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A platform for research: civil engineering, architecture and urbanism
Modified lignin concrete air entraining agent and preparation method thereof
The invention belongs to the field of concrete admixtures, and particularly discloses a modified lignin concrete air entraining agent and a preparation method thereof. The modified lignin concrete airentraining agent is obtained by firstly performing oxidative degradation on natural polymer material that is lignin, then performing sulfitation modification, and finally performing graft modification on the modified lignin through allyl alcohol polyoxyethylene ether. According to the invention, the natural polymer material lignin is selected as a base material and is subjected to oxidative degradation, sulfitation and free radical graft polymerization modification on allyl alcohol polyoxyethylene ether under the catalysis of enzyme to obtain the air entraining agent with good adaptability. The preparation process is free of pollution, the conversion rate is high, the cost is low, the cost performance is high, the compatibility with a water reducing agent is good, the doping amount is small, and the foaming and air entraining effects are good.
本发明属于混凝土外加剂领域，具体公开了一种改性木素混凝土引气剂及其制备方法，首先对天然高分子材料木素进行氧化降解，然后对其进行亚硫酸化改性，最后对其通过烯丙醇聚氧乙烯醚的接枝改性，得到了改性木素混凝土引气剂。本发明选用了天然高分子材料木素作为基础材料，对其进行氧化降解、亚硫酸化和酶催化烯丙醇聚氧乙烯醚的自由基接枝聚合改性，制备得到了具有适应性好的引气剂，制备过程没有污染，且转化率高，成本低，性价比高，且与减水剂有很好的相容性，掺量少，发泡、引气效果好。
Modified lignin concrete air entraining agent and preparation method thereof
The invention belongs to the field of concrete admixtures, and particularly discloses a modified lignin concrete air entraining agent and a preparation method thereof. The modified lignin concrete airentraining agent is obtained by firstly performing oxidative degradation on natural polymer material that is lignin, then performing sulfitation modification, and finally performing graft modification on the modified lignin through allyl alcohol polyoxyethylene ether. According to the invention, the natural polymer material lignin is selected as a base material and is subjected to oxidative degradation, sulfitation and free radical graft polymerization modification on allyl alcohol polyoxyethylene ether under the catalysis of enzyme to obtain the air entraining agent with good adaptability. The preparation process is free of pollution, the conversion rate is high, the cost is low, the cost performance is high, the compatibility with a water reducing agent is good, the doping amount is small, and the foaming and air entraining effects are good.
本发明属于混凝土外加剂领域，具体公开了一种改性木素混凝土引气剂及其制备方法，首先对天然高分子材料木素进行氧化降解，然后对其进行亚硫酸化改性，最后对其通过烯丙醇聚氧乙烯醚的接枝改性，得到了改性木素混凝土引气剂。本发明选用了天然高分子材料木素作为基础材料，对其进行氧化降解、亚硫酸化和酶催化烯丙醇聚氧乙烯醚的自由基接枝聚合改性，制备得到了具有适应性好的引气剂，制备过程没有污染，且转化率高，成本低，性价比高，且与减水剂有很好的相容性，掺量少，发泡、引气效果好。
Modified lignin concrete air entraining agent and preparation method thereof
一种改性木素混凝土引气及其制备方法
LYU SHENGHUA (author) / LIU XIANG (author) / GAO DANGGUO (author) / LI NINGGUO (author) / YANG ZHEN (author)
2020-06-26
Patent
Electronic Resource
Chinese
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08H
DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
,
Derivate von natürlichen makromolekularen Verbindungen
/
C12P
FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
,
Gärungsverfahren oder Verfahren unter Verwendung von Enzymen zur gezielten Synthese von chemischen Verbindungen oder Zusammensetzungen oder zur Trennung optischer Isomerer aus einer racemischen Mischung
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