1
|
Parisi D, Truzzolillo D, Slim AH, Dieudonné-George P, Narayanan S, Conrad JC, Deepak VD, Gauthier M, Vlassopoulos D. Gelation and Re-entrance in Mixtures of Soft Colloids and Linear Polymers of Equal Size. Macromolecules 2023; 56:1818-1827. [PMID: 36938509 PMCID: PMC10019458 DOI: 10.1021/acs.macromol.2c02491] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 02/02/2023] [Indexed: 02/24/2023]
Abstract
Liquid mixtures composed of colloidal particles and much smaller non-adsorbing linear homopolymers can undergo a gelation transition due to polymer-mediated depletion forces. We now show that the addition of linear polymers to suspensions of soft colloids having the same hydrodynamic size yields a liquid-to-gel-to-re-entrant liquid transition. In particular, the dynamic state diagram of 1,4-polybutadiene star-linear polymer mixtures was determined with the help of linear viscoelastic and small-angle X-ray scattering experiments. While keeping the star polymers below their nominal overlap concentration, a gel was formed upon increasing the linear polymer content. Further addition of linear chains yielded a re-entrant liquid. This unexpected behavior was rationalized by the interplay of three possible phenomena: (i) depletion interactions, driven by the size disparity between the stars and the polymer length scale which is the mesh size of its entanglement network; (ii) colloidal deswelling due to the increased osmotic pressure exerted onto the stars; and (iii) a concomitant progressive suppression of the depletion efficiency on increasing the polymer concentration due to reduced mesh size, hence a smaller range of attraction. Our results unveil an exciting new way to tailor the flow of soft colloids and highlight a largely unexplored path to engineer soft colloidal mixtures.
Collapse
Affiliation(s)
- Daniele Parisi
- FORTH,
Institute of Electronic Structure and Laser, Heraklion 70013, Crete, Greece
- Department
of Chemical Engineering, Product Technology, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
| | - Domenico Truzzolillo
- Laboratoire
Charles Coulomb (L2C), UMR 5221 CNRS Université de Montpellier, Montpellier 34095, France
| | - Ali H. Slim
- Department
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | | | - Suresh Narayanan
- Advanced
Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Jacinta C. Conrad
- Department
of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Vishnu D. Deepak
- Department
of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Mario Gauthier
- Department
of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Dimitris Vlassopoulos
- FORTH,
Institute of Electronic Structure and Laser, Heraklion 70013, Crete, Greece
- Department
of Materials Science and Technology, University
of Crete, Heraklion 70013, Crete, Greece
| |
Collapse
|
2
|
Yu X, Hong H, Li X, Zhao J, Qian H, Li S, Lin Z. The effect of Polysulfone (PSU) grafting copolymers on improving the processability of its composites. JOURNAL OF POLYMER RESEARCH 2023. [DOI: 10.1007/s10965-023-03459-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
3
|
Zhang N, Wang C, Chen H, Wu J, Han CC, Xu S. Electrospun Fibrous Membrane with Confined Chain Configuration: Dynamic Relaxation and Glass Transition. Polymers (Basel) 2022; 14:polym14050939. [PMID: 35267762 PMCID: PMC8912690 DOI: 10.3390/polym14050939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/18/2022] [Accepted: 02/23/2022] [Indexed: 11/19/2022] Open
Abstract
Thermodynamic glass transition processes of electrospun membranes were first introduced to study their dynamic relaxation nature, which is not constantly in equilibrium. The relaxation modes of electrospun membranes are slow but measurable near and above the Tg, given the stretched chain over long distances. Based on differential scanning calorimetry (DSC) experiments and the general principle of mode-coupling theory (MCT), endothermic peak temperature and relaxation enthalpy were used to analyze the relaxation process by capturing these instantaneous “arrested” structures. The short- and long-wavelength relaxation modes could be identified with different annealing times and temperatures relative to DSC-measured Tg for electrospun membranes with different molecular weights. Results clearly showed the dynamic nature of a glass transition in polymeric materials. Tp and enthalpy loss initially increased and then directly decreased with the increase in annealing time. When Ta > Tg, regardless of the size of the molecular weight, the Tp and enthalpy loss of the PLGA fibers would directly decrease, and the curves would shift toward the melted one. Combination of electrospinningand normal DSC instrument can be used to investigating the dynamic relax process through an adequately designed kinetic scanning procedure. This result can be explained by the general principle of MCT-type dynamic theory.
Collapse
Affiliation(s)
- Nuozi Zhang
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (N.Z.); (C.W.); (H.C.); (J.W.); (C.C.H.)
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Chenhong Wang
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (N.Z.); (C.W.); (H.C.); (J.W.); (C.C.H.)
- State Key Laboratory of Polymer Physics and Chemistry, Joint Laboratory of Polymer Science and Materials, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hao Chen
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (N.Z.); (C.W.); (H.C.); (J.W.); (C.C.H.)
| | - Jiaen Wu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (N.Z.); (C.W.); (H.C.); (J.W.); (C.C.H.)
| | - Charles C. Han
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (N.Z.); (C.W.); (H.C.); (J.W.); (C.C.H.)
| | - Shanshan Xu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China; (N.Z.); (C.W.); (H.C.); (J.W.); (C.C.H.)
