Composite coatings of inorganic nanomaterials with polyelectrolytes are promising materials for wood modification. Endowing flame retardancy behavior can not only broaden the range applications wood, but also improve safety products. In this work, chitosan/sodium phytate/TiO2-ZnO nanoparticle (CH/SP/nano-TiO2-ZnO) composite were coated on surface through layer-by-layer self-assembly. The morphology and chemical composition modified samples analyzed using scanning electron microscopy energy...

Abstract Natural wood surface is hydrophilic and can easily absorb moisture. Inorganic nanometer-scale metal oxides be controlled fabricated on to serve as a protective coating. In the present study, superhydrophobic consisting of zinc oxide (ZnO) nanorod array was successfully attached via cosolvent hydrothermal method at low temperature. By means X-ray diffraction pattern Fourier transform infrared spectroscopy, presence hexagonal wurtzite phase ZnO detected characterized. Field-emission...

The development of biomaterials-based adhesives is one the main research directions for wood-based material industry. In previous research, tannin and sucrose were used as adhesive to manufacture particleboard. However, reaction conditions need be optimized. this study, sulfuric acid was added tannin⁻sucrose a catalyst improve curing process. Thermal analysis, insoluble mass proportion, FT-IR, solid state 13C NMR investigate effects on behavior sucrose. analysis showed weight loss endotherm...

Abstract A transparent and protective multilayer coating composed of poly(allylamine hydrochloride) (PAH), poly(styrene sulfonic acid) sodium salt (PSS), nano-TiO 2 films was fabricated on wood surfaces by layer-by-layer assembly method. The formed through pre-immobilization cationic PAH layer substrate, followed alternate soaking cycles in pH-controlled anionic PSS solution TiO colloidal solution. structure properties the assembled were characterized scanning electron microscopy (SEM),...

The photochromic properties are highly desirable for advanced wood applications, but they have not been extensively studied. To incorporate capabilities into materials, composite coatings were developed on the surface using an electric field-assisted layer-by-layer (LBL) self-assembly technique. consist of cationic chitosan and anionic tungsten trioxide (WO3) nanoparticles. By applying a direct current voltage during deposition process, well-organized distribution WO3 nanoparticles was...

Fire-retardant chitosan/sodium phytate/MgO nanoparticle (CH/SP/nano-MgO) coatings were loaded on a wood substrate via electrostatic layer-by-layer self-assembly and characterized by scanning electron microscopy energy-dispersive spectrometry. The flammability thermal degradation of the original samples treated with chitosan, phytate, nanoparticles studied limiting oxygen index (LOI), exposure combustion experiments thermogravimetric analysis (TGA), respectively. CH/SP/nano-MgO coating served...

Abstract In special applications, such as hospitals and rehabilitation centers, hygienic wood surface with antimicrobial performance is recommendable. the present study, property of was increased by grafting 2-(dimethylamino)ethyl methacrylate (DMAEMA). The reaction proceeds via radical polymerization, analysis Fourier transform infrared spectroscopy, X-ray photoelectron scanning electron microscopy, thermogravimetric confirmed successful DMAEMA to wood. tertiary amino groups immobilized...

Magnetic wood would have potential uses in electromagnetic shielding and wave absorption. In this paper, magnetic coatings on a surface were synthesized using layer-by-layer self-assembly method. As the cationic polyelectrolyte carrier, natural macromolecular chitosan was pre-immobilized first, followed by alternate adsorption of anionic sodium phytate positively-charged Fe3O4 nanoparticles. The concentration pH-controlled solution, nanoparticle suspension, soaking time, number alternating...

Wood has the characteristics of shrinkage and swelling, flammability, insulation, which can lead to poor user experience accidents during its application in wood structure buildings products. In this study, multifunctional chitosan/sodium phytate/TiO2-CuO nanoparticle composite coatings were sprayed on a surface through spray-assisted layer-by-layer (SP-LBL) self-assembly. By designing different spraying distances other process parameters combined with resistance test, thermogravimetric...

Abstract Aluminum hydroxide [Al(OH) 3 ] film on wood substrate has been synthesized by means of the hydrothermal (HT) method for improvement wood’s mechanical properties and resistance to combustion. The HT temperature was set 100°C 120°C, reaction time varied from 4 h 10 h. X-ray diffraction (XRD) photoelectron spectrometry (XPS) results show that thin grown surface amorphous Al(OH) relative crystallinity treated woods slightly improved. SEM observation revealed is composed regular...

Wooden take-off board is easy to crack, deform, discolor, and decay when it used outdoors, which not only increases maintenance costs but also reduces its service life. Multifunctional coatings with UV-resistant, water-repellent, flame-retardant properties were successfully obtained on the surface of a wooden substrate by spray-assisted layer-by-layer self-assembly. The consisted positively-charged chitosan, Al (OH)3, negatively-charged sodium phytate through electrostatic adsorption several...

Abstract ZnO nanorod array coatings were successfully synthesized on wood surfaces using a conventional hydrothermal (CHT) and microwave-assisted (MWHT) method. The reaction time of the MWHT method at high temperature was only 1/12th that CHT MWHT-ZnO nanorods exhibited better crystallinity than those produced by had wurtzite crystal structure oriented along c -axis. with their higher (002)/(101) ratio more conducive improved orientation degree nanorods. Field emission scanning electron...

In this study, environmentally friendly and low-cost biomass materials were selected as wood flame retardants. Three polyelectrolyte flame-retardant coatings made from chitosan (CS), tea polyphenols (TP), soybean isolate protein (SPI), banana peel powder (BBP) constructed on surfaces by layer-by-layer (LBL) self-assembly. The results of SEM-EDS FT-IR analyses confirmed the successful deposition CS-TP, CS-SPI, CS-BPP surface, content N element increased. TG showed that initial decomposition...

Polyester fibers tend to generate static electricity during the weaving and application processes, posing a threat their production. Enhancing water absorbency electrical conductivity of polyester themselves is an effective approach improving antistatic properties. In this study, multifunctional chitosan (CS), sodium phytate (SP), Cu2+ were loaded on through layer-by-layer (LBL) self-assembly. The absorption capability modified was investigated by designing different process parameters...

Carbon dioxide (CO2) is generally unavoidable during the production of fuel gases such as hydrogen (H2) from steam reformation and syngas composed carbon monoxide (CO) (H2). Efficient separation CO2 these highly important to improve energetic utilization efficiency prevent poisoning specific applications. Metal–organic frameworks (MOFs), featuring ordered porous frameworks, high surface areas tunable pore structures, are emerging materials utilized solid adsorbents for efficient capture...

Abstract In this study, low-temperature alkali-modified fly ash and polymeric aluminum chloride(PAC) for the removal of total phosphorus, COD ammonia nitrogen, from wastewater was systematacially investigated. The rate nitrogen 81.10%, rates phosphorus were 90.21% 55.48%, respectively., when a dosage 5g/L, amount PAC 50mg/L, mixing time 39min. comparison with raw ash, is 80.16% higher than that original 35.48% higher. Fly improved surface can be used as an alternative adsorbent to flocculate...

Objective To investigate 0-24 months infantile breastfeeding and service requirement of child care clinic in Tianjin Binhai district. Methods A total 350 cases from June 1,2014 to 1, 2016 were adopted by questionnaire method about requirement. Results In the survey, all them breastfeeding, 0-6 rate was 84.4% (295/350). They divided into three groups: urban, rural external population, main population urban(64.0%, 224/350). The closely relate education mother, graduate above...