1
|
Bai S, Chen K, Huang W, Wang P, Chen X, Chen P. Thermo‐oxidative degradation of ultrahigh molecular weight poly(ethylene oxide) in volatile organic solvents. POLYM ADVAN TECHNOL 2023. [DOI: 10.1002/pat.5913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shishun Bai
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing China
| | - Kuo Chen
- Department of Polymer Science and Engineering University of Massachusetts Amherst Massachusetts USA
| | - Wei Huang
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China
| | - Peng Wang
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China
| | - Xun Chen
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China
| | - Peng Chen
- Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China
| |
Collapse
|
2
|
Hasan N, Busse K, Ullah A, Hussain H, Kressler J. Formation of Surface Wrinkles in Collapsed Langmuir Films of a Polyhedral Oligomeric Silsesquioxane Containing Diblock Copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13399-13408. [PMID: 34724380 DOI: 10.1021/acs.langmuir.1c02082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Surface pressure versus mean molecular area isotherms of Langmuir films of a hybrid diblock copolymer of poly(ethylene glycol) (PEG) and poly(methacrylo polyhedral oligomeric silsesquioxane) P(MA-POSS) together with Brewster angle microscopy reveal details of the phase transitions. The formation of a periodic wrinkling pattern in collapsed films is observed by epifluorescence microscopy after applying several compression-expansion cycles above the surface pressure of ≈18 mN/m. The wrinkle formation is reversible upon compression and expansion of the Langmuir films. Two distinct orientations of POSS molecules are assumed in Langmuir films upon compression, vertically for chains close to the water surface and horizontally orientated upper layers with significant amounts of PEG in between them. Thus, the wrinkling forms mainly in the top stiffer MA-POSS blocks above a certain compressional stress. The wrinkles disappear during the Langmuir-Blodgett (LB) transfer. Nevertheless, atomic force microscopy and grazing incidence wide-angle X-ray scattering experiments reveal the formation of highly ordered POSS molecules in LB films.
Collapse
Affiliation(s)
- Nazmul Hasan
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Karsten Busse
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| | - Asad Ullah
- Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad 45320, Pakistan
| | - Hazrat Hussain
- Department of Chemistry, Quaid-i-Azam University Islamabad, Islamabad 45320, Pakistan
| | - Jörg Kressler
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle (Saale), Germany
| |
Collapse
|
3
|
Amado E, Hasan N, Busse K, Kressler J. Microscopic Characterization of Poly(Sulfur Nitride). MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100113] [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)
- Elkin Amado
- Department of Chemistry Martin Luther University Halle‐Wittenberg Halle (Saale) D‐06120 Germany
| | - Nazmul Hasan
- Department of Chemistry Martin Luther University Halle‐Wittenberg Halle (Saale) D‐06120 Germany
| | - Karsten Busse
- Department of Chemistry Martin Luther University Halle‐Wittenberg Halle (Saale) D‐06120 Germany
| | - Jörg Kressler
- Department of Chemistry Martin Luther University Halle‐Wittenberg Halle (Saale) D‐06120 Germany
| |
Collapse
|
4
|
Guyot M, Daurat C, Vuillet-A-Ciles V, Pontille L, Le Porcher B, Chiriac R, Toche F, Chassagneux F, Toury B, Bois L. Foam Silica Films Synthesized by Calcium Chloride-Assisted Emulsification. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4540-4549. [PMID: 33830769 DOI: 10.1021/acs.langmuir.1c00083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The development of porous films with an accessible high specific surface area is important for designing new adsorbents, sensors, or catalyst supports. Here, we describe a simple method to prepare a silica foam coating using a calcium chloride-assisted evaporation-induced emulsification method. An alcoholic silica sol containing calcium chloride and a poly(ethylene oxide)-based polymer is deposited on a substrate by dipping. The evaporation of the alcohol induces a phase separation between the silica-rich phase and the calcium-rich one. The size of the droplets increases via a coalescence process until the gelation of the sol, which determines the final pore size between 100 nm and 3 μm. Thermal analysis and monitoring of droplet evaporation confirm that the departure of the solvent is delayed by the presence of calcium chloride in the sol. The influence of the nature of the polymer on the porosity is discussed. The use of a block copolymer such as the Pluronic F-127, which strongly stabilizes the emulsion, allows to reach a low pore size (400 nm), while on the contrary, we propose to use a short poly(ethylene glycol) (PEG) such as PEG-400, which weakly stabilizes it, leading to larger pores (2-3 μm). Furthermore, we show that the addition of a zirconium salt (ZrOCl2·8H2O) to the silica sol accelerates the condensation step of the silica and leads to the decrease in the pore size.
