Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 582, Issue -, Pages 619-630Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.08.077
Keywords
Cu2+ adsorption; Polydopamine-coated polystyrene nanospheres; Smoke toxicity; Fire safety; Analytic hierarchy process
Categories
Funding
- Natural Science Foundation of China [51323010]
- Fundamental Research Funds for the Central Universities [WK2320000032]
- National Key R&D Program of the MOST of China [2016YFA0300201]
- China Postdoctoral Special Funding [2019TQ0309]
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Polydopamine-coated polystyrene (PS@PDA) nanospheres exhibit excellent Cu2+ adsorption capacity, which can be further used to prepare PS nanocomposites with enhanced flame retardancy. A new evaluation system based on analytic hierarchy process is introduced for comprehensive analysis of fire safety of samples, showing that PS@PDA absorption of Cu2+ leads to reduced smoke and toxic gas production, improving overall fire safety performance.
Polydopamine-coated polystyrene (PS@PDA) nanospheres which are prepared by self-polymerizing of dopamine on the surfaces of polystyrene (PS) nanospheres show excellent Cu2+ adsorption capacity. The Cu2+ adsorption capacity of PS@PDA can even reach 178 mg/g in about 6 min, which is superior to the other adsorption materials reported in literatures. Through linear fitting, it can be seen that Cu2+ is chemisorption covered by multilayers on the surface of PS@PDA, with less affect by temperature. The PS@PDA nanosphere with good adsorption capacity is first applied as the Cu2+ adsorbent and then recycled to preparation of PS nanocomposite with enhanced flame retardancy, great smoke and toxic gases suppression properties. To overcome the drawbacks of evaluation methods reported before, a new evaluation system of analytic hier-archy process is first applied to comprehensively analyze fire safety of samples. The average value of smoke production rate of PS@PDA absorbed 5 mg/L Cu2+ (PS 2) reduces by about 10%, and the average and total yield of carbon monoxide of PS 2 decrease by 15.7% and 18.1% compared with that of neat PS, respectively. PS 2 with the highest score of 86.75 has the best comprehensive fire safety performance among all samples. This work provides a guideline for green flame-retardant chemistry. (c) 2020 Elsevier Inc. All rights reserved.
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