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  • 1.
    Amiandamhen, Stephen
    et al.
    Linnaeus University, Sweden.
    Adamopoulos, Stergios
    SLU Swedish University of Agricultural Sciences, Sweden.
    Adl-Zarrabi, Bijan
    Chalmers University of Technology, Sweden.
    Yin, Haiyan
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Norén, Joakim
    RISE Research Institutes of Sweden, Built Environment, Building and Real Estate.
    Recycling sawmilling wood chips, biomass combustion residues, and tyre fibres into cement-bonded composites: Properties of composites and life cycle analysis2021In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 297, article id 123781Article in journal (Refereed)
    Abstract [en]

    This study investigated the properties and sustainability of cement-bonded composites containing industrial residues such as wood chips, tyre fibres and biomass combustion residues, i.e. bottom ash (BA) and fly ash (FA). The effect of cement-to-raw material (wood/tyre fibre) ratio (C/RM) and the aggregate content (BA and FA) on thermal and mechanical properties of the composites were investigated. Scanning electron microscopy (SEM) and life cycle analysis (LCA) were also conducted. The results revealed that as the aggregate content increased in wood composites, the mechanical properties also increased. The mean thermal conductivity and volumetric heat capacity of tyre composite samples were 0.37 W/mK and 1.2 MJ/m3K respectively, while the respective values for wood composite samples were 0.29 W/mK and 0.81 MJ/m3K. SEM analysis showed adequate bonding between wood/tyre fibres and cement matrix. LCA revealed that the materials share of the total primary energy use was about 60% for all analysed composites. © 2021 The Author(s)

  • 2.
    Wei, XF
    et al.
    KTH Royal Institute of Technology, Sweden.
    Hedenqvist, MS
    KTH Royal Institute of Technology, Sweden.
    Zhao, L
    KTH Royal Institute of Technology, Sweden.
    Barth, A
    Stockholm University, Sweden.
    Yin, Haiyan
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Risk for the release of an enormous amount of nanoplastics and microplastics from partially biodegradable polymer blends2022In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 24, p. 8742-8750Article in journal (Refereed)
    Abstract [en]

    Nanoplastics and microplastics (NMPs) in natural environments are an emerging global concern and understanding their formation processes from macro-plastic items during degradation/weathering is critical for predicting their quantities and impacts in different ecological systems. Here, we show the risk of enormous emissions of NMPs from polymer blends, a source that has not been specifically studied, by taking immiscible (most common case) partially biodegradable polymer blends as an example. The blends have the common “sea-island” morphology, where the minor non-biodegradable polymer phase (polyethylene and polypropylene) is dispersed as NMP particles in the major continuous biodegradable matrix (poly(ϵ-caprolactone)). The dispersed NMP particles with spherical and rod-like shapes are gradually liberated and released to the surrounding aquatic environment during the biodegradation of the matrix polymer. Strikingly, the number of released NMPs from the blend is very high. The blend film surface erosion process, induced by enzymatic hydrolysis of the matrix, involving fragmentation, hole formation, and hole wall detachment, was systematically investigated to reveal the NMP release process. Our findings present direct evidence and detailed insights into the high risk of emissions of NMPs from partially biodegradable immiscible polymer blends with a widespread “sea-island” morphology. Efforts from authorities, developers, manufacturers, and the public are needed to avoid the use of non-biodegradable polymers in blends with biodegradable polymers. 

  • 3.
    Wei, Xin-Feng
    et al.
    KTH Royal Institute of Technology, Sweden.
    Nilsson, Fritjof
    KTH Royal Institute of Technology, Sweden.
    Yin, Haiyan
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Hedenqvist, Mikael S
    KTH Royal Institute of Technology, Sweden.
    Microplastics Originating from Polymer Blends: An Emerging Threat?2021In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 55, no 8, p. 4190-4193Article in journal (Refereed)
    Abstract [en]

    No one can have missed the growing global environmental problems with plastics ending up as microplastics in food, water, and soil, and the associated effects on nature, wildlife, and humans. A hitherto not specifically investigated source of microplastics is polymer blends. A 1 g polymer blend can contain millions to billions of micrometer-sized species of the dispersed phase and therefore aging-induced fragmentation of the polymer blends can lead to the release of an enormous amount of microplastics. Especially if the stability of the dispersed material is higher than that of the surrounding matrix, the risk of microplastic migration is notable, for instance, if the matrix material is biodegradable and the dispersed material is not. The release can also be much faster if the matrix polymer is biodegradable. The purpose of writing this feature article is to arise public and academic attention to the large microplastic risk from polymer blends during their development, production, use, and waste handling.

  • 4.
    Yin, Haiyan
    et al.
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design. KTH Royal Institute of Technology, Sweden.
    Ringman, Rebecka
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Sedighi Moghaddam, Maziar
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Tuominen, Mikko
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Dėdinaitė, Andra
    RISE Research Institutes of Sweden, Bioeconomy and Health, Chemical Process and Pharmaceutical Development. KTH Royal Institute of Technology, Sweden.
    Wålinder, Magnus
    KTH Royal Institute of Technology, Sweden.
    Swerin, Agne
    Karlstad University, Sweden.
    Bardage, Stig
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Susceptibility of surface-modified superhydrophobic wood and acetylated wood to mold and blue stain fungi2023In: Progress in organic coatings, ISSN 0300-9440, E-ISSN 1873-331X, Vol. 182, article id 107628Article in journal (Refereed)
    Abstract [en]

