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Soc. open sci."],"published-print":{"date-parts":[[2021,1,27]]},"abstract":"<jats:p>\n            In this work, a novel amphoteric copolymer named Poly(sodium p-styrenesulfonate\u2013\n            <jats:italic>co<\/jats:italic>\n            -acrylic acid-\n            <jats:italic>co<\/jats:italic>\n            -diallyldimethylammonium chloride) (P(SS-\n            <jats:italic>co<\/jats:italic>\n            -AA-\n            <jats:italic>co<\/jats:italic>\n            -DMDAAC)) was synthesized via free radical polymerization. Afterwards, P(SS-\n            <jats:italic>co<\/jats:italic>\n            -AA-\n            <jats:italic>co<\/jats:italic>\n            -DMDAAC) was explored for use as a dispersant in coal water slurry (CWS) preparation. The structure of P(SS-\n            <jats:italic>co<\/jats:italic>\n            -AA-\n            <jats:italic>co<\/jats:italic>\n            -DMDAAC) was verified by Fourier transform infrared spectroscopy and nuclear magnetic resonance. The synthetic conditions were optimized as the feed ratio of AA to SS was 1 : 1 (for Yulin coal) or 1.5 : 1 (for Yili coal), and DMDAAC dosage was 4.0 wt% (for Yulin coal) and 6.0 wt% (for Yili coal) toward total monomers. The performances of P(SS-\n            <jats:italic>co<\/jats:italic>\n            -AA-\n            <jats:italic>co<\/jats:italic>\n            -DMDAAC) as a dispersant for CWS were evaluated by various technologies, such as apparent viscosity, zeta potential, static stability and contact angle measurements. The results revealed that the optimized dosage of P(SS-\n            <jats:italic>co<\/jats:italic>\n            -AA-\n            <jats:italic>co<\/jats:italic>\n            -DMDAAC) in CWS preparation was 0.3 and 0.4 wt% for Yulin coal and Yili coal respectively. In this optimum condition, CWS prepared using P(SS-\n            <jats:italic>co<\/jats:italic>\n            -AA-\n            <jats:italic>co<\/jats:italic>\n            -DMDAAC) as dispersant showed a typical shear thinning behaviour and excellent stability, which are desired in industries. The rheological models also confirmed the pseudo-plastic characteristics of CWS. Finally, compared with the widely used anionic dispersant naphthalene sulphonate formaldehyde condensate (NSF) and poly(sodium p-styrenesulfonate) (PSS), P(SS-\n            <jats:italic>co<\/jats:italic>\n            -AA-\n            <jats:italic>co<\/jats:italic>\n            -DMDAAC) developed in this work exhibited better slurry making performance. The introduction of cationic functional groups promoted the adsorption of the dispersant, which further enhanced the electrostatic repulsion and steric hindrance among coal particles. Accordingly, the viscosity of CWS decreased and static stability enhanced.\n          <\/jats:p>","DOI":"10.1098\/rsos.201480","type":"journal-article","created":{"date-parts":[[2021,1,13]],"date-time":"2021-01-13T08:15:30Z","timestamp":1610525730000},"page":"201480","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":22,"title":["Synthesis of a novel amphoteric copolymer and its application as a dispersant for coal water slurry preparation"],"prefix":"10.1098","volume":"8","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8890-3428","authenticated-orcid":true,"given":"Lun","family":"Du","sequence":"first","affiliation":[{"name":"Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1260-5245","authenticated-orcid":true,"given":"Guanghua","family":"Zhang","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dongdong","family":"Yang","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Luo","sequence":"additional","affiliation":[{"name":"Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, People's Republic of 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