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聚乙烯亚胺改性的NH-MIL-101(Al)对染料的高效吸附及其作为环氧树脂阻燃剂的可持续应用

Efficient Adsorption of Dyes Using Polyethyleneimine-Modified NH-MIL-101(Al) and its Sustainable Application as a Flame Retardant for an Epoxy Resin.

作者信息

Wang Jia, Liu Yansong, Guo Xiuyan, Qu Hongqiang, Chang Ran, Ma Jing

机构信息

Hebei University, Baoding 071002, China.

出版信息

ACS Omega. 2020 Dec 7;5(50):32286-32294. doi: 10.1021/acsomega.0c04118. eCollection 2020 Dec 22.

DOI:10.1021/acsomega.0c04118
PMID:33376865
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7758895/
Abstract

Metal-organic frameworks (MOFs) exhibit highly designable properties and have been used in wide applications. To further improve their performance, the modification of MOFs is an effective method. However, the modification process is usually complicated. Besides, the sustainable use of MOFs is difficult to achieve due to the complicated recycling treatment. Herein, we designed a polyethyleneimine (PEI)-modified NH-MIL-101(Al) composite (PEI@NH-MIL-101(Al)). This composite showed excellent dye removal performance of methyl orange (MO, 89.4%) and Direct Red 80 (DR80, 99.8%). Remarkably, the dye removal application of PEI@NH-MIL-101(Al) also acted as a modification process toward flame retardant application. Thus, the dye-adsorbed PEI@NH-MIL-101(Al) composite (MO-PEI@NH-MIL-101(Al) and DR80-PEI@NH-MIL-101(Al)) was sustainably used as an effective flame retardant for an epoxy resin (EP) at low additions (4.0 wt %). The limiting oxygen values of EP/MO-PEI@NH-MIL-101(Al) and EP/DR80-PEI@NH-MIL-101(Al) increased to 26.5 and 26.7%, respectively. The heat release and the smoke production of dyes-PEI@NH-MIL-101(Al)/EP were greatly reduced compared with those of EP. This strategy provides a simple and effective modification method for MOFs. Meanwhile, the modified MOF composite can achieve sustainable application, giving full play to the advantages of MOFs.

摘要

金属有机框架材料（MOFs）具有高度可设计的特性，已被广泛应用。为了进一步提高其性能，对MOFs进行改性是一种有效的方法。然而，改性过程通常很复杂。此外，由于复杂的回收处理，MOFs的可持续利用难以实现。在此，我们设计了一种聚乙烯亚胺（PEI）改性的NH-MIL-101（Al）复合材料（PEI@NH-MIL-101（Al））。该复合材料对甲基橙（MO，去除率89.4%）和直接红80（DR80，去除率99.8%）表现出优异的染料去除性能。值得注意的是，PEI@NH-MIL-101（Al）的染料去除应用同时也起到了对阻燃应用的改性作用。因此，吸附染料的PEI@NH-MIL-101（Al）复合材料（MO-PEI@NH-MIL-101（Al）和DR80-PEI@NH-MIL-101（Al））在低添加量（4.0 wt%）时可作为环氧树脂（EP）的有效阻燃剂被可持续利用。EP/MO-PEI@NH-MIL-101（Al）和EP/DR80-PEI@NH-MIL-101（Al）的极限氧指数分别提高到了26.5%和26.7%。与EP相比，染料-PEI@NH-MIL-101（Al）/EP的热释放和产烟量大大降低。该策略为MOFs提供了一种简单有效的改性方法。同时，改性后的MOF复合材料能够实现可持续应用，充分发挥MOFs的优势。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ae3/7758895/cfdeba279af3/ao0c04118_0010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ae3/7758895/4981209b9315/ao0c04118_0006.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ae3/7758895/cfdeba279af3/ao0c04118_0010.jpg

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