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Magnelium base layer-shaped double-hydroxide ultraviolet barrier material used in anti-aging asphalt

A technology of double hydroxide and UV blocking, which is applied in the preparation of aging-resistant asphalt, and in the field of magnesium-aluminum-based double hydroxide UV-blocking materials for aging-resistant asphalt, which can solve the problems of poor UV aging resistance and improve the anti-aging UV aging performance, lower pass rate, good UV barrier effect

Active Publication Date: 2011-09-14
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Literature (Tu Juan, Yuan Jun, Bao Chuanping, Cheng Jian, UV aging research on road asphalt and modified asphalt, Petroleum Asphalt, 2008, 22 (6): 43-47) reported a kind of thermoplastic styrene-butadiene rubber (SBS ) for the preparation of aging-resistant asphalt. The results show that although SBS can greatly improve the performance of asphalt, the anti-ultraviolet aging ability of modified asphalt is similar to that of road asphalt, and even worse than that of road asphalt.

Method used

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  • Magnelium base layer-shaped double-hydroxide ultraviolet barrier material used in anti-aging asphalt
  • Magnelium base layer-shaped double-hydroxide ultraviolet barrier material used in anti-aging asphalt
  • Magnelium base layer-shaped double-hydroxide ultraviolet barrier material used in anti-aging asphalt

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Experimental program
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Effect test

Embodiment 1

[0020] MgCl 2 and AlCl 3 Mixed salt solution is formulated according to the ratio of Mg / Al=2, so that [Mg 2+ ]=1.5mol / L, NaOH and Na 2 CO 3 Press n(Na 2 CO 3 ) / n(Al 3+ )=2, n(NaOH) / [n(Mg 2+ )+n(Al 3+ )]=2.1 ratio is made into mixed alkali solution, two kinds of solutions are added to rotating liquid film reactor simultaneously, and the slurry obtained adds templating agent n-octane-sodium dodecylsulfonate, n-octane and dodecyl The addition of sodium sulfonate is 0.5% of the solid content of the slurry, the ratio of the amount of n-octane and sodium dodecylsulfonate is 1, then stir and heat to 80°C in the flask, and react for 1h after Washing, wet modification with 2% sodium carboxymethylcellulose, and drying to obtain a magnesium-aluminum-based layered double hydroxide UV barrier material for aging-resistant asphalt, the specific composition of which is: Mg 0.67 Al 0.33 (OH) 2 (CO 3 ) 0.17 0.6H 2 O, its particle size in the a and b directions is 0.2 μm, and the p...

Embodiment 2

[0023] MgSO 4 and Al 2 (SO 4 ) 3 Mixed salt solution is formulated according to the ratio of Mg / Al=3, so that [Mg 2+ ]=1.9mol / L, NaOH and Na 2 CO 3 Press n(Na 2 CO 3 ) / n(Al 3+ )=3, n(NaOH) / [n(Mg 2+ )+n(Al 3+ )]=2.4 ratio is made into mixed alkali solution, two kinds of solutions are added to rotating liquid membrane reactor simultaneously, and the slurry obtained adds templating agent n-octane-sodium dodecylsulfonate, n-octane and dodecyl The amount of sodium sulfonate added is 3% of the solid content of the slurry, and the ratio of the amount of n-octane to sodium dodecylsulfonate is 1.5, then stirred and heated to 100°C in a flask, and reacted for 10 hours. Washing, wet modification with 5% sodium lignosulfonate, and drying to obtain a magnesium-aluminum-based layered double hydroxide ultraviolet barrier material for aging-resistant asphalt, the specific composition of which is: Mg 0.75 Al 0.25 (OH) 2 (CO 3 ) 0.12 1.2H 2 O, its particle size in the a and b di...

Embodiment 3

[0026] MgNO 3 and Al(NO 3 ) 3 Mixed salt solution is formulated according to the ratio of Mg / Al=4, so that [Mg 2+ ]=1.0mol / L, NaOH and Na 2 CO 3 Press n(Na 2 CO 3 ) / n(Al 3+ )=1.5, n(NaOH) / [n(Mg 2+ )+n(Al 3+ )]=0.9 ratio is made into mixed alkali solution, two kinds of solutions are added to rotating liquid membrane reactor simultaneously, and the slurry obtained adds templating agent n-octane and sodium dodecylsulfonate, n-octane and dodecyl The amount of sodium sulfonate added is 4.5% of the solid content of the slurry, the ratio of n-octane to sodium dodecylsulfonate is 1, and then stirred and heated to 130°C in an autoclave, after 40 hours of reaction , after washing, wet modification with 5% petroleum sulfonate, and drying, the magnesium-aluminum-based layered double hydroxide UV barrier material for aging-resistant asphalt is obtained, and its chemical composition is: Mg 0.8 Al 0.2 (OH) 2 (CO 3 ) 0.1 1.8H 2 O, its particle size in the a and b directions is ...

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Abstract

The invention relates to a magnelium base layer-shaped double-hydroxide ultraviolet barrier material used in anti-aging asphalt and a preparation method thereof. The magnelium base layer-shaped double-hydroxide ultra-violet barrier material has a laminated structure formed by magnelium double-hydroxide plywoods and interlayer carbonate through multi-stage superposition, and molecular composition is as follows: Mg1-xAlx (OH) 2 (CO3) x / 2 . mH2O. The inorganic plywoods of the material can play a role in physically shielding ultraviolet rays, and metal elements on the plywoods and interlayer anions can play a role in chemically absorbing the ultraviolet rays; in addition, by controlling the size and number of layers of the plywoods, multi-stage reflection and refraction occur on interfaces of the plywoods when the ultraviolet rays pass through the multi-stage plywoods, and multi-stage absorption occurs on the plywoods and interlayers, so as to play a role in blocking the ultraviolet rays. Due to the multi-stage multiple chemical absorption and physical shielding effect, the material has good ultraviolet blocking effect, and remarkably improves the ultraviolet aging resistance of asphalt when the material is used for preparing the anti-aging asphalt.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of inorganic functional materials and ultraviolet aging-resistant asphalt, in particular to a magnesium-aluminum-based layered double hydroxide ultraviolet barrier material for aging-resistant asphalt, which is applied to the preparation of aging-resistant asphalt to improve asphalt UV aging resistance. technical background: [0002] As an important building material, asphalt is widely used in road construction, waterproofing materials and other fields. However, asphalt has poor UV aging resistance, and UV aging can easily cause damage to the molecular structure of asphalt, which in turn leads to cracks, rutting, potholes, spalling and other diseases on the asphalt pavement, which seriously affects the performance, service life and road safety of the asphalt pavement; Bitumen waterproof material becomes hard and brittle under the action of ultraviolet rays, and it is difficult to adapt to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/06
CPCC04B2103/605C04B22/06C04B2111/0075C04B26/26
Inventor 段雪史文颖卫敏林彦军吴少鹏余剑英
Owner BEIJING UNIV OF CHEM TECH
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