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  • Walter de Gruyter GmbH  (6)
  • 1
    Online Resource
    Online Resource
    Fire retardancy of graphene oxide/wood composite (GOW) prepared by a vacuum-pulse dipping technique
    Walter de Gruyter GmbH ; 2018
    In:  Holzforschung Vol. 72, No. 5 ( 2018-04-25), p. 375-378
    Details
    In: Holzforschung, Walter de Gruyter GmbH, Vol. 72, No. 5 ( 2018-04-25), p. 375-378
    Abstract: Graphene oxide/wood (GOW) composite was fabricated by a vacuum-pulse dipping technique, and the resulting composites were characterized by scanning electron microscope (SEM), Raman spectroscopy and thermogravimetric analysis (TGA). As demonstrated, the wood matrix became filled by the dense multilayer graphene oxide (GO) membrane structure, which was formed by the layer-by-layer self-assembly of GO nano-sheets. X-ray diffraction (XRD) revealed that the amorphous GO decreased the composite’s relative degree of crystallinity. Additionally, the filled GO generated improvement in the thermal stability of GOW composites in comparison with that of the natural wood (NW).
    Type of Medium: Online Resource
    ISSN: 1437-434X , 0018-3830
    URL: Article
    DOI: 10.1515/hf-2017-0111
    Language: Unknown
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 1466072-6
    SSG: 23
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Improved wood properties via two-step grafting with itaconic acid (IA) and nano-SiO 2
    Walter de Gruyter GmbH ; 2018
    In:  Holzforschung Vol. 72, No. 6 ( 2018-6-27), p. 499-506
    Details
    In: Holzforschung, Walter de Gruyter GmbH, Vol. 72, No. 6 ( 2018-6-27), p. 499-506
    Abstract: Itaconic acid (IA) with its trifunctional structure was first introduced into the wood cell lumen and cell wall, which functions as a grafting anchor for fixing various polymers via strong chemical bonds. Then nano-SiO 2 was grafted to the IA-modified wood. Field-emission scanning electron microscope revealed that the grafting experiment was successful and that the modified cell wall thickness increased by 65%. The incorporated hydrophobic nano-SiO 2 substructure reduced the wood’s hygroscopicity and improved its dimensional stability. The thermal stability of the new composite was also excellent. The presented approach is simple and efficient and the probability is high that it can be up-scaled to a level of a large-scale engineering material.
    Type of Medium: Online Resource
    ISSN: 1437-434X , 0018-3830
    URL: Article
    DOI: 10.1515/hf-2017-0117
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 1466072-6
    SSG: 23
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Negative oxygen ion (NOI) production by enhanced photocatalytic TiO 2 /GO composites anchored on wooden substrates
    Walter de Gruyter GmbH ; 2019
    In:  Holzforschung Vol. 73, No. 4 ( 2019-04-24), p. 415-422
    Details
    In: Holzforschung, Walter de Gruyter GmbH, Vol. 73, No. 4 ( 2019-04-24), p. 415-422
    Abstract: Titanium dioxide (TiO 2 )/graphene oxide (GO)-treated wood was fabricated through a one-step hydrothermal-vacuum dipping technique, in which silica sol serves as a dispersant and linker owing to its good stability and high surface area, while the visible light activates TiO 2 /GO and negative oxygen ions (NOI) arise. This approach exhibits a super dye adsorption capacity and enhanced photocatalytic efficiency. In focus was the effect of the three-dimensional (3D) GO dopant on the NOI production, which was very high in this system. Namely, the concentration of NOI is up to 1710 ions cm −3 after 60 min visible light irradiation. Moreover, recycling experiments show that the properties of a TiO 2 /GO-wood system are stable. The TiO 2 /GO-treated wood is a healthy, environmentally friendly material which is promising for indoor decoration.
