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Preparation of Lignosulfonate Sodium and Sodium Acrylate Graft Copolymer and Its Dust Suppressant Performance
  
DOI：10.11980/j.issn.0254-508X.2019.06.007
Key Words:lignosulfonate sodium  graft copolymer  sodium acrylate  anti-wind erosin performance  dust suppression performance
Fund Project:国家自然科学基金(31700515)；天津市级大学生创新创业训练计划项目(201810057157)。
Author NameAffiliation
ZHANG Jiayin1 1. Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 
WANG Guanhua1，* 1. Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 
HANG Jiahui1 1. Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 
XU Li1 1. Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 
JIN Mengchen1 1. Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 
MA Yanming2 2.Tangshan Ruoshui Ecology & Pollution Control Technology Co.， Ltd.， Tangshan， Hebei Province， 063000 
SI Chuanling1 1. Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 
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Abstract:An orthogonal design was applied to optimize lignosulfonate sodium(Ls-Na) grafting copolymerization with sodium acrylate(SAA). The lignosulfonate graft copolymer(Ls-Na-SAA) was characterized by FT-IR， SEM and TGA. The results showed that sodium acrylate was grafted onto the lignosulfonate sodium successfully and the graft copolymer exhibited enhanced thermal stability. Under the optimized grafting conditions(temperature 65℃， reaction time 3 h， neutralization degree 60% and initiator concentration 10%)， the performances of Ls-Na and Ls-Na-SAA as dust suppressants were analyzed and compared. The results indicated that the water retention capacity of Ls-Na-SAA was basically unchanged after the grafting， its compression strength increased from 37.0 kPa to 455.6 kPa when the mass fraction of spraying was 2.5% and the sand loss rate decreased from 25.2% to 3.1% when the mass fraction of spraying was 1.5%. After grafting copolymerization， Ls-Na-SAA formed a reticular cross linking structure and more binding layers among the sand particles. These features contributed to the improved compressive strength and anti-wind erosion performance of Ls-Na-SAA.
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