聚烯烃合金基大块多孔碳制备  

Preparation of Porous Carbon Monoliths Based on Polyolefin Alloys

作　　者：李程鹏 廖霖清 张百良 钟志颖 李思东 殷腾科 LI Cheng-peng;LIAO Lin-qing;ZHANG Bai-liang;ZHONG Zhi-ying;LI Si-dong;YIN Teng-ke(Chemistry and Environment College, Guangdong Ocean University, Zhanjiang 524088, China)

机构地区：[1]广东海洋大学化学与环境学院

出　　处：《广东海洋大学学报》2019年第5期122-128,共7页Journal of Guangdong Ocean University

基　　金：广东海洋大学博士启动项目(R17003);广东海洋大学创新训练项目(CXXL2018189)

摘　　要：【目的】开发废弃聚丙烯源的多孔碳材料。【方法】以等规聚丙烯(IPP)和无规聚丙烯(APP)的合金为起始原料,经过磺酸化和碳化反应制备聚烯烃合金基多孔碳,并利用红外光谱(FTIR)、差热分析(DSC)、扫描电镜(SEM)对聚丙烯合金及其碳化材料的结构和形貌进行表征,最后以罗丹明b为模型染料研究得到多孔碳的吸附特性。【结果】DSC研究发现,随着APP引入,IPP结晶度从约55%降至约32%。结晶度降低,有效促进磺酸化和交联。FTIR分析表明,磺酸化改性后,其分子骨架中不仅产生了特征的磺酸基团吸收信号,还产生了共轭碳碳双键的特征信号。研究还发现,当APP和IPP用量为1∶1时,其交联度可达约15%。SEM形貌观察发现,磺酸化改性样品均可实现成功碳化,且碳化后样品具有丰富的孔道结构。当APP和IPP用量为1∶1时,碳化率最高可达约14.0%。【结论】本研究制备多孔碳的方法具有高度可行性,当IPP与APP比例为1∶1时所制备的聚烯烃合金基多孔碳材料,其磺酸化效果最好、交联度最高、碳化率最高且吸附性能最好。【Objective】 This article aims to develop the waste polypropylene-based porous carbon monolith.【Method】Isotactic polypropylene(IPP) and random polypropylene(APP) alloys were used as the raw materials to fabricate carbon monolith via sulfonation and carbonation.The structure and morphology of polyolefin alloy and the as-obtained carbon materials were characterized by Fourier Transform infrared spectroscopy(FTIR), Scanning Calorimeter(DSC) and Scanning Electron Microscope(SEM).The adsorption properties of the as-fabricated carbon were evaluated using Rhodamine b as a model dye.【Result】DSC showed that the crystallinity decreased from 55%(pure IPP) to 32%(IPP/APP blend) with the introduction of APP, which effectively promoted the sulfonation and crosslinking of the blends.Fourier FTIR indicated that not only the characteristic sulfonic acid groups but also the conjugated carbon double bond signals were produced after sulfonation modification.Meanwhile, it is found that the crosslinking degree can reach 15% when the dosage ratio of APP to IPP is 1∶1.Morphology observation showed that all the sulfonated samples can be successfully carbonized with abundant pores.The highest carbonization percentage is about 14.0% when APP dosage is 50%.【Conclusion】The method of preparing porous carbon is highly feasible.When the ratio of APP to IPP is 1 ∶ 1, the sulfonation effect and the adsorption performance are the best, also the cross-linking degree and the carbonation rate is the highest.

关 键 词：聚丙烯 多孔碳 结晶 磺酸化 

分 类 号：TQ127.11[化学工程—无机化工]