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Resmerita A, Asandulesa M, Farcas A. Evaluation of the Chemical, Morphological and Dielectric Properties of Supramolecular Networks Consisting of Polyethylene Glycol Polyrotaxanes and Polystyrene/Semi‐Rotaxane with Hydroxypropyl‐
β
‐Cyclodextrins. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ana‐Maria Resmerita
- “Petru Poni” Institute of Macromolecular Chemistry 41 A, Grigore Ghica Voda Alley Iasi 700487 Romania
| | - Mihai Asandulesa
- “Petru Poni” Institute of Macromolecular Chemistry 41 A, Grigore Ghica Voda Alley Iasi 700487 Romania
| | - Aurica Farcas
- “Petru Poni” Institute of Macromolecular Chemistry 41 A, Grigore Ghica Voda Alley Iasi 700487 Romania
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Sang G, Xu P, Yan T, Murugadoss V, Naik N, Ding Y, Guo Z. Interface Engineered Microcellular Magnetic Conductive Polyurethane Nanocomposite Foams for Electromagnetic Interference Shielding. NANO-MICRO LETTERS 2021; 13:153. [PMID: 34236560 PMCID: PMC8266988 DOI: 10.1007/s40820-021-00677-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/15/2021] [Indexed: 05/27/2023]
Abstract
Lightweight microcellular polyurethane (TPU)/carbon nanotubes (CNTs)/ nickel-coated CNTs (Ni@CNTs)/polymerizable ionic liquid copolymer (PIL) composite foams are prepared by non-solvent induced phase separation (NIPS). CNTs and Ni@CNTs modified by PIL provide more heterogeneous nucleation sites and inhibit the aggregation and combination of microcellular structure. Compared with TPU/CNTs, the TPU/CNTs/PIL and TPU/CNTs/Ni@CNTs/PIL composite foams with smaller microcellular structures have a high electromagnetic interference shielding effectiveness (EMI SE). The evaporate time regulates the microcellular structure, improves the conductive network of composite foams and reduces the microcellular size, which strengthens the multiple reflections of electromagnetic wave. The TPU/10CNTs/10Ni@CNTs/PIL foam exhibits slightly higher SE values (69.9 dB) compared with TPU/20CNTs/PIL foam (53.3 dB). The highest specific EMI SE of TPU/20CNTs/PIL and TPU/10CNTs/10Ni@CNTs/PIL reaches up to 187.2 and 211.5 dB/(g cm-3), respectively. The polarization losses caused by interfacial polarization between TPU substrates and conductive fillers, conduction loss caused by conductive network of fillers and magnetic loss caused by Ni@CNT synergistically attenuate the microwave energy.
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Affiliation(s)
- Guolong Sang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Pei Xu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009, People's Republic of China.
| | - Tong Yan
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Vignesh Murugadoss
- Advanced Materials Division, Engineered Multifunctional Composites (EMC) Nanotech. LLC, Knoxville, TN, 37934, USA
- Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA
| | - Nithesh Naik
- Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Yunsheng Ding
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA.
