Dehua TB New Decoration Material Co.

Huzhou, China

Dehua TB New Decoration Material Co.

Huzhou, China
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Gan W.,Northeast Forestry University | Gao L.,Northeast Forestry University | Zhan X.,Dehua TB New Decoration Material Co. | Li J.,Northeast Forestry University
RSC Advances | Year: 2015

Magnetic wood would have potential uses in electromagnetic shielding, indoor electromagnetic wave absorption and heavy metal adsorption. In this study, magnetic wood composites with improved thermal stability and mechanical properties as well as UV resistance were prepared by modification with magnetic CoFe2O4 and hydroxyapatite (HAP) via a hydrothermal process. The functional groups and morphology of the modified wood were examined by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM) with energy-dispersive X-ray analysis (EDXA). The results indicated that the magnetic CoFe2O4 nanoparticles precipitated on the wood substrate during the alkali treatment, and then the hydroxyapatite was grown on the wood surface via the electrostatic interactions between the calcium cations and the negatively charged OH- anions. Moreover, the magnetic, thermal and mechanical performances and the UV-resistance of the CoFe2O4/HAP-modified wood composites were also evaluated. This journal is © The Royal Society of Chemistry.


Gan W.,Northeast Forestry University | Gao L.,Northeast Forestry University | Zhang W.,Northeast Forestry University | Li J.,Northeast Forestry University | Zhan X.,Dehua TB New Decoration Material Co.
Ceramics International | Year: 2016

A superhydrophobic wood surface with microwave absorption property was prepared based on the formation of CoFe2O4 nanoparticles and subsequent hydrophobization using fluorinated alkylsilane (FAS). Meanwhile, sticky epoxy resin was worked as a caking agent by adhering abundant of CoFe2O4 nanoparticles to wood surface. The as-prepared superhydrophobic coatings on wood maintain stable superhydrophobicity after suffering a significant abrasion. Moreover, the complex permeability and permittivity of the coated wood composites were measured in the frequency range of 2-18GHz by vector network analysis. The microwave absorption properties were elucidated by the traditional coaxial line method. The results show that the as-prepared wood composites have excellent microwave absorption properties at the frequency of 16GHz, and the minimum reflection loss can reach -12.3dB. The approach presented may provide further routes for designing outdoor wood wave absorbers with a specified absorption frequency. © 2016.


Gao L.,Northeast Forestry University | Gan W.,Northeast Forestry University | Xiao S.,Northeast Forestry University | Zhan X.,Dehua TB New Decoration Material Co. | Li J.,Northeast Forestry University
Ceramics International | Year: 2016

Ag-TiO2 heterostructures with Ag nanocrystals and TiO2 particles well-grown on wood substrate was achieved by a two-step protocol combining hydrothermal synthesis and silver mirror reaction. The investigation of the photocatalytic ability demonstrated that the wood coated with Ag-TiO2 composite film possess excellent photocatalytic activity, superior to the wood coated with pure TiO2 particles, for the degradation of phenol under visible-light illumination. The Ag/TiO2-coated wood was further modified by (heptadecafluoro-1,1,2,2-tetradecyl)trimethoxysilane, which acted as a crucial role in improving the repellency toward water and imparting self-cleaning property to the wood products. The modified wood has potent antibacterial activity toward both Gram-positive and Gram-negative bacterium. The multifunctional film coated on wood surface exhibits a good photodegradation of organic pollutant and a robust superhydrophobicity, leading to an important application in self-cleaning. © 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.


Gan W.,Northeast Forestry University | Gao L.,Northeast Forestry University | Zhang W.,Northeast Forestry University | Li J.,Northeast Forestry University | And 2 more authors.
Materials and Design | Year: 2016

In this study, the poplar sawdust was used as a recyclable, low cost, environmentally friend and highly selective oil absorbent material. The sawdust with high hydrophobicity, superoleophilicity and magnetic property was obtained by precipitating CoFe2O4 on sawdust surface and chemically modifying the low surface energy polysiloxane layers. These composites were able to absorb lubrication oil up to 11.5 times of the sawdust weight while completely repelling water. In addition, the oil-absorption composites were able to collect oils conveniently from water surface with the help of an external magnet due to its exceptional magnetic property. Furthermore, the sawdust could be cleared up and re-used for water-oil separation at least 10 times. This work provides a potential platform for developing a water-protection strategy using natural waste resources. © 2016 Elsevier Ltd.


Gan W.,Northeast Forestry University | Gao L.,Northeast Forestry University | Zhan X.,Dehua TB New Decoration Material Co. | Li J.,Northeast Forestry University
RSC Advances | Year: 2016

Thiol-functionalized magnetic sawdust, synthesized by precipitating γ-Fe2O3 nanoparticles on the sawdust surface and then modifying the 3-mercaptopropyltrimethoxysilane layers, has been investigated as an environmentally friendly and recyclable adsorbent for heavy metal ions. The process of modifying was confirmed by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction. Compared with the nonmagnetic sawdust, the thiol-functionalized magnetic sawdust possesses high saturation magnetization (7.28 emu g-1), and can be easier and faster to separate from water under an external magnetic field. The adsorption equilibrium was reached within 20 min and the adsorption kinetics were elucidated by a pseudo-second-order model. The adsorption isotherms of Cu2+, Pb2+ and Cd2+ fitted well with the Langmuir model, exhibiting an adsorption capacity of 5.49 mg g-1, 12.5 mg g-1 and 3.80 mg g-1, respectively. Competitive adsorption among the three metal ions showed a preferential adsorption of Pb2+ > Cu2+ > Cd2+. In addition, the magnetic sawdust adsorbent exhibited excellent acid-alkali stability and the metal-loaded adsorbent was able to regenerate in an acid solution without significant adsorption capacity loss. © The Royal Society of Chemistry 2016.


