研究目的
To prepare anti-ultraviolet and infrared heat shielding transparent wood (TW) by incorporating modified antimony-doped tin oxide (ATO) nanoparticles into PMMA-infiltrated delignified wood for energy-efficient building applications.
研究成果
The ATO/TW composites exhibit enhanced mechanical properties, excellent infrared heat shielding, and UV shielding, making them promising for energy-saving building materials, though transparency needs optimization.
研究不足
The incorporation of ATO reduced transparency, and further improvements in transparence and aging resistance are needed for practical applications.
1:Experimental Design and Method Selection:
The study involved delignification of wood substrate using NaClO2, surface modification of ATO nanoparticles with KH570 silane coupling agent, dispersion of modified ATO in MMA, pre-polymerization, infiltration into delignified wood, and polymerization to form ATO/TW composites. Methods included SEM, TEM, FT-IR, UV-Vis-NIR spectrophotometry, thermal conductivity measurement, mechanical testing, infrared heat shielding simulation, and UV shielding tests.
2:Sample Selection and Data Sources:
Poplar wood (P. adenopoda Maxim) samples of dimensions 25 mm × 25 mm × 1 mm and 50 mm × 50 mm × 1 mm were used. Chemicals were analytical grade from specified suppliers.
3:List of Experimental Equipment and Materials:
Equipment included SEM (JSM-7500F), TEM (Tecnai G20, JEM 2100), UV-Vis spectrophotometer (Cary100), UV-Vis-NIR spectrophotometer (Lambda 950), FT-IR spectrometer (Kingslh, ZN-04), laser flash thermal analyzer (LAF-457), electromechanical universal testing machine (CMT5504, MTS), infrared lamp (PHILIPS, R125), QUV accelerated weathering tester, portable spectrocolorimeter (CM-2300D, MINOLTA). Materials included sodium chlorite, acetic acid, sodium acetate, ethanol, acetone, MMA, AIBN, ATO nanoparticles, KH570, Aspergillus niger.
4:Experimental Procedures and Operational Workflow:
Wood delignification with NaClO2 solution, ATO modification with KH570, dispersion in MMA, pre-polymerization with AIBN, infiltration into delignified wood under vacuum, polymerization at 70°C, characterization of morphology, optical properties, thermal conductivity, mechanical properties, infrared heat shielding simulation, and UV shielding tests including weathering and fungal viability assays.
5:Data Analysis Methods:
Data analyzed using spectrophotometers for transmittance, thermal analyzer for conductivity, universal testing machine for stress-strain curves, and colorimeter for color changes; statistical methods not specified.
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SEM
JSM-7500F
JEOL
Observing morphologies of samples
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TEM
Tecnai G20, JEM 2100
FEI
Transmission electron microscopy and energy dispersive spectroscopy
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UV-Vis Spectrophotometer
Cary100
Agilent
Measuring transmittance spectra from 200 to 400 nm
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UV-Vis-NIR Spectrophotometer
Lambda 950
PerkinElmer
Measuring transmittance spectra from 380 to 2500 nm
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FT-IR Spectrometer
ZN-04
Kingslh
Testing physicochemical interactions and functional groups
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Laser Flash Thermal Analyzer
LAF-457
Netzsch
Measuring thermal conductivity
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Electromechanical Universal Testing Machine
CMT5504
MTS
Measuring mechanical properties
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Infrared Lamp
R125
PHILIPS
Simulating solar light irradiation as a heat source
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QUV Accelerated Weathering Tester
QV/Spray
Q-Lab
Performing accelerated weathering tests with UV light
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Portable Spectrocolorimeter
CM-2300D
MINOLTA
Measuring color changes using CIELAB system
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