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Yarysheva A, Arzhakova O. Modification of High-Density Polyethylene with a Fibrillar-Porous Structure by Biocompatible Polyvinyl Alcohol via Environmental Crazing. Polymers (Basel) 2024; 16:1184. [PMID: 38732652 PMCID: PMC11085468 DOI: 10.3390/polym16091184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/12/2024] [Accepted: 04/19/2024] [Indexed: 05/13/2024] Open
Abstract
Polymer/polymer nanocomposites based on high-density polyethylene (HDPE) and biocompatible polyvinyl alcohol (PVA) were prepared by tensile drawing of HDPE in the PVA solutions via environmental crazing. The mechanism of this phenomenon was described. The HDPE/PVA nanocomposites were studied by the methods of scanning electron microscopy, atomic force microscopy, gravimetry, tensile tests, and their composition, properties, and performance were characterized. The content of PVA in the HDPE/PVA nanocomposites (up to 22 wt.%) was controlled by the tensile strain of HDPE and concentration of PVA in the solution. Depending on the content of PVA, the wettability of the HDPE/PVA nanocomposite (hydrophilic-lipophilic balance) could be varied in a broad interval from 45 to 98°. The modification of HDPE by the biocompatible PVA offers a beneficial avenue for practical applications of the HDPE/PVA composites as biomedical materials, packaging and protective materials, modern textile articles, breathable materials, membranes and sorbents, etc.
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Affiliation(s)
- Alena Yarysheva
- Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia;
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Li X. ipyChord: a package for evaluating small-angle X-ray scattering data of fiber symmetry. J Appl Crystallogr 2021. [DOI: 10.1107/s1600576721001369] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
This article presents a Python-based package, ipyChord, to compute the 2D chord distribution function (CDF) from the small-angle X-ray scattering (SAXS) pattern from polymer materials with fiber-symmetrical nanostructure. The program allows construction of a harmonized SAXS pattern from a raw SAXS pattern, by normalization of the incident-beam intensity, absorption correction for sample thickness, masking blind areas on the detector, and filling in the shadow of the beamstop and its holder using symmetry operations. Patterns from modular detectors with inter-module gaps can still be fully constructed satisfactorily after determining the optimized beam position and a radial basis function. A CDF pattern computed from the full SAXS pattern can be used to determine the domain size and its variability using a graphical method. An interface distribution function computed from Bonart's longitudinal projection or sliced from a CDF meridian can quantify differently stacked hard and soft domains. Two cases of the application of ipyChord are presented. The software is open source and available at https://github.com/isaxs/ipyChord.
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Rabiei N, Haghighat Kish M. Extraction of nanofibers from polymer blends: A brief review. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4526] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Navid Rabiei
- Department of Textile Engineering; Amirkabir University of Technology; Tehran Iran
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Kwon OH, Ha T, Kim DG, Kim BG, Kim YS, Shin TJ, Koh WG, Lim HS, Yoo Y. Anisotropy-Driven High Thermal Conductivity in Stretchable Poly(vinyl alcohol)/Hexagonal Boron Nitride Nanohybrid Films. ACS APPLIED MATERIALS & INTERFACES 2018; 10:34625-34633. [PMID: 30216038 DOI: 10.1021/acsami.8b12075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Controlling the anisotropy of two-dimensional materials with orientation-dependent heat transfer characteristics is a possible solution to resolve severe thermal issues in future electronic devices. We demonstrate a dramatic enhancement in the in-plane thermal conductivity of stretchable poly(vinyl alcohol) (PVA) nanohybrid films containing small amounts (below 10 wt %) of hexagonal boron nitride ( h-BN) nanoplatelets. The h-BN nanoplatelets were homogeneously dispersed in the PVA polymer solution by ultrasonication without additional surface modification. The mixture was used to prepare thermally conductive nanocomposite films. The in-plane thermal conductivity of the resulting PVA/ h-BN nanocomposite films increased to 6.4 W/mK when the strain was increased from 0 to 100% in the horizontal direction. More specifically, the thermal conductivity of a PVA/ h-BN composite film with 10 wt % filler loading can be improved by up to 32 times as compared to pristine PVA. This outstanding thermal conductivity value is significantly larger than that of materials currently used in in-plane thermal management systems. This result is attributed to the anisotropic alignment of h-BN particles in the PVA chain matrix during stretching, enhancing phonon conductive paths and hence improving the thermal conductivity and thermal properties of PVA/ h-BN nanocomposite films. These polymer nanocomposites have low cost as the amount of expensive conductive fillers is reduced and can be potentially used as high-performance materials for thermal management systems such as heat sink and thermal interface materials, for future electronic and electrical devices.
