/062C04B12/04C04B22/002C04B22/066C04B14/062C04B14/38C04B14/4643C04B24/18C04B2103/52C04B16/0691C04B14/386Y02P40/10
Inventor 闫东明阮圣倩陈士堃朱嵘华刘毅田野
Owner ZHEJIANG UNIV
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