1
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Mao Q, Yao M, Nie J, He Y. Construction of ternary mixture of long-chain acrylates for lower-temperature and higher-effect rotator phase photopolymerization. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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2
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Gong Y, Yao M, Nie J, He Y. Healing Strategy Based on Space Adjustment for Cross-Linked Polymer Networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:12229-12234. [PMID: 36178935 DOI: 10.1021/acs.langmuir.2c01861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Healable materials are notable for their ability to recover from mechanical damage. Most methods for preparing cross-linked healable materials require the introduction of healing agents or supramolecular interactions in solvent environments. Hence, a strategy without the addition of functional component remains a key challenge. Herein, a healing strategy based on space adjustment is proposed with cross-linked poly(octadecyl acrylate) as a model, and this strategy demonstrates that the predesigned holes in cross-linked networks can supply the possibility for polymer coils to move and decrease the space density of the networks during the annealing process. As a result, the motilities of coils are enhanced, which allows them to easily penetrate and entangle in fracture sites. In contrast with the untreated cross-linked poly(octadecyl acrylate), which cannot heal, the space-adjusted poly(octadecyl acrylate) readily heals, and the highest healing efficiency is 96%. The ways in which the extent of space adjustment and the content of the cross-linking agent affect the healing efficiency are discussed, and the mechanism of the space adjustment strategy is studied through rheology research. This strategy concentrates on adjusting the spatial density of the network without the need for any functional design, which may be applied in various polymer systems.
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Affiliation(s)
- Yawen Gong
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Miao Yao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou, Jiangsu 213164, PR China
| | - Jun Nie
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Yong He
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- Changzhou Institute of Advanced Materials, Beijing University of Chemical Technology, Changzhou, Jiangsu 213164, PR China
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3
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Poon L, Hum JR, Weiss RG. Effects of cyclic and acyclic amidine side-chains on the properties of polysiloxane ionomers constructed in situ from three uncharged components. SOFT MATTER 2022; 18:5502-5508. [PMID: 35848508 DOI: 10.1039/d2sm00382a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Ionomers, polysiloxanes with imidazolinium dithiocarbamate side chains, have been synthesized in situ from three uncharged components-a polysiloxane with imidazole side chains, CS2, and hexylamine or octadecylamine. Their structural and dynamic properties are compared over a temperature range of 0-50 °C with those of the analogous ionomers in which the polysiloxanes have amidinium side chains. The results, primarily from differential scanning calorimetry, powder X-ray diffraction measurements, and rheology show that the small structural (and smaller electronic) differences between the cyclic 5-membered ring imidazolinium and acyclic amidinium groups have marked effects on the bulk properties of the ionomers. These include their shear strengths and the manner in which the microcrystalline portions of the ionomers with dithiooctadecylcarbamate anions are packed. Thus, it is possible to finely tune the natures of the ionomers from one polysiloxane by changing temperature, the chain length of the alkylamine, and the nature of the base attached to the polysiloxane chain. Why these changes occur to the various properties is discussed.
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Affiliation(s)
- Louis Poon
- Department of Chemistry and Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC 20057-1227, USA.
| | - Jacob R Hum
- Department of Chemistry and Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC 20057-1227, USA.
| | - Richard G Weiss
- Department of Chemistry and Institute for Soft Matter Synthesis and Metrology, Georgetown University, Washington, DC 20057-1227, USA.
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Poon L, Weiss RG. Uncharged Lewis bases yield polydimethylsiloxane ionomers with amidinium alkyldithiocarbamate side chains. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Louis Poon
- Department of Chemistry, Institute for Soft Matter Synthesis and Metrology, Georgetown University Washington DC USA
| | - Richard G. Weiss
- Department of Chemistry, Institute for Soft Matter Synthesis and Metrology, Georgetown University Washington DC USA
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Deng S, Huang L, Wu J, Pan P, Zhao Q, Xie T. Bioinspired Dual-Mode Temporal Communication via Digitally Programmable Phase-Change Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008119. [PMID: 33960032 DOI: 10.1002/adma.202008119] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Switchable optical properties are essential for numerous technologies including communication, anticounterfeiting, camouflage, and imaging/sensing. Typically, the switching is enabled by applying external stimulation such as UV light for fluorescence detection. In contrast, ground squirrels utilize spontaneous live infrared emission for fencing off predators as a unique way of communication. Inspired by this, live evolution of both optical and thermal images for temporal communication in which time is the encoded information is demonstrated. This system is based on a digitally light-cured polymeric phase-change material for which the crystallization kinetics can be controlled in a pixelated manner. Consequently, live evolution in optical transparency during the crystallization process enables temporal optical communication. Additionally, by harnessing the dynamic evolution of the thermal enthalpy, multiple sets of time-specific information can be reversibly retrieved as self-evolving infrared thermal images. The versatility of this dual-mode temporal system expands the scope for secured communication, with potential implications for various other areas including optics, thermal regulation, and 3D/4D printing.
