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Xie X, Dong S, Hong K, Huang J, Xu X. Catalytic Asymmetric Difluoroalkylation Using In Situ Generated Difluoroenol Species as the Privileged Synthon. Adv Sci (Weinh) 2024; 11:e2307520. [PMID: 38318687 PMCID: PMC11005710 DOI: 10.1002/advs.202307520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/29/2023] [Indexed: 02/07/2024]
Abstract
A robust and practical difluoroalkylation synthon, α,α-difluoroenol species, which generated in situ from trifluoromethyl diazo compounds and water in the presence of dirhodium complex, is disclosed. As compared to the presynthesized difluoroenoxysilane and in situ formed difluoroenolate under basic conditions, this difluoroenol intermediate displayed versatile reactivity, resulting in dramatically improved enantioselectivity under mild conditions. As demonstrated in catalytic asymmetric aldol reaction and Mannich reactions with ketones or imines in the presence of chiral organocatalysts, quinine-derived urea, and chiral phosphoric acid (CPA), respectively, this relay catalysis strategy provides an effective platform for applying asymmetric fluorination chemistry. Moreover, this method features a novel 1,2-difunctionalization process via installation of a carbonyl motif and an alkyl group on two vicinal carbons, which is a complementary protocol to the metal carbene gem-difunctionalization reaction.
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Affiliation(s)
- Xiongda Xie
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Shanliang Dong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Kemiao Hong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Jingjing Huang
- School of Chemistry, Sun Yat-Sen University, Guangzhou, Guangdong, 510275, P. R. China
| | - Xinfang Xu
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, P. R. China
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Lin X, Gan J, Jiang C, Xue S, Liang Y. Wi-Fi-Based Indoor Localization and Navigation: A Robot-Aided Hybrid Deep Learning Approach. Sensors (Basel) 2023; 23:6320. [PMID: 37514616 PMCID: PMC10383105 DOI: 10.3390/s23146320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023]
Abstract
Indoor localization and navigation have become an increasingly important problem in both industry and academia with the widespread use of mobile smart devices and the development of network techniques. The Wi-Fi-based technology shows great potential for applications due to the ubiquitous Wi-Fi infrastructure in public indoor environments. Most existing approaches use trilateration or machine learning methods to predict locations from a set of annotated Wi-Fi observations. However, annotated data are not always readily available. In this paper, we propose a robot-aided data collection strategy to obtain the limited but high-quality labeled data and a large amount of unlabeled data. Furthermore, we design two deep learning models based on a variational autoencoder for the localization and navigation tasks, respectively. To make full use of the collected data, a hybrid learning approach is developed to train the models by combining supervised, unsupervised and semi-supervised learning strategies. Extensive experiments suggest that our approach enables the models to learn effective knowledge from unlabeled data with incremental improvements, and it can achieve promising localization and navigation performance in a complex indoor environment with obstacles.
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Affiliation(s)
- Xuxin Lin
- Faculty of Innovation Engineering, Macau University of Science and Technology, Macau 999078, China
- Zhuhai Da Heng Qin Technology Development Co., Ltd., Zhuhai 519000, China
| | - Jianwen Gan
- Faculty of Innovation Engineering, Macau University of Science and Technology, Macau 999078, China
| | - Chaohao Jiang
- Faculty of Innovation Engineering, Macau University of Science and Technology, Macau 999078, China
| | - Shuai Xue
- Faculty of Innovation Engineering, Macau University of Science and Technology, Macau 999078, China
- School of Applied Science and Civil Engineering, Beijing Institute of Technology Zhuhai, Zhuhai 519000, China
| | - Yanyan Liang
- Faculty of Innovation Engineering, Macau University of Science and Technology, Macau 999078, China
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Zhao L, Lin LZ, Zeng Y, Teng WK, Chen MY, Brand JJ, Zheng LL, Gan NQ, Gong YH, Li XY, Lv J, Chen T, Han BP, Song LR, Shu WS. The facilitating role of phycospheric heterotrophic bacteria in cyanobacterial phosphonate availability and Microcystis bloom maintenance. Microbiome 2023; 11:142. [PMID: 37365664 DOI: 10.1186/s40168-023-01582-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/23/2023] [Indexed: 06/28/2023]
