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基于马铃薯淀粉共聚物与空心碳球的新型复合絮凝剂的合成与表征

Synthesis and Characterization of Novel Hybrid Flocculants Based on Potato Starch Copolymers with Hollow Carbon Spheres.

作者信息

Schmidt Beata, Kowalczyk Krzysztof, Zielinska Beata

机构信息

Department of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-322 Szczecin, Poland.

Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-322 Szczecin, Poland.

出版信息

Materials (Basel). 2021 Mar 18;14(6):1498. doi: 10.3390/ma14061498.

DOI:10.3390/ma14061498
PMID:33803841
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8003131/
Abstract

Novel carbon nanofiller-based starch-g-polyacrylamide hybrid flocculation materials (St-PAM-CS) were in situ prepared using potato starch (St), acrylamide (AM), and hollow mesoporous carbon spheres (CSs; diameters of 300-400 nm). Structures of different St-PAM-CS systems were characterized by Fourier transform infrared (FTIR) spectroscopy, X-Ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), laser scanning microscopy (LSM), and particle size analysis. The flocculation tests were evaluated by removing high turbidity kaolin suspension-initial absorbance 1.84. The effect of the St to AM molar ratio, doses, and content of CSs in hybrids on flocculation efficiency were examined. Satisfactory flocculation efficiency was obtained for all hybrids with 1 wt.% of the CS component. The highest reduction of the kaolin suspension absorbance (to 0.06) was observed for a 3 mL dose of the starch hybrid with the highest AM content. Additionally, St-PAM-CS showed a reduction in the sludge volume in time. The hybrids reached better flocculation efficiency in relation to the reference systems without CSs. The proposed flocculation mechanism (considering bridging, patching, and formation of hydrogen bonds) has been confirmed by the recorded results.

摘要

采用马铃薯淀粉（St）、丙烯酰胺（AM）和中空介孔碳球（CSs；直径300 - 400 nm）原位制备了新型碳纳米填料基淀粉接枝聚丙烯酰胺杂化絮凝材料（St-PAM-CS）。通过傅里叶变换红外（FTIR）光谱、X射线衍射（XRD）、差示扫描量热法（DSC）、热重分析（TGA）、激光扫描显微镜（LSM）和粒度分析对不同St-PAM-CS体系的结构进行了表征。通过去除高浊度高岭土悬浮液（初始吸光度1.84）来评估絮凝试验。考察了杂化材料中St与AM的摩尔比、剂量以及CSs含量对絮凝效率的影响。对于所有含有1 wt.% CS组分的杂化材料，均获得了令人满意的絮凝效率。对于3 mL剂量的含最高AM含量的淀粉杂化材料，观察到高岭土悬浮液吸光度的最大降低（降至0.06）。此外，St-PAM-CS随时间显示出污泥体积的减少。与不含CSs的参考体系相比，杂化材料达到了更好的絮凝效率。记录结果证实了所提出的絮凝机理（考虑桥连、补丁和氢键形成）。

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