    Type of Medium: Online Resource
    ISSN: 1437-434X , 0018-3830
    URL: Article
    DOI: 10.1515/hf-2018-0107
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 1466072-6
    SSG: 23
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    Online Resource
  • 4
    Online Resource
    Online Resource
    An effective technique for constructing wood composite with superior dimensional stability
    Walter de Gruyter GmbH ; 2020
    In:  Holzforschung Vol. 74, No. 5 ( 2020-05-26), p. 435-443
    Details
    In: Holzforschung, Walter de Gruyter GmbH, Vol. 74, No. 5 ( 2020-05-26), p. 435-443
    Abstract: Fast-growing wood is an abundant and low-cost material and is widely used for structural building and furniture construction. However, inferior mechanical properties and dimensional instability limit its application in advanced engineering structures. Herein, we developed a simple, effective and “green” method to transform bulk poplar into a high-performance wood composite. The wood composite was prepared by the impregnation of the itaconic acid (IA) solution acting as a grafting anchor into the wood matrix, followed by in situ polymerization of styrene upon heating to form a hydrophobic polymer within the wood scaffold. Scanning electron microscope (SEM) analysis revealed that hydrophobic polystyrene (PS) was deposited in wood cell walls and lumens, leading to a reduced water uptake and remarkably enhanced dimensional stability, as well as generally improved mechanical properties. In addition, the PS generated improvement in the thermal stability of the wood composite in comparison with that of natural wood (W).
    Type of Medium: Online Resource
    ISSN: 1437-434X , 0018-3830
    URL: Article
    DOI: 10.1515/hf-2019-0176
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 1466072-6
    SSG: 23
    Location Call Number Limitation Availability
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Rotation and deformation of human red blood cells with light from tapered fiber probes
    Walter de Gruyter GmbH ; 2017
    In:  Nanophotonics Vol. 6, No. 1 ( 2017-1-6), p. 309-316
    Details
    In: Nanophotonics, Walter de Gruyter GmbH, Vol. 6, No. 1 ( 2017-1-6), p. 309-316
    Abstract: Dynamic rotation and deformation of human red blood cells (RBCs) are extremely important to investigate the survival and mechanical features of cells, which will be of great physiological and pathological significance. Here, we report an optical approach that is capable of both rotating and deforming RBCs with light from two tapered fiber probes (TFPs). With laser beams at the wavelength of 980 nm injected into the TFPs, a single RBC was rotated around different axes while single or multiple RBCs were stretched by adjusting the points of action and magnitude of the optical forces from the TFPs. The biological safety of the approach was also discussed by taking the laser power required into account.
    Type of Medium: Online Resource
    ISSN: 2192-8614 , 2192-8606
    URL: Article
    DOI: 10.1515/nanoph-2016-0115
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2674162-3
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    Online Resource
  • 6
    Online Resource
    Online Resource
    Tribological performance of nano-diamond composites-dispersed lubricants on commercial cylinder liner mating with CrN piston ring
    Walter de Gruyter GmbH ; 2020
    In:  Nanotechnology Reviews Vol. 9, No. 1 ( 2020-06-23), p. 455-464
    Details
    In: Nanotechnology Reviews, Walter de Gruyter GmbH, Vol. 9, No. 1 ( 2020-06-23), p. 455-464
    Abstract: This work investigated the effect of nanodiamond (ND) additives on the tribological properties of CrN-coated piston ring mating with the chromium-plated and BP alloy iron cylinder liners, which is one of the key friction pairs in the internal combustion engines. To enhance the dispersion of the NDs in the base oil, the surface of ND particles was modified with polyaniline via in situ polymerization. The friction and wear as well as the scuffing characteristics of the friction pair lubricated with different contents of ND composite-added base oil were evaluated by using the reciprocating tribotests, which are close to the actual conditions. The wear surface morphologies and elements distribution were analyzed to explore the wear behaviors and the associated mechanisms of friction pairs under the lubrication incorporated with the ND composites. The results show that the ND additive is beneficial for the pair of Cr liner and CrN-coated piston ring in the friction and wear as well as scuffing properties, and the best concentration of ND additive is expected to be around 1 wt%. But for the BP liner, the developed nanocomposite has a negative impact. The friction force and the wear loss of the pair lubricated by the ND composite-added oil are even worse than that tested with the base lubricating oil.
    Type of Medium: Online Resource
    ISSN: 2191-9097
    URL: Article
    DOI: 10.1515/ntrev-2020-0035
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2646548-6
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