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Composite foamed cement containing multi-walled carbon nanotubes and preparation method of composite foamed cement
The invention discloses composite foamed cement containing multi-walled carbon nanotubes and a preparation method of the composite foamed cement. The preparation method comprises the following steps:(1) putting multi-walled carbon nanotubes into a nitrating agent solution, ultrasonically stirring at 50-70 DEG C for 2-4 hours, washing to be neutral, and drying to obtain nitrified multi-walled carbon nanotubes; (2) adding the nitrified multi-walled carbon nanotubes into purified water, then adding a dispersing agent, and carrying out ultrasonic dispersion at 70-90 DEG C for 20-30 minutes to obtain a nitrified multi-walled carbon nanotube slurry; (3) adding polyvinyl alcohol and a catalyst into the nitrified multi-walled carbon nanotube slurry, stirring and reacting at 70-90 DEG C for 2-4 hours, filtering and drying to obtain polyvinyl alcohol modified multi-walled carbon nanotubes; and (4) adding the polyvinyl alcohol modified multi-walled carbon nanotubes into water, then adding sulphoaluminate cement, calcium stearate, lithium carbonate and hydrogen peroxide, performing high-speed shearing and stirring for 5-20 minutes, pouring the mixed slurry into a test mold, removing the moldafter 24 hours, and performing standard maintenance for 28 days, thereby obtaining the composite foamed cement containing the multi-walled carbon nanotubes. The comprehensive mechanical property of the foamed cement is remarkably improved.
本发明公开了一种含多壁碳纳米管的复合发泡水泥及其制备方法。所述的制备方法包含如下步骤：(1)将多壁碳纳米管放入硝化剂溶液中，在50～70℃下超声搅拌2～4h，洗涤至中性，干燥后得硝化多壁碳纳米管；(2)将硝化多壁碳纳米管加入纯净水中，然后再加入分散剂，在70～90℃下超声分散20～30min，得硝化多壁碳纳米管浆料；(3)往硝化多壁碳纳米管浆料中加入聚乙烯醇以及催化剂，在70～90℃下搅拌反应2～4h后，过滤干燥即得聚乙烯醇改性多壁碳纳米管；(4)将聚乙烯醇改性多壁碳纳米管加入水中，然后加入硫铝酸盐水泥、十八酸钙盐、碳酸锂以及过氧化氢，高速剪切搅拌5～20min，将混合浆倒入试模中，24小时后拆模，标准养护28天，即得所述的含多壁碳纳米管的复合发泡水泥。该发泡水泥的综合力学性能有了显著的提高。
Composite foamed cement containing multi-walled carbon nanotubes and preparation method of composite foamed cement
The invention discloses composite foamed cement containing multi-walled carbon nanotubes and a preparation method of the composite foamed cement. The preparation method comprises the following steps:(1) putting multi-walled carbon nanotubes into a nitrating agent solution, ultrasonically stirring at 50-70 DEG C for 2-4 hours, washing to be neutral, and drying to obtain nitrified multi-walled carbon nanotubes; (2) adding the nitrified multi-walled carbon nanotubes into purified water, then adding a dispersing agent, and carrying out ultrasonic dispersion at 70-90 DEG C for 20-30 minutes to obtain a nitrified multi-walled carbon nanotube slurry; (3) adding polyvinyl alcohol and a catalyst into the nitrified multi-walled carbon nanotube slurry, stirring and reacting at 70-90 DEG C for 2-4 hours, filtering and drying to obtain polyvinyl alcohol modified multi-walled carbon nanotubes; and (4) adding the polyvinyl alcohol modified multi-walled carbon nanotubes into water, then adding sulphoaluminate cement, calcium stearate, lithium carbonate and hydrogen peroxide, performing high-speed shearing and stirring for 5-20 minutes, pouring the mixed slurry into a test mold, removing the moldafter 24 hours, and performing standard maintenance for 28 days, thereby obtaining the composite foamed cement containing the multi-walled carbon nanotubes. The comprehensive mechanical property of the foamed cement is remarkably improved.
本发明公开了一种含多壁碳纳米管的复合发泡水泥及其制备方法。所述的制备方法包含如下步骤：(1)将多壁碳纳米管放入硝化剂溶液中，在50～70℃下超声搅拌2～4h，洗涤至中性，干燥后得硝化多壁碳纳米管；(2)将硝化多壁碳纳米管加入纯净水中，然后再加入分散剂，在70～90℃下超声分散20～30min，得硝化多壁碳纳米管浆料；(3)往硝化多壁碳纳米管浆料中加入聚乙烯醇以及催化剂，在70～90℃下搅拌反应2～4h后，过滤干燥即得聚乙烯醇改性多壁碳纳米管；(4)将聚乙烯醇改性多壁碳纳米管加入水中，然后加入硫铝酸盐水泥、十八酸钙盐、碳酸锂以及过氧化氢，高速剪切搅拌5～20min，将混合浆倒入试模中，24小时后拆模，标准养护28天，即得所述的含多壁碳纳米管的复合发泡水泥。该发泡水泥的综合力学性能有了显著的提高。
Composite foamed cement containing multi-walled carbon nanotubes and preparation method of composite foamed cement
一种含多壁碳纳米管的复合发泡水泥及其制备方法
HUANG GENGJIA (author) / HUANG ZHIHAI (author)
2020-10-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2015