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Zhao D, Zhao J, Liu L, Guo W, Zhu K, Yang G, Li Z, Wu H. Flexible hybrid integration enabled on-skin electronics for wireless monitoring of electrophysiology and motion. IEEE Trans Biomed Eng 2021; 69:1340-1348. [PMID: 34596530 DOI: 10.1109/tbme.2021.3115464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
On-skin electronics are promising in human motion and vital sign monitoring, disease diagnosis and treatment. On-skin systems are soft and stretchable, and can maintain electrical performances during bending, stretching or twisting, etc. However, current integrated circuit based fabrication processes are not compatible with stretchable substrate, and recently proposed flexible hybrid integration methods typically involve complicated fabrication processes or structural design, and do not support high integration density. Herein, we report a series of flexible hybrid integration strategies which endow the on-skin electronics with advantages of high integration density of electric components, facile fabrications, high stretchability and reliability. Proposed strategies include: 1. High I/O density with highly stretchable and conductive composite materials as interconnects; 2. Multi-layer structures enabled by stretchable and conductive via-holes; 3. High reliability approach for chip attachment onto stretchable substrate; 4. Design and fabrication of strain separation structure. Based on these methods, an on-skin flexible hybrid electronic system (FHES) is fabricated to collect electrocardiogram (ECG) and acceleration data, wirelessly transmit and display the data in real time on a mobile phone application through Bluetooth communication. We also verify the accuracy and stability of the FHES through the measurements of ECG and acceleration data from human skin under various conditions. The flexible hybrid integration schemes proposed can be adopted for the development of a variety of on-skin systems for biomedical applications.
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2
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Meier D, Huch V, Kickelbick G. Aryl‐group
substituted polysiloxanes with high‐optical transmission, thermal stability, and refractive index. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dennis Meier
- Inorganic Solid‐State Chemistry Saarland University Saarbrücken Germany
| | - Volker Huch
- Inorganic Solid‐State Chemistry Saarland University Saarbrücken Germany
| | - Guido Kickelbick
- Inorganic Solid‐State Chemistry Saarland University Saarbrücken Germany
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Fan X, Cao X, Shang X, Zhang X, Huang C, Zhang J, Zheng K, Ma Y. A transparent cyclo-linear polyphenylsiloxane elastomer integrating high refractive index, thermal stability and flexibility. Polym Chem 2021. [DOI: 10.1039/d1py00688f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A cyclo-linear structured transparent polyphenylsiloxane elastomer combining high refractive index, high thermal stability and superior flexibility was prepared by a one-pot hydrosilylation reaction.
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Affiliation(s)
- Xianpeng Fan
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Xinyu Cao
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xinxin Shang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xianglan Zhang
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
| | - Cheng Huang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jingnan Zhang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Kun Zheng
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yongmei Ma
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences (BNLMS), China
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4
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Steinbach JC, Schneider M, Hauler O, Lorenz G, Rebner K, Kandelbauer A. A Process Analytical Concept for In-Line FTIR Monitoring of Polysiloxane Formation. Polymers (Basel) 2020; 12:polym12112473. [PMID: 33113786 PMCID: PMC7693933 DOI: 10.3390/polym12112473] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/23/2020] [Accepted: 10/23/2020] [Indexed: 11/30/2022] Open
Abstract
The chemical synthesis of polysiloxanes from monomeric starting materials involves a series of hydrolysis, condensation and modification reactions with complex monomeric and oligomeric reaction mixtures. Real-time monitoring and precise process control of the synthesis process is of great importance to ensure reproducible intermediates and products and can readily be performed by optical spectroscopy. In chemical reactions involving rapid and simultaneous functional group transformations and complex reaction mixtures, however, the spectroscopic signals are often ambiguous due to overlapping bands, shifting peaks and changing baselines. The univariate analysis of individual absorbance signals is hence often only of limited use. In contrast, batch modelling based on the multivariate analysis of the time course of principal components (PCs) derived from the reaction spectra provides a more efficient tool for real-time monitoring. In batch modelling, not only single absorbance bands are used but information over a broad range of wavelengths is extracted from the evolving spectral fingerprints and used for analysis. Thereby, process control can be based on numerous chemical and morphological changes taking place during synthesis. “Bad” (or abnormal) batches can quickly be distinguished from “normal” ones by comparing the respective reaction trajectories in real time. In this work, FTIR spectroscopy was combined with multivariate data analysis for the in-line process characterization and batch modelling of polysiloxane formation. The synthesis was conducted under different starting conditions using various reactant concentrations. The complex spectral information was evaluated using chemometrics (principal component analysis, PCA). Specific spectral features at different stages of the reaction were assigned to the corresponding reaction steps. Reaction trajectories were derived based on batch modelling using a wide range of wavelengths. Subsequently, complexity was reduced again to the most relevant absorbance signals in order to derive a concept for a low-cost process spectroscopic set-up which could be used for real-time process monitoring and reaction control.
