A New Three-Dimensional (3D) Multilayer Organic Material: Synthesis, Swelling, Exfoliation, and Application

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• 作者：Lu Xu ; Youju Huang ; Junjun Li ; Daoliang Wang ; Mingming Chen ; Jiaojiao Tao ; Kunpeng Cui ; Guoqiang Pan ; Ningdong Huang ; Liangbin Li
• 刊名：Langmuir
• 出版年：2013
• 出版时间：March 19, 2013
• 年：2013
• 卷：29
• 期：11
• 页码：3813-3820
• 全文大小：542K
• 年卷期：v.29,no.11(March 19, 2013)
• ISSN：1520-5827

文摘

A novel fully rigid, rod-shaped oligo(p-benzamide) (OPBA-6) molecule was designed and synthesized, which can be recrystallized into a three-dimensional (3D) multilayer material via an antiparallel molecular packing model. Intermolecular hydrogen bonding and 蟺鈥撓€ interaction are brought to ensure a strong intralayer interaction, while decoration of layer surface with sulfonic groups promotes water to enter interlayer space and facilitates the swelling and exfoliation of sample. With a simple dispersion in water, the obtained multilayer material can be easily swollen by water without destruction of in-plane morphology and subsequently delaminated into 2D nanosheets with thickness of about 5.38 nm. This achievement may be the first attempt to exfoliate layered organic materials and thus provide a new strategy to prepare 2D organic nanosheets without using any substrates or templates as required by conventional and widely used self-assembly routes. Based on exfoliated nanosheets, poly(vinyl alcohol) nanocomposites were prepared using a simple water solution processing method. A 64% increase in tensile stress and a 63% improvement in Young鈥檚 modulus were achieved by addition of 7 wt % OPBA-6 loading.