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49 results on '"Wu, Zhenzeng"'

11. A novel particleboard using unsaturated polyester resin as a formaldehyde-free adhesive

Author

Li, Ran, Lan, Congrong, Wu, Zhenzeng, Huang, Tengan, Chen, Xiaobin, Liao, Yuehua, Ye, Longfeng, Lin, Xiuduan, Yang, Yuming, Zheng, Yanmei, Xie, Yongqun, and Zhuang, Qingping

Subjects
Polyester adhesives -- Analysis -- Mechanical properties, Business, Construction and materials industries
Abstract

ABSTRACT Wood-based artificial panels are still widely used even though they release harmful formaldehyde. In order to protect humans from exposure to formaldehyde, we successfully produced particleboards via surface treatment [...]

Published
2017
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26. A novel particleboard using unsaturated polyester resin as a formaldehyde-free adhesive

Author

Yang Yuming, Wu Zhenzeng, Xiaobin Chen, Yanmei Zheng, Congrong Lan, Xie Yongqun, Tengan Huang, Liao Yuehua, Lin Xiuduan, Longfeng Ye, Li Ran, and Zhuang Qingping

Subjects
Aqueous solution, Absorption of water, Materials science, 0211 other engineering and technologies, Formaldehyde, Interfacial adhesion, Unsaturated polyester, 02 engineering and technology, Building and Construction, Dynamic mechanical analysis, 021001 nanoscience & nanotechnology, Contact angle, chemistry.chemical_compound, chemistry, 021105 building & construction, General Materials Science, Adhesive, Composite material, 0210 nano-technology, Civil and Structural Engineering
Abstract

Wood-based artificial panels are still widely used even though they release harmful formaldehyde. In order to protect humans from exposure to formaldehyde, we successfully produced particleboards via surface treatment of wood fibers and using unsaturated polyester resin (UP) as formaldehyde-free adhesive. A phenolic formaldehyde (PF) aqueous solution was utilized to treat the wood particles to make them more compatible. The mechanical properties were investigated to see if the particleboards comply with national standards and M-1 grade (ANSI A208.1-1999). A water absorption test determined the dimensional stability of the FF particleboards. The PF-treated FF particleboards performed several times better than the untreated FF particleboard. Furthermore, the effect of the PF treatment on the interfacial adhesion of wood particles and UP was investigated using SEM, DMTA, and contact angle measurements. The results confirm that PF treatment improves the interfacial adhesion of UP and wood particles. Formaldehyde emission tests found no formaldehyde in the new particleboards. Our proposed low-cost fiber-treatment and efficient board production method may be suited for the commercial production of artificial panels.

Published
2017

29. Machinability investigation in turning of high density fiberboard

Author

Zhu, Zhaolong, Buck, Dietrich, Guo, Xiaolei, Ekevad, Mats, Pingxiang, Cao, Wu, Zhenzeng, Zhu, Zhaolong, Buck, Dietrich, Guo, Xiaolei, Ekevad, Mats, Pingxiang, Cao, and Wu, Zhenzeng

Abstract

A series of experiments were conducted to assess the machinability of high density fiberboardusing cemented carbide cutting tools. The objective of this work was to investigate theinfluence of two cutting parameters, spindle speed and feed per turn, on cutting forces, chipformation and cutting quality. The results are as follows: cutting forces and chip-breakinglength decrease with increasing spindle speed and decreasing feed per turn. In contrast,surface roughness increases with decrease of spindle speed and increase in feed perturn. Chips were divided into four categories based on their shape: dust, particle, splinter,and semicontinuous chips. Chip-breaking length had a similar tendency to the varianceof cutting forces with respect to average roughness and mean peak-to-valley height: anincrease in the variance of cutting forces resulted in increased average roughness andmean peak-to-valley height. Thus, high cutting speed and low feed rate are parameters suitablefor high-quality HDF processing and will improve not only machining quality, but productionefficiency., Validerad;2018;Nivå 2;2018-09-18 (svasva)

Published
2018
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34. Effect of Boron-Zinc-Aluminum-Silicium Compounds on the Fire Performance of Ultra-Low Density Fiberboards

Author

Wu, Zhenzeng, Chen, Tingjie, Niu, Min, Cai, Lili, Xie, Yongqun, and Wang, Alice

Subjects
Optimization, 0106 biological sciences, Environmental Engineering, Materials science, lcsh:Biotechnology, chemistry.chemical_element, Bioengineering, Sodium silicate, 02 engineering and technology, Zinc, Fire performance, 01 natural sciences, Limiting oxygen index, chemistry.chemical_compound, lcsh:TP248.13-248.65, 010608 biotechnology, Cone calorimeter, Sulfate, Composite material, Boron, Waste Management and Disposal, Annan maskinteknik, Borax, B-Zn-Si-Al compounds, 021001 nanoscience & nanotechnology, chemistry, Ultra-low density, Other Mechanical Engineering, 0210 nano-technology, Nuclear chemistry, Fire retardant
Abstract

B-Zn-Si-Al compounds are modified Si-Al compounds made of sodium silicate, zinc sulfate, borax, and aluminum sulfate. They act as a fire retardant during the preparation of ultra-low density fiberboards (ULDFs). An orthogonal experiment was used to optimize the contents of the four compounds according to the limiting oxygen index. Fourier transform infrared spectroscopy was employed to preliminarily analyze the chemical structure of the compounds. Additionally, a cone calorimeter was used to assess the fire performance of the ULDFs. The results suggested that the optimized solution was made of 27.0 mL of sodium silicate solution, 27.0 mL of aluminum sulfate solution, 3.0 g of zinc sulfate, and 6.5 g of borax, resulting in an oxygen index of 29.5%. The bond Al-O-B was detected at 1397 and 796 cm-1. The Si-O-Zn bonds were detected at 867 cm-1. The heat release rate, total heat release, and total smoke release decreased and the mass residual ratio increased in the sample using the optimal conditions from the orthogonal array design. It was concluded that B-Zn- Si-Al compounds effectively protect fibers from fire. Validerad; 2016; Nivå 2; 20160331 (aliwan)