Abstract
BACKGROUND Phosphonates are the main components in the global phosphorus redox cycle. Little is known about phosphonate metabolism in freshwater ecosystems, although rapid consumption of phosphonates has been observed frequently. Cyanobacteria are often the dominant primary producers in freshwaters; yet, only a few strains of cyanobacteria encode phosphonate-degrading (C-P lyase) gene clusters. The phycosphere is defined as the microenvironment in which extensive phytoplankton and heterotrophic bacteria interactions occur. It has been demonstrated that phytoplankton may recruit phycospheric bacteria based on their own needs. Therefore, the establishment of a phycospheric community rich in phosphonate-degrading-bacteria likely facilitates cyanobacterial proliferation, especially in waters with scarce phosphorus. We characterized the distribution of heterotrophic phosphonate-degrading bacteria in field Microcystis bloom samples and in laboratory cyanobacteria "phycospheres" by qPCR and metagenomic analyses. The role of phosphonate-degrading phycospheric bacteria in cyanobacterial proliferation was determined through coculturing of heterotrophic bacteria with an axenic Microcystis aeruginosa strain and by metatranscriptomic analysis using field Microcystis aggregate samples. RESULTS Abundant bacteria that carry C-P lyase clusters were identified in plankton samples from freshwater Lakes Dianchi and Taihu during Microcystis bloom periods. Metagenomic analysis of 162 non-axenic laboratory strains of cyanobacteria (consortia cultures containing heterotrophic bacteria) showed that 20% (128/647) of high-quality bins from eighty of these consortia encode intact C-P lyase clusters, with an abundance ranging up to nearly 13%. Phycospheric bacterial phosphonate catabolism genes were expressed continually across bloom seasons, as demonstrated through metatranscriptomic analysis using sixteen field Microcystis aggregate samples. Coculturing experiments revealed that although Microcystis cultures did not catabolize methylphosphonate when axenic, they demonstrated sustained growth when cocultured with phosphonate-utilizing phycospheric bacteria in medium containing methylphosphonate as the sole source of phosphorus. CONCLUSIONS The recruitment of heterotrophic phosphonate-degrading phycospheric bacteria by cyanobacteria is a hedge against phosphorus scarcity by facilitating phosphonate availability. Cyanobacterial consortia are likely primary contributors to aquatic phosphonate mineralization, thereby facilitating sustained cyanobacterial growth, and even bloom maintenance, in phosphate-deficient waters. Video Abstract.
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Affiliation(s)
- Liang Zhao
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631, People's Republic of China
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China
| | - Li-Zhou Lin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, 510070, People's Republic of China
| | - Ying Zeng
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - Wen-Kai Teng
- State Key Laboratory of Biocontrol, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, People's Republic of China
| | - Meng-Yun Chen
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - Jerry J Brand
- Department of Molecular Biosciences and the Culture Collection of Algae, University of Texas at Austin, Austin, TX, 78712, USA
| | - Ling-Ling Zheng
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China
- National Aquatic Biological Resource Center, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Nan-Qin Gan
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China
| | - Yong-Hui Gong
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - Xin-Yi Li
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - Jin Lv
- Analysis and Testing Center, South China Normal University, Guangzhou, 510631, People's Republic of China
| | - Ting Chen
- Institute for Artificial Intelligence and Department of Computer Science and Technology, Tsinghua University, Beijing, 100084, People's Republic of China
| | - Bo-Ping Han
- Department of Ecology and Institute of Hydrobiology, Jinan University, Guangzhou, 510632, People's Republic of China.
| | - Li-Rong Song
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China.
- National Aquatic Biological Resource Center, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People's Republic of China.
| | - Wen-Sheng Shu
- Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou, 510631, People's Republic of China.
- Guangdong Magigene Biotechnology Co., Ltd., Shenzhen, 518081, People's Republic of China.
