Dopamine-modified poly(styrene) nanospheres as new high-speed adsorbents for copper-ions having enhanced smoke-toxicity-suppression and flame-retardancy

• Published in: Journal of colloid and interface science Vol. 582; pp. 619 - 630
• Main Authors: Jin, Ziyu, Xiao, Yuling, Xu, Zhoumei, Zhang, Zixuan, Wang, Huijuan, Mu, Xiaowei, Gui, Zhou
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 15.01.2021
• Subjects: Analytic hierarchy process; Cu2+ adsorption; Fire safety; Polydopamine-coated polystyrene nanospheres; Smoke toxicity; Polydopamine-coated polystyrene nanospheres; Smoke toxicity; Cu2+ adsorption; Analytic hierarchy process; Fire safety
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2020.08.077

[Display omitted] 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 hierarchy 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.