Published
2016

36. Mesoporous aluminosilicate improves mildew resistance of bamboo scrimber with Cu[sbnd]B[sbnd]P anti-mildew agents.

Author

Wu, Zhenzeng, Huang, Daobang, Wei, Wei, Wang, Wei, Wang, Xiaodong(Alice), Wei, Qihua, Niu, Min, Lin, Ming, Rao, Jiuping, and Xie, Yongqun

Subjects
*ALUMINUM silicates, *MESOPOROUS materials, *MILDEW, *BAMBOO, *COPPER compounds, *PLANT fibers
Abstract

Abstract The mesoporous aluminosilicate synergy with Cu B P anti-mildew agent was studied with the objective of improving the mildew resistance of bamboo scrimber. The Si Al inorganic film with enormous pore volume, was added to cover on the bamboo fiber's surface by a simple and sustainable dip-coating process. The results showed that the process decreased the leachability of the anti-mildew agents, which would improve efficiency of preservative agents and extend service life for the bamboo-based products. The average mold control effectiveness of three types of mold and stain fungi of the final product was greatly improved with 91.75% in optimized samples. In addition, the outdoor test indicated that the anti-mildew agents worked satisfactorily and no evidence of microbes infection and stain was found in bamboo scrimbers prepared by optimum processing parameters. Graphical abstract Image 1 Highlights • Fabricating mesoporous Si-Al inorganic film using eco-friendly raw materials. • Cleaner and facile process with sustainable and recyclable Cu-B-P treating liquid. • Efficient in leaching resistance and excellent anti-mildew performance in practice. • Prolong the service life and add value to bamboo product. [ABSTRACT FROM AUTHOR]

Published
2019
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37. Evaluating the Effectiveness of Complex Fire-Retardants on the Fire Properties of Ultra-low Density Fiberboard (ULDF)

Author

Chen, Tingjie, Liu, Jinghong, Wu, Zhenzeng, Wang, Wei, Niu, Min, Wang, Alice, Xie, Yongqun, Chen, Tingjie, Liu, Jinghong, Wu, Zhenzeng, Wang, Wei, Niu, Min, Wang, Alice, and Xie, Yongqun

Abstract

The preparation conditions of complex fire-retardant (FR) agents containing boron compounds (BF, X1), nitrogen-phosphorus compounds (NPF, X2), silicon compounds (SF, X3), and halogen compounds (HF, X4) for ultra-low density fiberboard (ULDF) were optimized using a response surface methodology. The effects and interactions of X1, X2, X3, and X4 on the fire properties of ULDF were investigated. An optimum char yield of 61.4% was obtained when the complex fire-retardant agents contained 33.9% boron, 27.2% nitrogen-phosphorus, 15.0% silicon, and 28.6% halogen. Compared with control fiberboard (CF), the heat release rate (HRR) profiles of all fiberboards with FRs were reduced. The peak HRR reduction in BF and NPF was more pronounced than for SF and HF at this stage. And the mixed fiberboard (MF) had the lowest pkHRR of 75.02 kW m−2. In total heat release (THR) profiles, all fiberboards with FRs were lower than the CF. Unlike the HRR profiles, HF had the lowest THR profile of 15.33 MJ/m−2. Additionally, Si compounds showed greater effectiveness in preventing ULDF mass loss than BF, NPF, and HF. MF showed the highest residual mass (40.94%). Furthermore, the synergistic effect between four FR agents showed more significant results in ULDFs., Validerad; 2016; Nivå 2; 20151022 (aliwan)

Published
2016
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38. Effect of PVDC on the Fire Performance of Ultra-Low Density Fiberboards (ULDFs)

Author

Wu, Zhenzeng, Chen, Tingjie, Huang, Daobang, Wang, Wei, Xie, Yongqun, Wan, Hui, Wang, Xiaodong (Alice), Wu, Zhenzeng, Chen, Tingjie, Huang, Daobang, Wang, Wei, Xie, Yongqun, Wan, Hui, and Wang, Xiaodong (Alice)

Abstract

Poly vinylidene chloride-vinyl chloride emulsions (PVDC) were added as a substitute for chlorinated paraffin (CP) in the preparation of ultra-low density fiberboards (ULDFs). The micromorphology and fire performance of ULDFs were investigated using a scanning electron microscope, limiting oxygen index instrument, and cone calorimeter. The results showed that PVDC specimens were coated with a regularly smooth film, while the distribution of CP inside CP specimens was uneven. The limiting oxygen index increased with the dosage of PVDC, then reached a plateau at 50 mL and 28%, slightly higher than CP specimens (27.3%). The peak of heat release rate, mean heat release rate, mean CO, and total smoke release of PVDC specimens was reduced 43.3%, 13.5%, 38.5%, and 51.5% lower than respective CP specimens, and with nearly the same total heat release (only 0.04 MJ/m2 higher). Thus, PVDC exhibited excellent heat-reducing and smoke-suppressing properties and could replace CP in ULDFs., Validerad; 2016; Nivå 2; 2016-12-01 (inah)

Published
2016
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