| Modification is an important method for improving the performance and extendingapplication field of wood. Wood organic functional composite has low heat resistance and badimpact strength, while wood inorganic functional composite has bad water resistance andtoughness. Selecting plantation as experiment material, in the base of analyzing home andabroad research results, with the combination of experiment and theoretical analysis, theresearch focused on the technology and performance of Chinese fir treated with siciliasol/acrylate emulsion. For improving aesthetic in appearance, the lumbers were brushed. Then,the treated wood was made into solid wood floor. The research will widen the application fieldof plantations, also will open up new avenues for the efficient use of plantations and providesupports for saving and substitution of hard wood.The main research results are as follows:1Under the test, the best preparation of sicilia sol/acrylate emulsion was synthesized byemulsion polymerization. The results of FTIR indicated that organic polymer and inorganicparticles were united by chemical bond. When preparation in quantity, the optimal temperaturewas70℃, reacting time was1.5h, and the ratio SDS to OP was1:2.2Considering the compositive performance, in the experimental range, the optimalimpregnating process parameters of Chinese fir were as follows: the vacuum time beforeimpregnating was10minutes, impregnating pressure was1.0MPa, impregnating time was90minutes, and the vacuum time after impregnating was10minutes. The optimal impregnatingprocess parameters of Masson pine were as follows: the vacuum time before impregnating was10minutes, impregnating pressure was0.8MPa, impregnating time was30minutes, and thevacuum time after impregnating was10minutes.3FTIR spectrum analysis showed that composite emulsion interacted with-OH and C=Oon the cell wall and formed Si-O-C and-C(=O)-O-ester bond. According to composite spectrum and untreated wood spectrum, it was found that–OH absorption peak becameweaken,-O-absorption peak had strengthened,-C=O and-Si-O-Si absorption peak were notobvious. TG and DSC analysis indicated that the mass lose rate was decreased and thermalstability of wood composite had improved. Unchanged XRD diffraction peak positionindicated that the lattice parameters of treated wood were not changed. The diffraction peakstrength of treated wood decreased. The crystallinity of treated wood diminished.4MOE, MOR, and flat surface hardness of Chinese fir increased by10.27%,17.26%, and17.75%respectively after impregnated with sicilia sol/acrylate emulsion. The shrinkageefficiency of Chinese fir impregnated with emulsion declined, and the dimension stability hadimproved. Bonding properties will not be affected after wood impregnated with emulsion. Thebonding strength and wood failure were similar to that of untreated wood. The synthesis ofMLR, HRR, and THR results indicated that the fire-retardant property of wood impregnatedwith emulsion was also improved. The TTI of composite was longer slightly than that ofuntreated wood, and EHC declined somewhat. The SEA varied with burning time. The TSR,CO yield, CO2yield of composite were higher than that of untreated wood. Wood impregnatedwith emulsion was no negative effect on thermal conductivity. On the contrary, the thermalconductivity was improved. The film adhesion and hardness of paint membrane of woodimpregnated with emulsion had improved. The results showed that wood impregnated withemulsion was also no negative effect on finishing.5studying on the grain manifestation and application of composite, the results were asfollows: the optimal brushed depth of Chinese fir was0.4mm to0.5mm. In the condition ofsame brushed depth, the effect was related to density of wood. The density was lower, theeffect was better. The spectrum of brushed depth was in accord with the surface grain by eyes.It is viable to access the brushed effect by digital microscope.6The brushed solid wood floor and flat solid wood floor were made from Chinese firimpregnated with sicilia sol/acrylate emulsion. All kinds of performance index were up to thestandards of GB/T15036.1~2-2009. |
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