Easy fabrication of aromatic-rich cellulose-urethane polymer for preferential adsorption of acetophenone over 1-phenylethanol
Easy fabrication of aromatic-rich cellulose-urethane polymer for preferential adsorption of acetophenone over 1-phenylethanol
复制标题
轻松制造富含芳香族的纤维素-聚氨酯聚合物，与 1-苯基乙醇相比优先吸附苯乙酮
DOI：
10.1016/j.carbpol.2018.11.057
复制
发表时间：
2019
影响因子：
11.2
通讯作者：
Ji Hongbing
中科院分区：
文献类型：
--
作者：
Li Guoyu;Chai Kungang;Zhou Liqin;Tong Zhangfa;Ji Hongbing
通过4，4 '，4“-三苯甲烷三异氰酸酯交联纤维素，制备了一种新型的富含芳香族的纤维素-聚氨酯聚合物（ACUP），该聚合物对苯乙酮（AP）的吸附性能优于对苯乙醇（PE）的吸附性能。通过仪器分析证实了ACUP的成功合成，FTIR、TG、XPS、FE-SEM、13 C CP/MAS NMR和XRD。考察了吸附剂用量、搅拌速度、吸附时间、吸附剂浓度和温度对单溶质吸附AP和PE的影响。整个吸附过程是自发的、自发的，符合准二级动力学方程和Freundlich等温式。竞争吸附的影响ACUP吸附剂中的苯基含量，pH值和离子强度的研究，其中ACUP表现出更高的亲和力AP比PE。此外，ACUP作为柱填充材料用于等摩尔AP-PE混合物的吸附分离，显示出优异的分离性能。ACUP的易再生和可回收的特点，证明了在间歇和连续模式下的吸附-解吸循环。根据实验和理论结果，提出了AP在PE上优先吸附的可能机理，即π-π和氢键作用。
A novel aromatic-rich cellulose-urethane polymer (ACUP) was easily fabricated by crosslinking cellulose with 4,4’,4’’-triphenylmethane triisocyanate for preferential adsorption of acetophenone (AP) over 1-phenyethanol (PE). The successful synthesis of ACUP was confirmed by the instrumental analyses, e.g., FTIR, TG, XPS, FE-SEM,13C CP/MAS NMR and XRD. For single-solute adsorption of AP or PE onto ACUP, the effects of adsorbent dosage, agitation speed, time, solute concentration and temperature were systematically investigated. The overall adsorption process was exothermal and spontaneous in nature, and followed the pseudo-second-order kinetic rate equation and Freundlich isotherm model. Competitive adsorption studies concerning the effects of phenyl content in ACUP adsorbent, pH and ionic strength were also presented, in which ACUP showed much higher affinity for AP over PE. In addition, ACUP was examined as a column packing material for adsorptive separation of the equimolar mixture of AP-PE, showing excellent separation capability. The easily-regenerated and recyclable features of ACUP were demonstrated by adsorption-desorption cycles in both batch and continuous modes. Furthermore, a possible mechanism for the preferential adsorption of AP over PE, which may be associated with π-π and hydrogen bonding interactions was suggested on the basis of experimental and theoretical results.