Degradable Superhydrophilic Iron-Pillared Bentonite Doped with Polybutylene Adipate/Terephthalate Open-Cell Foam: Its Application in Dye Degradation, Removal of Heavy Metal Ions, and Oil–Water Separation,Macromolecular Materials and Engineering

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Degradable Superhydrophilic Iron-Pillared Bentonite Doped with Polybutylene Adipate/Terephthalate Open-Cell Foam: Its Application in Dye Degradation, Removal of Heavy Metal Ions, and Oil–Water Separation
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-09-13 , DOI: 10.1002/mame.202100481
Liyan Qiu ₁ , Ajit Dattatray Phule ₁ , Weipeng Zhong ₁ , Shibao Wen ₁ , Zhenxiu Zhang ₁

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Development of industrialization has brought convenience to people's lives; however, it has also brought serious harm to the environment, where, water pollution is the most obvious. Here, a polybutylene adipate terephthalate (PBAT) open-cell foam doped with iron-pillared bentonite (IPB) is prepared by using sugar as a pore-forming agent and solution phase separation, and then combined with a solution dipping method to coat the foam surface with a polyacrylamide/SiO₂, which makes the PBAT foam superhydrophilic. The static adsorption effect of superhydrophilic IPB-doped PBAT open-cell foam on methylene blue (MB) and Cu²⁺ is studied. The adsorption isotherm fitting shows that the adsorption conforms to the Langmuir model and it has biased toward monolayer adsorption. The adsorption kinetics fitting confirms that the adsorption process is in line with the pseudo-second-order adsorption model, which is dominated by chemical adsorption. The modified PBAT open-cell foam has an adsorption effect on Cu²⁺; however, it has weak cyclic adsorption capacity. It shows a good cyclic adsorption ability for the cationic dye MB and it has >95% photodegradation efficiency of the MB after five time's cyclic adsorption. The superhydrophilicity makes the foam to have better applications in oil–water separation.

中文翻译：

掺杂聚己二酸丁二酯/对苯二甲酸丁二醇酯开孔泡沫的可降解超亲水铁柱膨润土在染料降解、重金属离子去除和油水分离中的应用

工业化的发展给人们的生活带来了便利；然而，它也给环境带来了严重的危害，其中水污染最为明显。在这里，以糖为成孔剂和溶液相分离，制备了掺杂铁柱撑膨润土（IPB）的聚己二酸对苯二甲酸丁二醇酯（PBAT）开孔泡沫，然后结合溶液浸渍法对泡沫进行包覆表面带有聚丙烯酰胺/SiO ₂，这使得 PBAT 泡沫具有超亲水性。超亲水性IPB掺杂PBAT开孔泡沫对亚甲基蓝（MB）和Cu ²⁺的静态吸附作用被研究。吸附等温线拟合表明吸附符合朗缪尔模型，并且偏向于单层吸附。吸附动力学拟合证实吸附过程符合以化学吸附为主的拟二级吸附模型。改性PBAT开孔泡沫对Cu ²⁺有吸附作用；但循环吸附能力较弱。它对阳离子染料MB显示出良好的循环吸附能力，5次循环吸附后MB的光降解效率>95%。超亲水性使泡沫在油水分离方面有更好的应用。

更新日期：2021-09-13

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