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Zou Q, Wang W, Xu Q, Yan M, Lan D, Wang Y. Influence of Proteins on Bioaccessibility of α-Tocopherol Encapsulation within High Diacylglycerol-Based Emulsions. Foods 2023; 12:2483. [PMID: 37444221 DOI: 10.3390/foods12132483] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/03/2023] [Accepted: 06/16/2023] [Indexed: 07/15/2023] Open
Abstract
α-Tocopherol has been widely used in medicine, cosmetics, and food industry as a nutritional supplement and antioxidant. However, α-tocopherol showed low bioaccessibility, and there is a widespread α-tocopherol deficiency in society today. The preparation of oil-in-water emulsions with high safety and low-calorie property is necessary. The aim of this research was to investigate the effects of different protein emulsifiers (whey protein isolate (WPI), soy protein isolate (SPI), and sodium casein (SC)) on the properties of emulsions delivery system, and diacylglycerol (DAG) was picked as a low-accumulated lipid. The interfacial changes, microstructural alterations, and possible interactions of the protein-stabilized DAG emulsions were investigated during the in vitro digestion. The results show that different proteins affect the degree of digestibility and α-tocopherol bioaccessibility of the emulsions. Both WPI- and SPI-coated emulsions showed good digestibility and α-tocopherol bioaccessibility (77.64 ± 2.93%). This might be due to the strong hydrolysis resistance of WPI (β-lactoglobulin) and the good emulsification ability of SPI. The SC-coated emulsion showed the lowest digestibility and α-tocopherol bioaccessibility, this might be due to the emulsification property of hydrolysis products of SC and the potential interaction with calcium ions. This study provides new possibilities for the application of DAG emulsions in delivery systems.
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Affiliation(s)
- Qian Zou
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Weifei Wang
- Sericultural & Argi-Food Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs/Guangdong Key Laboratory of Agricultural Products Processing, No. 133 Yiheng Street, Dongguanzhuang Road, Tianhe District, Guangzhou 510610, China
| | - Qingqing Xu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Menglei Yan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Dongming Lan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Yonghua Wang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Yue-Shan Special Nutrition Technology Co., Ltd., Foshan 528000, China
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You Q, Lin H, Hong R, Han Z, Zhang D, Ding Y. Structural and Scintillation Properties of Ce 3+:Gd 3Al 3Ga 2O 12 Translucent Ceramics Prepared by One-Step Sintering. Materials (Basel) 2023; 16:ma16093373. [PMID: 37176253 PMCID: PMC10179960 DOI: 10.3390/ma16093373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/19/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023]
Abstract
Cerium-doped gadolinium aluminum gallium garnet (Ce3+:Gd3Al3Ga2O12, Ce3+:GAGG) ceramic is a promising scintillation material. In this study, Ce3+:Gd3Al3Ga2O12 scintillation ceramics were prepared by the one-step sintering of commercially available Gd2O3, Al2O3, Ga2O3, and CeO2 powders in a flowing oxygen atmosphere at 1600 °C by solid-phase reaction sintering. For all the Ce3+:Gd3Al3Ga2O12 ceramic samples doped with different amounts of Ce3+ doping, dense ceramics were obtained. The structure, photoluminescence, and scintillation properties of the Ce3+:Gd3Al3Ga2O12 ceramics have been investigated. The average grain size of samples sintered at 1600 °C is about 2 μm. The X-ray excitation luminescence peak is around 560 nm, which is consistent with that of Ce3+:Gd3Al3Ga2O12 single crystals, matching well with the computed tomography X-ray detector's response sensitivity. The light yield is higher compared to the standard reference sample-lutetium yttrium orthosilicate single crystal.
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Affiliation(s)
- Qi You
- Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
| | - Hui Lin
- Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
| | - Ruijin Hong
- Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
| | - Zhaoxia Han
- Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
| | - Dawei Zhang
- Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jungong Road, Shanghai 200093, China
| | - Yuchong Ding
- Research & Development Center of Material and Equipment, China Electronics Technology Group Corporation No. 26 Research Institute, Chongqing 400060, China
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Yang Y, Zhang Y, Cao J, Su Z, Li F, Zhang P, Zhang B, Liu R, Zhang L, Xie J, Li J, Zhang J, Chen X, Hong A. FGFR4 and EZH2 inhibitors synergistically induce hepatocellular carcinoma apoptosis via repressing YAP signaling. J Exp Clin Cancer Res 2023; 42:96. [PMID: 37085881 PMCID: PMC10122280 DOI: 10.1186/s13046-023-02659-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Accepted: 03/30/2023] [Indexed: 04/23/2023] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is one of the most common and lethal cancers worldwide, but current treatment options remain limited and cause serious life-threatening side effects. Aberrant FGFR4 signaling has been validated as an oncogenic driver of HCC, and EZH2, the catalytic subunit of the PRC2 complex, is a potential factor that contributes to acquired drug resistance in many tumors, including