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Yuan H, Pan Y, Wang X, Chen Q, Hu Q, Shao C, Guo Z, Liu C, Shen C, Liu X. Simple water tunable polyurethane microsphere for super-hydrophobic dip-coating and oil-water separation. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122833] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wu L, Wang L, Guo Z, Luo J, Xue H, Gao J. Durable and Multifunctional Superhydrophobic Coatings with Excellent Joule Heating and Electromagnetic Interference Shielding Performance for Flexible Sensing Electronics. ACS APPLIED MATERIALS & INTERFACES 2019; 11:34338-34347. [PMID: 31441631 DOI: 10.1021/acsami.9b11895] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Superhydrophobic coatings have wide applications in many fields. However, superhydrophobic and smart coatings with multifunctionality and their applications in flexible sensing electronics are seldom reported. In this work, durable, superhydrophobic, and anticorrosive coatings with excellent Joule heating and electromagnetic interference (EMI) shielding performance are prepared on the basis of Ag precursor reduction and synchronous nonsolvent induced phase separation. Silver nanoparticles (AgNPs) coated with the copolymer (polystyrene-block-poly(ethylene-co-butylene)-block-polystyrene: SEBS) are uniformly distributed on the target substrate, forming mechanically durable conductive network. SEBS could not only endow the surface coating with superhydrophobicity but also improve the interaction among individual Ag nanoparticles and the interfacial adhesion between AgNPs and the substrate. The multifunctional coating possesses excellent anticorrosive, self-cleaning, and deicing properties. The high conductivity endows the coatings with excellent Joule heating and EMI shielding performance. The multifunctional coating can be applied to a variety of different substrates with outstanding surface stability and reliability. The conductivity for the smart coating can reach as high as 107 S/cm with the EMI shielding effectiveness up to 37.8 dB. At a low applied voltage of 1 V, the conductive fabric can be heated up to over 80 °C in 60 s and displays good recyclability during dozens of heating and cooling cycles. The Joule heating-induced temperature increase could be used for efficient surface deicing. When used for the flexible and wearable strain sensors, the multifunctional coating has a very low strain detection limit of 0.5% and large sensitivity (with the gauge factor as high as 1075) and excellent repeatability. In addition, it can be used for precisely monitoring different body motions, including both large and subtle joint movement.
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Affiliation(s)
- Lisheng Wu
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Ling Wang
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Zheng Guo
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Junchen Luo
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Huaiguo Xue
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
| | - Jiefeng Gao
- School of Chemistry and Chemical Engineering , Yangzhou University , Yangzhou , Jiangsu 225002 , China
- State Key Laboratory of Polymer Materials Engineering , Sichuan University , Chengdu , Sichuan 610065 , China
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Nie W, Gao Y, McCoul DJ, Gillispie GJ, Zhang Y, Liang L, He C. Rapid mineralization of hierarchical poly(l-lactic acid)/poly(ε-caprolactone) nanofibrous scaffolds by electrodeposition for bone regeneration. Int J Nanomedicine 2019; 14:3929-3941. [PMID: 31213809 PMCID: PMC6549790 DOI: 10.2147/ijn.s205194] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 04/16/2019] [Indexed: 11/23/2022] Open
Abstract
Introduction: Hierarchical nanofibrous scaffolds are emerging as a promising bone repair material due to their high cell adhesion activity and nutrient permeability. However, the existing method for hierarchical nanofibrous scaffolds fabrication is complicated and not perfectly suitable for further biomedical application in view of both structure and function. In this study, we constructed a hierarchical nanofibrous poly (l-lactic acid)/poly(ε-caprolactone) (PLLA/PCL) scaffold and further evaluated its bone healing ability. Methods: The hierarchical PLLA/PCL nanofibrous scaffold (PLLA/PCL) was prepared by one-pot TIPS and then rapidly mineralized at room temperature by an electrochemical deposition technique. After electrode-positioning at 2 V for 2 hrs, a scaffold coated with hydroxyapatite (M-PLLA/PCL) could be obtained. Results: The pore size of the M-PLLA/PCL scaffold was hierarchically distributed so as to match the biophysical structure for osteoblast growth. The M-PLLA/PCL scaffold showed better cell proliferation and osteogenesis activity compared to the PLLA/PCL scaffold. Further in vivo bone repair studies indicated that the M-PLLA/PCL scaffold could accelerate defect healing in 12 weeks. Conclusion: The results of this study implied that the as-prepared hydroxyapatite coated hierarchical PLLA/PCL nanofibrous scaffolds could be developed as a promising material for efficient bone tissue repair after carefully tuning the TIPS and electrodeposition parameters.