    The susceptibility of surface-modified wood, surface-modified acetylated wood and acetylated wood to mold and blue stain fungi was investigated. The surface modifications were based on fluorinated and non-fluorinated silicone nanofilaments for increased hydrophobicity. Results showed an increased mold resistance of the surface-modified superhydrophobic wood with mold appearing later or with less intensity on the modified surfaces than on the untreated wood in accelerated mold chamber tests due to the increased water resistance of the samples. All acetylated wood samples exhibited good mold resistance as the available water in acetylated wood was reduced. The surface modifications on acetylated wood had a slightly negative effect on mold resistance due to side effects from the modification. The surface-modified wood showed high blue stain fungi coverage, whereas almost no blue stain fungi were observed on the acetylated wood and surface-modified acetylated wood. The surface-modified superhydrophobic wood showed high mold coverage after conditioning in a high-humidity environment or after exposure to UV irradiation. Meanwhile, the acetylated wood and surface-modified superhydrophobic acetylated wood showed a small amount of mold coverage in these conditions. © 2023 The Authors

  • 5.
    Yin, Haiyan
    et al.
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design. KTH Royal Institute of Technology, Sweden.
    Sedighi Moghaddam, Maziar
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Tuominen, Mikko
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Dėdinaitė, Andra
    KTH Royal Institute of Technology, Sweden.
    Wålinder, Magnus
    KTH Royal Institute of Technology, Sweden.
    Swerin, Agne
    KTH Royal Institute of Technology, Sweden; Karlstad University, Sweden.
    Non-fluorine surface modification of acetylated birch for improved water repellence2021In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 75, no 9, p. 857-Article in journal (Refereed)
    Abstract [en]

    In this work, a non-fluorinated surface treatment, i.e., hydrophobized silicone nanofilaments, was applied on both birch and acetylated birch wood samples via a gas-phase based reaction. A superhydrophobic behavior was observed on both the surface-modified samples as revealed by the static water contact angles (CAs) greater than 160°, also valid for samples prepared with the shortest reaction time of 1 h. The dynamic wettability behavior of the samples was studied by a multicycle Wilhelmy plate method. The surface-modified acetylated birch exhibited a pronounced enhanced water resistance, resulting in very low water uptake of 3 ± 1 wt% after 100 cycles, which was not only about 29 and 5 times lower than that of the non-surface-modified birch and acetylated birch, respectively, but also three times lower than that of the surface-modified birch. Moreover, the aesthetic appearance of the acetylated wood was maintained as the surface modification only resulted in a small color change. This work shows the potential of preparing super water-repellent wood by non-fluorinated surface modification. 

  • 6.
    Yin, Haiyan
    et al.
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design. KTH Royal Institute of Technology, Sweden.
    Sedighi Moghaddam, Maziar
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Tuominen, Mikko
    RISE Research Institutes of Sweden.
    Dėdinaitė, Andra
    RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.
    Wålinder, Magnus
    KTH Royal Institute of Technology, Sweden.
    Swerin, Agne
    Karlstad University, Sweden.
    Wettability performance and physicochemical properties of UV exposed superhydrophobized birch wood2022In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 584, article id 152528Article in journal (Refereed)
    Abstract [en]

    The effect of prolonged ultraviolet (UV) irradiation on the performance of superhydrophobized birch and acetylated birch wood was investigated. The surface modification of the wood was based on a newly developed method using silicone nanofilaments. The combination of surface modification and acetylation of wood showed good wetting resistance also after 600 h of UV exposure, with water contact angles greater than 140° and water uptake 30 times lower by weight than that of the non-surface-modified wood as determined by multicycle Wilhelmy plate measurements. Scanning electron microscopy images revealed that the silicone nanofilaments can still be observed on the wood samples after UV irradiation. The surface-modified wood samples exhibited significant color change after UV exposure. FTIR spectra showed that lignin was degraded on both the non-surface-modified wood surfaces and the wood surface-modified with the silicone nanofilaments. © 2022 The Authors

  • 7.
    Yin, Haiyan
    et al.
    RISE Research Institutes of Sweden, Bioeconomy and Health. KTH Royal Institute of Technology, Sweden.
    Sedighi Moghaddam, Maziar
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Tuominen, Mikko
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Eriksson, Mimmi
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design. KTH Royal Institute of Technology, Sweden.
    Järn, Mikael
    RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.
    Dėdinaitė, Andra
    RISE Research Institutes of Sweden. KTH Royal Institute of Technology, Sweden.
    Wålinder, Magnus
    KTH Royal Institute of Technology, Sweden.
    Swerin, Agne
    KTH Royal Institute of Technology, Sweden.
    Superamphiphobic plastrons on wood and their effects on liquid repellence2020In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 195, article id 108974Article in journal (Refereed)
    Abstract [en]

    The increasing utilization of wood-based products raises new demands for improved durability, for example an enhanced liquid repellence. Superhydrophobic or superamphiphobic surfaces have been widely fabricated. Less attention has been paid to such modifications on wood and the changes of its hygroscopic or solvoscopic properties. In this work, wood veneers were surface modified by hydrophobized silicone nanofilaments. Results revealed that the surface-modified wood showed a superamphiphobic behavior, i.e. it repelled water, ethylene glycol and hexadecane with contact angles greater than 150° and roll-off angles of less than 10°. Most importantly, a plastron effect was observed when the surface-modified wood was submerged in water, ethylene glycol or hexadecane, which reduced the liquid sorption rate and extent to various degrees. By comparing the measured permeabilities and the estimated diffusive mass flux and supported by Hansen solubility parameters and the degrees of swelling, it is concluded that diffusion is the major cause for the liquid uptake in the surface-modified wood. Moreover, the interaction between the liquid and the modified layer (the solubility of the liquid in the modified layer) also needs to be considered, especially in hexadecane. © 2020 The Authors

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