HCC. However, the functional relationship between these two carcinogenic factors, especially their significance for HCC treatment, remains unclear. In this study, we systematically evaluated the feasibility of a combination therapy targeting FGFR4 and EZH2 for HCC. METHODS RNA sequencing data of patients with Liver hepatocellular carcinoma (LIHC) from The Cancer Genome Atlas (TCGA) were analyzed to determine FGFR4 and EZH2 expression and their interaction with prognosis. Moreover, the HCC cell lines, zebrafish/mouse HCC xenografts and zebrafish HCC primary tumors were treated with FGFR4 inhibitor (Roblitinib) and/or EZH2 inhibitor (CPI-169) and then subjected to cell proliferation, viability, apoptosis, and tumor growth analyses to evaluate the feasibility of combination therapy for HCC both in vitro and in vivo. Furthermore, RNA-Seq was performed in combination with ChIP-Seq data analysis to investigate the critical mechanism underlying the combination treatment with Roblitinib and CPI-169. RESULTS EZH2 accumulated through the non-canonical NF-kB signaling in response to FGFR4 inhibitor treatment, and the elevated EZH2 levels led to the antagonism of HCC against Roblitinib (FGFR4 inhibitor). Notably, knockdown of EZH2 sensitized HCC cells to Roblitinib, while the combination treatment of Roblitinib and CPI-169 (EZH2 inhibitor) synergistically induced the HCC cell apoptosis in vitro and suppressed the zebrafish/mouse HCC xenografts and zebrafish HCC primary tumors development in vivo. Moreover, Roblitinib and CPI-169 synergistically inhibited HCC development via repressing YAP signaling. CONCLUSIONS Collectively, our study highlighted the potential of the therapeutic combination of FGFR4 and EZH2 inhibitors, which would provide new references for the further development of clinical treatment strategies for HCC.
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Affiliation(s)
- Yiqi Yang
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
- The First Affiliated Hospital, Ji'nan University, Guangzhou, 510630, China
| | - Yibo Zhang
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Jieqiong Cao
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
- The First Affiliated Hospital, Ji'nan University, Guangzhou, 510630, China
| | - Zijian Su
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Fu Li
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Peiguang Zhang
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Bihui Zhang
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Rongzhan Liu
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Linhao Zhang
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Junye Xie
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Jingsheng Li
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Jinting Zhang
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China
| | - Xiaojia Chen
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China.
- The First Affiliated Hospital, Ji'nan University, Guangzhou, 510630, China.
| | - An Hong
- Institute of Biomedicine & Department of Cell Biology, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Guangdong Provincial Biotechnology Drug & Engineering Technology Research Center, National Engineering Research Center of Genetic Medicine, Ji'nan University, Guangzhou, 510632, China.
- The First Affiliated Hospital, Ji'nan University, Guangzhou, 510630, China.
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Fan P, Xue C, Zhou X, Yang Z, Ji H. Dynamic Covalent Bonds of Si-OR and Si-OSi Enabled A Stiff Polymer to Heal and Recycle at Room Temperature. Materials (Basel) 2021; 14:2680. [PMID: 34065375 PMCID: PMC8160654 DOI: 10.3390/ma14102680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/06/2021] [Accepted: 05/17/2021] [Indexed: 11/16/2022]
Abstract
As stiff polymers are difficult to self-heal, the balance between polymers' self-healing ability and mechanical properties is always a big challenge. Herein, we have developed a novel healable stiff polymer based on the Si-OR and Si-OSi dynamic covalent bonds. The self-healing mechanism was tested and proved by the small molecule model experiments and the contrast experiments of polymers. This polymer possesses excellent tensile, bending properties as well as room temperature self-healing abilities. Moreover, due to the sticky and shapeable properties under wetting conditions, the polymer could be used as an adhesive. Besides, even after four cycles of recycling, the polymer maintains its original properties, which meets the requirements of recyclable materials. It was demonstrated that the polymer exhibits potential application in some fields, such as recyclable materials and healable adhesives.
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Affiliation(s)
- Ping Fan
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China;
| | - Can Xue
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; (X.Z.); (Z.Y.)
| | - Xiantai Zhou
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; (X.Z.); (Z.Y.)
| | - Zujin Yang
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; (X.Z.); (Z.Y.)
| | - Hongbing Ji
- Fine Chemical Industry Research Institute, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China;
- Fine Chemical Industry Research Institute, School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai 519082, China; (X.Z.); (Z.Y.)
- Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture, Maoming 525000, China
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