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Affiliation(s)
- Shihong Deng
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Limei Huang
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Jingjun Wu
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Qian Zhao
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
| | - Tao Xie
- State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou, 311215, China
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6
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Solid-state photopolymerization of long-chain vinyl carboxylates through binary molecular arrangement adjustment. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Le HT, Wang C, Goto A. Solid‐Phase Radical Polymerization of Halogen‐Bond‐Based Crystals and Applications to Pre‐Shaped Polymer Materials. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hong Tho Le
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Chen‐Gang Wang
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
| | - Atsushi Goto
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link 637371 Singapore Singapore
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Le HT, Wang CG, Goto A. Solid-Phase Radical Polymerization of Halogen-Bond-Based Crystals and Applications to Pre-Shaped Polymer Materials. Angew Chem Int Ed Engl 2020; 59:9360-9364. [PMID: 32180313 DOI: 10.1002/anie.202001544] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/05/2020] [Indexed: 12/31/2022]
Abstract
Liquid vinyl monomers were converted into solid crystals via halogen bonding. They underwent solid-phase radical polymerizations through heating at 40 °C or ultraviolet photo-irradiation (365 nm). The X-ray crystallography analysis showed the high degree of monomer alignment in the crystals. The polymerizations of the solid monomer crystals yielded polymers with high molecular weights and relatively low dispersities because of the high degree of the monomer alignment in the crystal. As a unique application of this system, the crystalized monomers were assembled to pre-determined structures, followed by solid-phase polymerization, to obtain a two-layer polymer sheet and a three-dimensional house-shaped polymer material. The two-layer sheet contained a unique asymmetric pore structure and exhibited a solvent-responsive shape memory property and may find applications to asymmetric membranes and polymer actuators.
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Affiliation(s)
- Hong Tho Le
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
| | - Chen-Gang Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
| | - Atsushi Goto
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
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Yao M, Wang J, Nie J, He Y. The unusual improvement of normal alkyl alcohol on solid-state cationic photopolymerization of octadecyl vinyl ether. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.01.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang Q, Li Q, Yasir Akram M, Ali S, Nie J, Zhu X. Decomposable Polyvinyl Alcohol-Based Super-Hydrophobic Three-Dimensional Porous Material for Effective Water/Oil Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:15700-15707. [PMID: 30484657 DOI: 10.1021/acs.langmuir.8b03270] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The development of the oil industry brings the critical problem of ocean pollution by oil spill or fossil fuels. The use of materials for water/oil separation is one of the effective approaches to solve this crisis. Polyvinyl alcohol (PVA) has been used to prepare water/oil separation materials. Currently, glutaraldehyde has been employed as the cross-linking agent, which is well known to be toxic and environmentally unfriendly. Moreover, it is difficult to deal with the disposal of the Across-linked material. Here, we propose a strategy of fabricating macroporous material which was prepared by PVA and sodium silicate (Na2SiO3) in aqueous solution. Following through with the one-step method of sol-gel reaction of hydroxyl groups with trimethoxy(octadecyl)silane, the low surface energy substance was grafted on the macroporous material and a super-hydrophobic macroporous membrane for water/oil separation was prepared. As oil sorbent, the as-prepared dried super-hydrophobic PVA/Na2SiO3 porous materials (PSD6S) have the adsorption capacity of 1.8-7.0 g/g for oil uptake, which depends on the type of oil liquid. Typically, the separation efficiency of this material could reach more than 99% even after 10 times of use without the help of ambient pressure. It is noteworthy that the as-prepared samples could be easily decomposable and dissolvable completely in acidic medium at a rapid rate.
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Affiliation(s)
- Qunying Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
| | - Qing Li
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
| | - M Yasir Akram
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
| | - Safdar Ali
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
| | - Jun Nie
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
| | - Xiaoqun Zhu
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials , Beijing University of Chemical Technology , Beijing 100029 , P. R. China
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Yao M, Nie J, He Y. 0 + 0 = 2: Changeover of Stability and Photopolymerization Kinetics for the Rotator Phase of Long-Chain Acrylate through the Ultra-Addition Effect in Binary Systems. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01263] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miao Yao
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Jun Nie
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Yong He
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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