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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 aging resistance is not ideal, and it can reduce the cost of production and use of asphalt modified by synthesizing polymers from petrochemical raw materials; the prepared modified asphalt product has good modification effect, superior performance, and the preparation process is simple and easy Implementation is conducive to industrialized mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Heat 300 parts of Liaohe Oilfield AH-90 bitumen and 15 parts of ethylene-vinyl acetate copolymer (EVA, the proportion of vinyl acetate is 19%) of Beijing Oil Chemical Co., Ltd. to 190°C, stir and mix evenly, divide into five parts and load them separately Stainless steel container, one part of asphalt without adding enzymatic lignin, and the other four parts of asphalt ethylene-vinyl acetate copolymer mixture were added with 5 parts, 10 parts, 15 parts and 20 parts of 300 mesh enzymatic lignin powder at 170 ° C, Stir the mixed solution and heat it. The heating temperature is 170-175°C, and keep stirring for 60 minutes to dissolve and mix the enzymatic lignin and asphalt evenly. 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 at 80°C, and cured to form an asphalt coating film. Put the five asphalt-coated glass sheets in a rapid aging device with a temperature of 65°C (with a temperature difference of p...

Embodiment 2

[0046] 1) Preparation of enzymatic lignin derivatives:

[0047] A. Take 21ml of epichlorohydrin, add it to a clean 250ml three-neck flask (in the container), weigh 5 grams of enzymatic lignin, pour it into the flask container, heat up to 50°C, stir for 30min, and let the high boiling alcohol lignin Fully dissolve and mix with epichlorohydrin, add 0.8ml of 30% NaOH solution within 20 minutes, raise the temperature to 55-60°C, stir and reflux for 1 hour, raise the temperature to 70°C, and add 2ml of 30% NaOH solution within 20 minutes , and then stirred and refluxed for 1 hour, and the excess epichlorohydrin was evaporated under reduced pressure to obtain a certain elastic brown solid, which was washed and dried to obtain 10.1 grams of brittle brown solid enzymolysis lignin-modified epoxy resin.

[0048] B. Weigh 5.5 grams of enzymatic 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, then add 14....

Embodiment 3

[0055] Weigh 100 grams of rosin, 0.4 grams of magnesium oxide catalyst, add 20 grams of enzymatic lignin, and react for 5 hours under nitrogen protection at 235 °C to obtain an enzymatic lignin-modified rosin resin with a softening point of 99.3 °C . Heat 100 parts of Liaohe Oilfield AH-90 asphalt to 160°C, divide it into two parts and put them into stainless steel containers, one part of the asphalt is not added with enzymatic lignin, and the other part is added with 10 parts of enzymatic lignin modified rosin , stir the mixed solution and heat, the heating temperature is 160-165 ℃, and keep stirring for 60 minutes, so that the enzymatic lignin rosin resin and asphalt are dissolved and mixed evenly, cooled to room temperature, and the penetration is measured according to the corresponding industry standards (JTJ036- 98), softening point (ASTMD36-26) and elongation (asphalt and asphalt mixture test procedure T0602), the results are listed in Table 3.

[0056] Table 3. Perform...

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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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