Collapse
Affiliation(s)
- Mélanie Guyot
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Céline Daurat
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Victor Vuillet-A-Ciles
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Laurie Pontille
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Bastien Le Porcher
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Rodica Chiriac
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - François Toche
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Fernand Chassagneux
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Bérangère Toury
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| | - Laurence Bois
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Laboratoire des Multimatériaux et Interfaces, F-69622 Villeurbanne, France
| |
Collapse
|
5
|
Hasan N, Busse K, Haider T, Wurm FR, Kressler J. Crystallization of Poly(ethylene)s with Regular Phosphoester Defects Studied at the Air-Water Interface. Polymers (Basel) 2020; 12:E2408. [PMID: 33086637 PMCID: PMC7650800 DOI: 10.3390/polym12102408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/14/2020] [Accepted: 10/16/2020] [Indexed: 11/16/2022] Open
Abstract
Poly(ethylene) (PE) is a commonly used semi-crystalline polymer which, due to the lack of polar groups in the repeating unit, is not able to form Langmuir or Langmuir-Blodgett (LB) films. This problem can be solved using PEs with hydrophilic groups arranged at regular distances within the polymer backbone. With acyclic diene metathesis (ADMET) polymerization, a tool for precise addition of polar groups after a certain interval of methylene sequence is available. In this study, we demonstrate the formation of Langmuir/LB films from two different PEs with regular phosphoester groups, acting as crystallization defects in the main chain. After spreading the polymers from chloroform solution on the water surface of a Langmuir trough and solvent evaporation, the surface pressure is recorded during compression under isothermal condition. These π-A isotherms, surface pressure π vs. mean area per repeat unit A, show a plateau zone at surface pressures of ~ (6 to 8) mN/m, attributed to the formation of crystalline domains of the PEs as confirmed by Brewster angle and epifluorescence microscopy. PE with ethoxy phosphoester defects (Ethoxy-PPE) forms circular shape domains, whereas Methyl-PPE-co-decadiene with methyl phosphoester defects and two different methylene sequences between the defects exhibits a film-like morphology. The domains/films are examined by atomic force microscopy after transferring them to a solid support. The thickness of the domains/films is found in the range from ~ (2.4 to 3.2) nm depending on the transfer pressure. A necessity of chain tilt in the crystalline domains is also confirmed. Grazing incidence X-ray scattering measurements in LB films show a single Bragg reflection at a scattering vector qxy position of ~ 15.1 nm-1 known from crystalline PE samples.
Collapse
Affiliation(s)
- Nazmul Hasan
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle, Germany; (N.H.); (K.B.)
| | - Karsten Busse
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle, Germany; (N.H.); (K.B.)
| | - Tobias Haider
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany;
| | - Frederik R. Wurm
- Sustainable Polymer Chemistry Group, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;
| | - Jörg Kressler
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, D-06099 Halle, Germany; (N.H.); (K.B.)
| |
Collapse
|
6
|
Hasan N, Fuchs C, Schwieger C, Busse K, Dolynchuk O, Kressler J. Crystallization of poly(ε-caprolactone) at the air-water interface studied by IRRAS and GI-WAXS. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
7
|
Narayanan T, Konovalov O. Synchrotron Scattering Methods for Nanomaterials and Soft Matter Research. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E752. [PMID: 32041363 PMCID: PMC7040635 DOI: 10.3390/ma13030752] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/29/2020] [Accepted: 01/31/2020] [Indexed: 12/17/2022]
Abstract
This article aims to provide an overview of broad range of applications of synchrotron scattering methods in the investigation of nanoscale materials. These scattering techniques allow the elucidation of the structure and dynamics of nanomaterials from sub-nm to micron size scales and down to sub-millisecond time ranges both in bulk and at interfaces. A major advantage of scattering methods is that they provide the ensemble averaged information under in situ and operando conditions. As a result, they are complementary to various imaging techniques which reveal more local information. Scattering methods are particularly suitable for probing buried structures that are difficult to image. Although, many qualitative features can be directly extracted from scattering data, derivation of detailed structural and dynamical information requires quantitative modeling. The fourth-generation synchrotron sources open new possibilities for investigating these complex systems by exploiting the enhanced brightness and coherence properties of X-rays.
Collapse
|
8
|
Markwart JC, Suraeva O, Haider T, Lieberwirth I, Graf R, Wurm FR. Defect engineering of polyethylene-like polyphosphoesters: solid-state NMR characterization and surface chemistry of anisotropic polymer nanoplatelets. Polym Chem 2020. [DOI: 10.1039/d0py01352h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Polyethylene-like polyphosphoesters crystallized from dilute solution into anisotropic nanoplatelets. As proven by solid-state NMR, the phosphate groups are expelled to the surface and on-surface chemistry was conducted leaving the crystals intact.
Collapse
Affiliation(s)
| | - Oksana Suraeva
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Tobias Haider
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | | | - Robert Graf
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
| | - Frederik R. Wurm
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
- “Sustainable Polymer Chemistry”
- MESA+ Institute for Nanotechnology
| |
Collapse
|