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Affiliation(s)
- O Hwan Kwon
- Division of Advanced Materials , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
- Department of Chemical and Biomolecular Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Taeyong Ha
- Division of Advanced Materials , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
- Department of Chemical and Biomolecular Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Dong-Gyun Kim
- Division of Advanced Materials , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
- Department of Chemical Convergence Materials , University of Science & Technology , Daejeon 34113 , Republic of Korea
| | - Byoung Gak Kim
- Division of Advanced Materials , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
- Department of Chemical Convergence Materials , University of Science & Technology , Daejeon 34113 , Republic of Korea
| | - Yong Seok Kim
- Division of Advanced Materials , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
- Department of Chemical Convergence Materials , University of Science & Technology , Daejeon 34113 , Republic of Korea
| | - Tae Joo Shin
- UNIST Central Research Facility , Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil , Ulsan 44919 , Republic of Korea
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering , Yonsei University , Seoul 03722 , Republic of Korea
| | - Ho Sun Lim
- Department of Chemical and Biological Engineering , Sookmyung Women's University , Seoul 04310 , Republic of Korea
| | - Youngjae Yoo
- Division of Advanced Materials , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
- Department of Chemical Convergence Materials , University of Science & Technology , Daejeon 34113 , Republic of Korea
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Zhang J, Feng W, Zhang H, Wang Z, Calcaterra HA, Yeom B, Hu PA, Kotov NA. Multiscale deformations lead to high toughness and circularly polarized emission in helical nacre-like fibres. Nat Commun 2016; 7:10701. [PMID: 26907888 PMCID: PMC4770083 DOI: 10.1038/ncomms10701] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 01/13/2016] [Indexed: 11/26/2022] Open
Abstract
Nacre-like composites have been investigated typically in the form of coatings or free-standing sheets. They demonstrated remarkable mechanical properties and are used as ultrastrong materials but macroscale fibres with nacre-like organization can improve mechanical properties even further. The fiber form or nacre can, simplify manufacturing and offer new functional properties unknown yet for other forms of biomimetic materials. Here we demonstrate that nacre-like fibres can be produced by shear-induced self-assembly of nanoplatelets. The synergy between two structural motifs--nanoscale brick-and-mortar stacking of platelets and microscale twisting of the fibres--gives rise to high stretchability (>400%) and gravimetric toughness (640 J g(-1)). These unique mechanical properties originate from the multiscale deformation regime involving solid-state self-organization processes that lead to efficient energy dissipation. Incorporating luminescent CdTe nanowires into these fibres imparts the new property of mechanically tunable circularly polarized luminescence. The nacre-like fibres open a novel technological space for optomechanics of biomimetic composites, while their continuous spinning methodology makes scalable production realistic.
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Affiliation(s)
- Jia Zhang
- Key Laboratory of Micro-systems and Micro-structures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin 150080, China
| | - Wenchun Feng
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
| | - Huangxi Zhang
- Key Laboratory of Micro-systems and Micro-structures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin 150080, China
| | - Zhenlong Wang
- Key Laboratory of Micro-systems and Micro-structures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin 150080, China
| | - Heather A. Calcaterra
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
| | - Bongjun Yeom
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
| | - Ping An Hu
- Key Laboratory of Micro-systems and Micro-structures Manufacturing, Ministry of Education, Harbin Institute of Technology, Harbin 150080, China
| | - Nicholas A. Kotov
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136, USA
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