Enzymolysis xylogen or its derivative modified asphalt composite material, and preparation method thereof

A technology of enzymatically decomposing lignin and modifying asphalt, which is applied in the field of enzymatically decomposing lignin or its derivatives to modify asphalt composite materials and its preparation, can solve the problems of unsatisfactory aging resistance and achieve low manufacturing cost and easy improvement Sexual effect, the effect of simple preparation process

Active Publication Date: 2008-09-24
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of enzymatic lignin or its derivative modified asphalt and its preparation method, the raw material formula is scientific and reasonable, fully utilize the renewable biological resources, not only solve the problem of preparing polymer modified asphalt in the prior art The defect of agin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1

[0042] Heat 300 parts of Liaohe Oilfield AH-90 asphalt and 15 parts of Beijing Grease Chemical Co., Ltd. ethylene-vinyl acetate copolymer (EVA, in which the proportion of vinyl acetate is 19%) to 190°C, stir and mix evenly, then divide into five parts and load them separately Stainless steel container, one part of asphalt is not added with enzymatic hydrolysis lignin, and the other four parts of asphalt ethylene-vinyl acetate copolymer mixture are added with 5, 10, 15 and 20 300 mesh enzymatic lignin powder at 170℃. Stir and heat the mixed solution at 170-175°C and stir continuously for 60 minutes to dissolve and mix the enzymatically hydrolyzed lignin and asphalt evenly. Then separate the unmodified asphalt and four parts of the enzymatically hydrolyzed lignin-modified asphalt mixture. Coated on the surface of five glass sheets with a width of 5 cm and a length of 10 cm, numbered 0, 1, 2, 3 or 4, dried and cured at 80°C to form an asphalt coating film. Place th...

Example Embodiment

[0045] Example 2

[0046] 1) Preparation of enzymatic hydrolysis of lignin derivatives:

[0047] A. Take 21ml of epichlorohydrin and add it to a clean 250ml three-necked flask (container), weigh 5g of enzymatically hydrolyzed lignin, pour it into the flask container, heat to 50℃, stir for 30min, let the high boiling alcohol lignin Fully dissolve and mix with epichlorohydrin, add 0.8ml of 30% NaOH solution within 20 minutes, heat up to 55-60°C, stir and reflux for 1 hour, heat up to 70°C, add 2ml of 30% NaOH solution within 20 minutes , Stirring and refluxing for 1 hour, the excess epichlorohydrin was distilled off under reduced pressure to obtain a certain elastic brown solid, which was washed and dried to obtain 10.1 g of brittle brown solid enzymatically hydrolyzed lignin modified epoxy resin.

[0048] B. Weigh 5.5 grams of enzymatically hydrolyzed lignin and 3.1 grams of toluene diisocyanate (TDI) and dissolve them in 20ml of tetrahydrofuran, stir and heat to 60°C for one hour,...

Example Embodiment

[0054] Example 3:

[0055] Weigh 100 grams of rosin, 0.4 grams of magnesium oxide catalyst, and add 20 grams of enzymatic hydrolyzed lignin, and react for 5 hours under nitrogen protection at a temperature of 235°C to obtain an enzymatically hydrolyzed lignin modified rosin resin with a softening point of 99.3°C. . Heat 100 parts of Liaohe Oilfield AH-90 asphalt to 160℃, divide into two parts and put them into stainless steel containers. One part of asphalt is not added with enzymatic lignin, and the other part of asphalt is added with 10 parts of enzymatic lignin modified rosin. , Stir and heat the mixed solution at a heating temperature of 160-165°C and continuously stir for 60 minutes to dissolve and mix the enzymatically hydrolyzed lignin rosin resin and asphalt evenly, cool to room temperature, and measure its penetration according to the corresponding industry standards (JTJ036- 98), softening point (ASTMD36-26) and elongation (Asphalt and Asphalt Mixture Test Procedure T060...

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Abstract

The present invention provides an enzymolysis lignin or enzymolysis derivant modified asphalt composite material and a preparation method. The raw materials include the enzymolysis lignin or the enzymolysis lignin derivant, the asphalt and other modification assistant agents. The preparation steps: the enzymolysis lignin or the enzymolysis lignin derivant, other modification assistant agents and filling agent are mixed in advance to the melted asphalt substrate to be uniformly mixed, and then the mixture is displaced for solidification. The present invention makes full use of the renewable living resource, and not only resolves the problem of the present polymer modified asphalt that depends on the synthesis of the petrochemical raw materials, but also can reduced the use cost of the polymer modified asphalt; appropriate enzymolysis additive can be selected according to different requirements of the modified asphalt product to substitute partial petrochemical raw materials, thus improving the anti-aging performance of the polymer asphalt product; moreover, the craftwork is simple and is easy to implement, thereby can reduce the production cost and improve the competition strength of the product.

Description

technical field [0001] The invention belongs to the field of asphalt materials for roads and bridge decks, and more specifically relates to an enzymatically hydrolyzed lignin or its derivative modified asphalt composite material and a preparation method thereof. Background technique: [0002] Ordinary road asphalt has poor temperature change performance, poor elasticity and aging resistance due to its own composition and structure. performance. Various countries in the world have carried out extensive research and application on modified asphalt technology, which has become a hot spot of road materials. Through the comparison and accumulation of a large number of engineering practices at home and abroad, due to the good compatibility between polymer and asphalt, the excellent performance of polymer modified asphalt has emerged. It is clearly stipulated in relevant technical specifications such as knot layer that polymer modified asphalt must be used. my country's economic...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/38
Inventor 程贤甦
Owner FUZHOU UNIVERSITY
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