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Affiliation(s)
- Wei Nie
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai201620, People’s Republic of China
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston Salem, NC27103, USA
| | - Yiming Gao
- Department of Plastic and Cosmetic Surgery, Shanghai Traditional Chinese Medicine University Affiliated Shuguang Hospital, Shanghai201203, People’s Republic of China
| | - David James McCoul
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston Salem, NC27103, USA
| | - Gregory James Gillispie
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Winston Salem, NC27103, USA
| | - YanZhong Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai201620, People’s Republic of China
| | - Li Liang
- Department of Respiratory Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai201999, People’s Republic of China
| | - ChuangLong He
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai201620, People’s Republic of China
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Huo J, Chen Z, Zhou J. Zwitterionic Membrane via Nonsolvent Induced Phase Separation: A Computer Simulation Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1973-1983. [PMID: 30056719 DOI: 10.1021/acs.langmuir.8b01786] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Dissipative particle dynamics (DPD) was adopted to study the nonsolvent induced phase separation (NIPS) process during a pH-responsive poly(ether sulfone) membrane preparation with a zwitterionic copolymer poly(ether sulfone)- block-polycarboxybetaine methacrylate (PES-b-PCBMA) as the blending additive. The membrane formation process and final morphology were analyzed. Simulation results show that the hydrophilic PCBMA segments enrich on the membrane surface by surface segregation and exhibit pH-responsive behavior, which is attributed to the deprotonation of the carboxylic acid group. With the polymer concentration increasing, both the shrinkage of the membrane and the flexibility of the system decrease, which also reduce the effect of surface segregation. By adjusting the blend ratio of PES-b-PCBMA with PES from 5% to 15%, the surface coverage of PCBMA segments on the membrane can be regulated. This work contributes to a better understanding on the mechanism of NIPS and can serve as a guide for the design of the polymer blend membrane.
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Affiliation(s)
- Jinhao Huo
- Guangdong Provincial Key Laboratory for Green Chemical Product technology, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Zheng Chen
- Guangdong Provincial Key Laboratory for Green Chemical Product technology, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , China
| | - Jian Zhou
- Guangdong Provincial Key Laboratory for Green Chemical Product technology, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou 510640 , China
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Sharratt WN, Brooker A, Robles ESJ, Cabral JT. Microfluidic solvent extraction of poly(vinyl alcohol) droplets: effect of polymer structure on particle and capsule formation. SOFT MATTER 2018; 14:4453-4463. [PMID: 29697110 DOI: 10.1039/c7sm02488f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
We investigate the formation of poly(vinyl alcohol) microparticles by the selective extraction of aqueous polymer solution droplets, templated by microfluidics and subsequently immersed in a non-solvent bath. The role of polymer molecular mass (18-105 kg mol-1), degree of hydrolysis (88-99%) and thus solubility, and initial solution concentration (0.01-10% w/w) are quantified. Monodisperse droplets with radii ranging from 50 to 500 μm were produced at a flow-focusing junction with carrier phase hexadecane and extracted into ethyl acetate. Solvent exchange and extraction result in droplet shrinkage, demixing, coarsening and phase-inversion, yielding polymer microparticles with well-defined dimensions and internal microstructure. Polymer concentration, varied from below the overlap concentration c* to above the concentrated crossover c**, as estimated by viscosity measurements, was found to have the largest impact on the final particle size and extraction timescale, while polymer mass and hydrolysis played a secondary role. These results are consistent with the observation that the average polymer concentration upon solidification greatly exceeds c**, and that the internal microparticle porosity is largely unchanged. However, reducing the initial polymer concentration to well below c* (approximately 100×) and increasing droplet size yields thin-walled (100's of nm) capsules which controllably crumple upon extraction. The symmetry of the process can be readily broken by imposing extraction conditions at an impermeable surface, yielding large, buckled, cavity morphologies. Based on these results, we establish robust design criteria for polymer capsules and particles, demonstrated here for poly(vinyl alcohol), with well-defined shape, dimensions and internal microstructure.
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Affiliation(s)
- W N Sharratt
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
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