| Wood is a renewable wood material that human beings rely on for survival.Its advantages of superior environmental science and material science make it widely used in industry and life.However,defects such as easy decay,cracking,discoloration,and poor weather resistance of wood make the utilization rate of wood greatly reduced.Aiming at the defects of wood,this research focused on fast-growing poplar and Pinus sylvestris.Two types of wood were treated with polydimethylsiloxane(PDMS)and melamine formaldehyde resin(MF2).Magnetron sputtering was used to deposit ZnO and Al films on the surface of the original wood and the treated wood to improve the functionality of the wood.The surface morphology and performance of the composite material were characterized and tested.The ZnO film was prepared on the surface of fast-growing poplar wood by magnetron sputtering.After 120 min of sputtering the ZnO film,the hardness of the poplar/ZnO composite material increased by 2.6 times,the elastic modulus increased by 5 times,and the hydrophobic contact angle reached 142.2°,which effectively improved the mechanical properties and hydrophobic properties of the fast-growing original wood.ZnO nanofilms were prepared by magnetron sputtering on the surface of poplar veneer treated by PDMS.PDMS small molecules can be interspersed on the surface of each filament,and then form a durable hydrophobic structure with a contact angle of 124.5° or more.When the film was deposited for 120 min,the hydrophobic angle can reach 146.2°.The surface of wood-based composite materials prepared by different treatment methods can form a dense and flat film with neatly arranged nanoparticles.When the sputtering time reached 120 min,the total chromaticity difference curve tended to be horizontal,which effectively improved the anti-photochromic ability of the wood surface.Magnetron sputtering was used to prepare aluminum film on the surface of the original wood of Pinus sylvestris.When the sputtering time is 60 min,the sheet resistance of the horizontal lines on the sample surface reaches 695.9 m?,and the sheet resistance of the parallel lines reaches 227.2 m?.The surface elastic modulus of the sample is 50.2 times that of the original wood,the hardness is 47 times that of the original wood,and the surface hydrophobic angle can reach 132.7°.It can be seen that the use of magnetron sputtering method can quickly and efficiently realize the metalization of the wood surface without any burden on the environment,so that the wood surface has electrical conductivity,and effectively improves the mechanical properties and hydrophobic properties of the wood.Magnetron sputtering method was used to deposit aluminum film on the surface of Pinus sylvestris treated with MF2.Excellent electrical conductivity can be achieved on the sample surface after 15 min of sputtering.Under sputtering conditions with a substrate temperature of 200?,the cross-grain sheet resistance was 647.87 m?,and the along-grain sheet resistance was 218.30 m?.The conductivity of the sample was still stable.The combined treatment changed the microstructure of the wood surface,effectively improved the carbonization of the wood surface caused by changing the substrate temperature for a long time,and prepared a wood-based composite material with durable hydrophobic properties and better electrical conductivity.The use of magnetron sputtering to prepare wood-based inorganic nanocomposites with excellent hydrophobic properties,anti-photochromic properties,mechanical properties and electrical conductivity,which expanded the application range of wood and provided new ideas and feasibility for wood modification. |
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