Gao L.,Northeast Forestry University | Lu Y.,Chinese Academy of Forestry | Zhan X.,Dehua TB New Decoration Material Co. | Li J.,Northeast Forestry University | Sun Q.,Zhejiang Agriculture And forestry University
Surface and Coatings Technology | Year: 2015

A two-step method containing low-temperature hydrothermal synthesis with TiO2 precursor solution and subsequent modification with fluoroalkyl silane on wooden substrates was investigated. Scanning electron microscopy (Scanning electron microscope) images showed that the TiO2-treated wood substrate was covered with uniform TiO2 particles, which generated a roughness on the wood surface favoring the formation of the superhydrophobic surface, and the decoration of (heptadecafluoro-1,1,2,2-tetradecyl)trimethoxysilane on TiO2-based wood surface acted as a crucial role in improving the repellency toward water. The superhydrophobic wood surface with the water contact angle (WCA) of 152.9°, maintained superhydrophobic property with the WCA larger than 150° after immerse in 0.1M hydrochloric acid solution for one week, irradiating under UV light for 24h, or boiling at 150°C for 10h. The prepared wood surface showed multi-functions including super repellency toward water, anti-acid, and high-temperature-humidity-resistant. On the basis of the results, the functional coating on the wood surface provided an enlarged field of the wood works, such as historic structure protection. © 2014 Elsevier B.V.


Gao L.,Northeast Forestry University | Zhan X.,Dehua TB New Decoration Material Co. | Lu Y.,Chinese Academy of Forestry | Li J.,Northeast Forestry University | Sun Q.,Northeast Forestry University
Materials Letters | Year: 2015

TiO2 thin films with different wettability were fabricated on the wood surfaces by a simple low-temperature hydrothermal method with the precursor solution pH adjusted by hydrochloric acid/sodium hydroxide. The morphologies of TiO2 films have been changed from sphere species to filmy ones by adjusting pH of precursor solution. The TiO2 films synthesized at the precursor solution pH of 1-10 were mainly primary existed in anatase phase without other structure, and the TiO2-treated wood surfaces presented different wettability with the water contact angles ranged from 9.6° to 132.7°, when the precursor solution pH were controlled to the range of 1-14. Such a wood surface with the desirable wettability shows great potential, as it may be selectively used in the various environments with different humidity. © 2014 Elsevier B.V. All rights reserved.


Gan W.,Northeast Forestry University | Gao L.,Northeast Forestry University | Zhan X.,Dehua TB New Decoration Material Co. | Li J.,Northeast Forestry University
Wood Science and Technology | Year: 2016

In this study, amino-functionalized magnetic γ-Fe2O3/sawdust composites (MSC-NH2) were investigated as biological absorption materials for removing Cu2+ ions from aqueous solution. These composites were fabricated by precipitated γ-Fe2O3 nanoparticles on sawdust substrate and then functionalized with 1,6-hexanediamine. Characterization of MSC-NH2 was performed by means of SEM, TEM, XRD, FTIR, BET, MPMS and XPS analysis to discuss the uptake mechanism. As a result, the amino groups are grafted upon the sawdust surfaces. The MSC-NH2 could be effectively used to remove Cu2+ from aqueous solution and be separated conveniently from the solution with the help of an external magnet. Batch experiments show that the adsorption equilibrium is achieved in 150 min, and the adsorption capacity is 7.55 mg/g at pH 6 and room temperature. The isotherm analysis indicates that the sorption data could be represented by Langmuir isotherm models. The kinetics is evaluated utilizing the Lagergren pseudo-first-order, pseudo-second-order, Elovich and intra-particle diffusion models. Thermodynamic parameters reveal the spontaneous, endothermic and chemical nature of adsorption. © 2016 Springer-Verlag Berlin Heidelberg


PubMed | Dehua TB New Decoration Material Co. and Northeast Forestry University
Type: | Journal: Scientific reports | Year: 2016

According to statistics, early in the 20th century, the proportion of positive and negative air ions on the earth is 1 : 1.2. However, after more than one century, the equilibrium state of the proportion had an obvious change, which the proportion of positive and negative air ions became 1.2 : 1, leading to a surrounding of positive air ions in human living environment. Therefore, it is urgent to adopt effective methods to improve the proportion of negative oxygen ions, which are known as air vitamin. In this study, negative oxygen ions production by the TiO2/Cu2O-treated wood under UV irradiation was first reported. Anatase TiO2 particles with Cu2O particles were doped on wooden substrates through a two-step method and further modification is employed to create remarkable superamphiphobic surface. The effect of Cu2O particles dopant on the negative oxygen ions production of the TiO2-treated wood was investigated. The results showed that the production of negative oxygen ions was drastically improved by doping with Cu2O particles under UV irradiation. The wood modified with TiO2/Cu2O composite film after hydrophobization is imparted with superamphiphobicity, antibacterial actions against Escherichia coli, and negative oxygen ions production under UV irradiation.


Trademark
DeHua TB New Decoration Material Co. | Date: 2011-02-01

Finished timber; wood floor boards; plaster boards; wooden railings; non-metal windows; non-metal doors; stair treads not of metal; non-metal floors; non-metal door frames; non-metal doors and windows.

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