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Development of a photoresponsive chitosan conjugated prodrug nano-carrier for controlled delivery of antitumor drug 5-fluorouracil. Int J Biol Macromol 2019; 121:1070-1076. [DOI: 10.1016/j.ijbiomac.2018.10.095] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/01/2018] [Accepted: 10/14/2018] [Indexed: 10/28/2022]
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Wang Y, Lu G, Wang W, Cao M, Luo Z, Shao N, Wang B. Molecular design and synthesis of thermotropic liquid crystalline poly(amide imide)s with high thermal stability and solubility. E-POLYMERS 2017. [DOI: 10.1515/epoly-2016-0288] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
AbstractA series of thermotropic liquid crystalline poly(amide imide)s (PAIs) with well-defined structure were prepared by the Yamazaki-Higashi phosphorylation method. To obtain the target polymers, several diimide diacid monomers (DIDAs) as mesogenic units were synthesized by the dehydration cyclization of aromatic anhydride with aliphatic 11-aminoundecanoic acid (AU). The chemical structure of these DIDAs and PAIs was confirmed via Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1H-NMR) spectroscopy. Thermotropic liquid crystalline characteristics of the DIDAs and PAIs were investigated by differential scanning calorimetry (DSC), polarizing light microscopy (PLM) and X-ray diffraction (XRD) analysis. Encouragingly, all of these liquid crystalline PAIs exhibited good thermal stability, in which the decomposition temperatures are much higher than the melting temperatures of PAIs. Furthermore, the liquid crystalline PAIs can be dissolved into some common solvents such as dimethyl sulfoxide (DMSO) and m-cresol, which indicates these liquid crystalline PAIs could be processed not only by melting-processing but also by solution spin-coating.
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Affiliation(s)
- Yanbin Wang
- 1School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Guangming Lu
- 1School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Wenjie Wang
- 1School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Meng Cao
- 1School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Zhonglin Luo
- 1School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Ningning Shao
- 1School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
| | - Biaobing Wang
- 1School of Materials Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China
- 2Jiangsu Collaborative Innovation Center for Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, Jiangsu Province, China, Tel.: +86 519 8633 0075
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