- Correspondence:
| |
Collapse
|
4
|
The Relationship between Free Volume and Cooperative Rearrangement: From the Temperature-Dependent Neutron Total Scattering Experiment of Polystyrene. Polymers (Basel) 2021; 13:polym13183042. [PMID: 34577943 PMCID: PMC8470135 DOI: 10.3390/polym13183042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/05/2021] [Accepted: 09/06/2021] [Indexed: 11/17/2022] Open
Abstract
Although many theories have been proposed to describe the nature of glass formation, its microscopic picture is still missing. Here, by a combination of neutron scattering and molecular dynamics simulation, we present the temperature-dependent atomic structure variation of polystyrene at the glass formation, free volume and cooperative rearrangement. When it is close to glass formation, the polymer is confined in tubes, whose diameter is the main chain–main chain distance, in a “static cage” from its neighbors. This definition can not only account for the kinetic pathway dependence of Williams-Landel-Ferry (WLF) free volume, but also be testified in a set of six polymers. However, the free volume which allows a monomer to move cannot be found in any frame of its real-space image. Monomers, thus, have to move cooperatively to be out of the cage. During glass formation, dynamic heterogeneity develops, and string-like cooperative rearrangement region (CRR) grows over a long range of time and length scales. All of these CRRs tend to walk through loose “static cages”. Our observation unifies the concepts of free volume and cooperative rearrangement. The former is a statistical average leading to a polydisperse “static cage” formation; while a loose “static cage” provides the way that CRRs move.
Collapse
|
5
|
Parisi D, Truzzolillo D, Deepak VD, Gauthier M, Vlassopoulos D. Transition from Confined to Bulk Dynamics in Symmetric Star–Linear Polymer Mixtures. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00188] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | - Domenico Truzzolillo
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS Université de Montpellier, 34095 Montpellier, France
| | - Vishnu D. Deepak
- Department of Chemistry, University of Waterloo, N2L 3G1 Waterloo, Ontario, Canada
| | - Mario Gauthier
- Department of Chemistry, University of Waterloo, N2L 3G1 Waterloo, Ontario, Canada
| | | |
Collapse
|
6
|
Yan B, Shen H, Fan D, Tao Y, Wu Y, Wang M, Zhao J, Zhang H. Microwave treatment regulates the free volume of rice starch. Sci Rep 2019; 9:3876. [PMID: 30846823 PMCID: PMC6405908 DOI: 10.1038/s41598-019-40598-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 02/19/2019] [Indexed: 11/21/2022] Open
Abstract
The aim of this work was to investigate the role of microwave parameters and moisture content on the free volume (FV) changes of rice starch by positron annihilation lifetime spectroscopy analysis (PALS) and to explore the potential relationship between the changes of FV and physicochemical properties of rice starch. Microwave heating and water molecules lead to the increasing of FV of starch. However, this result is largely influenced by the plasticization of water molecule. The anti-plasticization caused by water evaporation resulting in a decrease in the size and concentration of FV during microwave heating. Significant decrease (p < 0.05) in the thickness of amorphous region of microwave-heated rice starch was found by small angle X-ray scattering (SAXS), and the glass transition temperature (Tg) and gelatinization temperature significantly increase (p < 0.05) after microwave heating. According to correlation analysis, the power intensity and heating time were correlated negatively with the lifetime of o-Ps. In addition, the changes of amorphous region and Tg of rice starch were strongly related to FV changes. These results provided a theoretical basis for further research on the directional regulation of FV and improvement the quality of starch-based food by using microwave treatment.
Collapse
Affiliation(s)
- Bowen Yan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Huijie Shen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Daming Fan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, Hong Kong, China.
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, China.
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Wuxi, 214122, China.
| | - Yuan Tao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Yejun Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Mingfu Wang
- School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong SAR, Hong Kong, China.
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Wuxi, 214122, China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi, 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Wuxi, 214122, China
| |
Collapse
|
7
|
Jia D, Cheng H, Han CC. Interplay between Caging and Bonding in Binary Concentrated Colloidal Suspensions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3021-3029. [PMID: 29424544 DOI: 10.1021/acs.langmuir.7b03965] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
When a liquid becomes dynamically arrested, a gel, a repulsive glass, or an attractive glass state will form. Bonding and caging mechanisms decide their static structures and dynamic properties. To better understand their interplay, the competition between bonding and caging in a binary mixture of polystyrene core/poly( N-isopropylacrylamide) shell (CS) microgels and sulfonated polystyrene (PSS) particles is studied. CS microgels have short-range attraction above the volume phase transition temperature, whereas PSS species experiences relatively long-range electrostatic repulsion. Adding more PSS into the binary mixture will, of course, increase the total effective volume fraction but lead to different properties in gel or glass states. For instance, in gels, it increases the localization length and weakens the gel, whereas in glass, it decreases the localization length and strengthens the glass. This thus implies that the static and dynamic properties of gels are mainly controlled by bonding and those of both repulsive and attractive glasses are governed by caging. On the other hand, increasing the temperature will decrease the effective volume fraction because of the volume phase transition of the CS microgels. A discontinuous repulsive glass-to-liquid-to-gel transition can be observed when the PSS concentration is low, but a continuous repulsive glass-to-gel transition can also be observed with the increase of the PSS concentration. This may hint that glass transition and physical gelation share a similar mechanism, whereas the former has a longer relaxation time.
Collapse
Affiliation(s)
- Di Jia
- China Spallation Neutron Source (CSNS) , Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS) , Dongguan 523803 , China
- Dongguan Institute of Neutron Science (DINS) , Dongguan 523808 , China
| | - He Cheng
- China Spallation Neutron Source (CSNS) , Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS) , Dongguan 523803 , China
- Dongguan Institute of Neutron Science (DINS) , Dongguan 523808 , China
| | - Charles C Han
- Institute for Advanced Study , Shenzhen University , Shenzhen 518060 , China
| |
Collapse
|