This study aims to make full use of the agricultural waste peanut shells to lower material costs and achieve cleaner production at the same time.Cellulose nanofibrils(CNF)extracted from peanut shells were mixed with acrylic acid(AA)and dimethyl diallyl ammonium chloride(DMDAAC)to prepare a new type of capsule core(dust suppressant).Then,the self-adaptive AA-DM-CNF/CA microcapsules were prepared under the action of calcium alginate.The infrared spectroscopy and X-ray diffraction analysis results suggest that AA,DMDAAC and CNF have experienced graft copolymerization which leads to the formation of an amorphous structure.The scanning electron microscopy analysis results demonstrate that the internal dust suppressant can expand and break the wall after absorbing water,featuring a self-adaptive function.Meanwhile,the laser particle size analysis results show that the microcapsules,inside which the encapsulated dust suppressant can be observed clearly,maintain a good shape.The pro-duct performance experimental results reveal that the capsule core and the capsule wall achieve syner-gistic dust suppression,thus lengthening the dust suppression time.The product boasts good dust suppression,weather resistance,degradation and synergistic combustion performances.Moreover,this study,as the first report on the development and analysis of dust-suppressing microcapsules,fills in the research gap on the reaction mechanism between dust-suppressing microcapsules and coal by MS simulation.The proposed AA-DM-CNF/CA dust-suppressing microcapsules can effectively lower the dust concentration in the space and protect the physical and mental health of coal workers.In general,this research provides a new insight into the structure control and performance enhancement of dust sup-pressants.Expanding the application range of microcapsules is of crucial economic and social benefits.

Bo Ren;Liang Yuan;Gang Zhou;Shuailong Li;Qunzhi Meng;Kai Wang;Bingyou Jiang;Guofeng Yu

School of Emergency Management and Safety Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;State Key Laboratory of Deep Coal Mining&Environment Protection,Huainan Mining Group Co.,LTD.,Huainan 232001,China;Key Laboratory of Industrial Dust Control and Occupational Health,Ministry of Education,Anhui University of Science and Technology,Huainan 232001,China;College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Department of Civil and Environmental Engineering,University of Alberta,Edmonton T6G 2R3,Canada

矿业科学技术学报（英文版）

[1]Bo Ren;Liang Yuan;Gang Zhou;Shuailong Li;Qunzhi Meng;Kai Wang;Bingyou Jiang;Guofeng Yu-.Effectiveness of coal mine dust control:A new technique for preparation and efficacy of self-adaptive microcapsule suppressant)[J].矿业科学技术学报（英文版）,2022(06):1181-1196

pressants

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