title: A new three-dimensional (3D) multilayer organic material: synthesis, swelling, exfoliation, and application.
abstract: 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 π-π 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's modulus were achieved by addition of 7 wt % OPBA-6 loading.
authors: National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, China.
authors: Lu
authors: L
authors: Xu
authors: Youju
authors: Y
authors: Huang
authors: Junjun
authors: J
authors: Li
authors: Daoliang
authors: D
authors: Wang
authors: Mingming
authors: M
authors: Chen
authors: Jiaojiao
authors: J
authors: Tao
authors: Kunpeng
authors: K
authors: Cui
authors: Guoqiang
authors: G
authors: Pan
authors: Ningdong
authors: N
authors: Huang
authors: Liangbin
authors: L
authors: Li
mesh_terms: D001549:Benzamides / Q000737:chemistry*; D060326:Chemistry Techniques, Synthetic; D008958:Models, Molecular; D008968:Molecular Conformation; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D001549:Benzamides; D011108:Polymers; D014867:Water; C037689:benzamide