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Affiliation(s)
- Julia C. Steinbach
- School of Applied Chemistry, Reutlingen University, 72762 Reutlingen, Germany; (J.C.S.); (M.S.); (G.L.); (K.R.)
- Reutlingen Research Institute, 72762 Reutlingen, Germany;
| | - Markus Schneider
- School of Applied Chemistry, Reutlingen University, 72762 Reutlingen, Germany; (J.C.S.); (M.S.); (G.L.); (K.R.)
- Reutlingen Research Institute, 72762 Reutlingen, Germany;
| | - Otto Hauler
- Reutlingen Research Institute, 72762 Reutlingen, Germany;
| | - Günter Lorenz
- School of Applied Chemistry, Reutlingen University, 72762 Reutlingen, Germany; (J.C.S.); (M.S.); (G.L.); (K.R.)
- Reutlingen Research Institute, 72762 Reutlingen, Germany;
| | - Karsten Rebner
- School of Applied Chemistry, Reutlingen University, 72762 Reutlingen, Germany; (J.C.S.); (M.S.); (G.L.); (K.R.)
- Reutlingen Research Institute, 72762 Reutlingen, Germany;
| | - Andreas Kandelbauer
- School of Applied Chemistry, Reutlingen University, 72762 Reutlingen, Germany; (J.C.S.); (M.S.); (G.L.); (K.R.)
- Reutlingen Research Institute, 72762 Reutlingen, Germany;
- Correspondence: ; Tel.: +49-7121-271-2009
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5
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Wang Y, Wu H, Chen Z, Zhou S, Chen Y, Liang M, Zou H. Silicone-epoxy block hybrid network to achieve high-performance and transparent polydimethylsiloxane materials. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Huang Y, Feng Y, Sun X, Han Y, Liu D, Tan X. Preparation of ZrO
2
/silicone hybrid materials for LED encapsulation via in situ sol‐gel reaction. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4614] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yufeng Huang
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300350 China
| | - Yakai Feng
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300350 China
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin) Tianjin 300072 China
| | - Xujun Sun
- TecoréSynchem Electronic Materials Co., Ltd Tianjin 300451 China
- TecoréSynchem Photoelectric Materials Co., Ltd Tianjin 300451 China
| | - Ying Han
- TecoréSynchem Photoelectric Materials Co., Ltd Tianjin 300451 China
| | - Dongshun Liu
- TecoréSynchem Photoelectric Materials Co., Ltd Tianjin 300451 China
| | - Xiaohua Tan
- TecoréSynchem Electronic Materials Co., Ltd Tianjin 300451 China
- TecoréSynchem Photoelectric Materials Co., Ltd Tianjin 300451 China
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7
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Low cracking ratio of paraffin microcapsules shelled by hydroxyl terminated polydimethylsiloxane modified melamine-formaldehyde resin. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.078] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Shang XX, Duan S, Zhang M, Cao XY, Zheng K, Zhang JN, Ma YM, Zhang RB. UV-curable ladder-like diphenylsiloxane-bridged methacryl-phenyl-siloxane for high power LED encapsulation. RSC Adv 2018; 8:9049-9056. [PMID: 35541877 PMCID: PMC9078592 DOI: 10.1039/c8ra00063h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 02/12/2018] [Indexed: 12/15/2022] Open
Abstract
A UV curable ladder-like diphenylsiloxane-bridged methacryl-phenyl-siloxane (L-MPS) was synthesized from phenyltrichlorosilane, diphenylsilanediol and methacryloxypropyldimethylmethoxysilane via dehydrochlorination precoupling, supramolecular architecture-directed hydrolysis-condensation and end-capping reactions. The L-MPS has a condensation degree of ∼100%, and can be complete crosslinked by UV curing. XRD, TEM and molecular simulation suggest that the ladder-like molecules are close packed with a periodic distance of ca. 1.2 nm. The L-MPS shows transmittance of 98% and a refractive index of ca. 1.61 at 450 nm. The cured L-MPS with a Td5% value of 465.5 °C showed excellent anti-yellowing and anti-sulfidation properties. The cured L-MPS film and the encapsulated LED samples were compared with those of Dow Corning OE-6630 and OE-7662. It is believed that the dense nano-ladder unit also contributes to the thermal, gas barrier and even optical properties. L-MPS shows promising potential as a high power LED encapsulant and optical coating for use in harsh environments. This work provides an approach to integrate this novel ladder structure with advanced properties. UV-curable ladder-like polysiloxane was constructed to integrate high RI (1.61/450 nm) with high thermal stability etc. for high power LED encapsulation.![]()
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Affiliation(s)
- X. X. Shang
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - S. Duan
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - M. Zhang
- Key Laboratory of Light Industry and Chemical Auxiliary Chemistry and Technology
- Ministry of Education
- Shaanxi University of Science & Technology
- Xi'an 710021
- P. R. China
| | - X. Y. Cao
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - K. Zheng
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - J. N. Zhang
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - Y. M. Ma
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
| | - R. B. Zhang
- Key Laboratory of Green Printing
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- P. R. China
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