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The semiconducting wood/PANI composites were synthesized via in situ polymerization of aniline monomer which was in advance impregnated into the wood structure.Thus,the wood products obtained combined characteristics of conductivity of the PANI polymer and the characteristics of natural wood veneer.Light microscopy and scanning electronic microscopy images showed that PANI was uniformly dispersed within the cell lumen and cell wall of the wood veneer.The weight percent gain and volume bulk increase of the semiconducting wood products were 16.13%and 6.21%,respectively.Equilibrium uptake studies showed that the wood veneer was less hydrophilic,caused by the addition of hydrophobic PANI.The electrical conductivity of the wood/PANI composite ranged from 2.57 × 10-5 to 9.23 × 10-3 S cm?1,which was tuned by changing the phosphate acid concentration.Fourier transform infrared spectra revealed that PANI was closely polymerized onto the wood substrate and allowed the accessibility of the amine groups of the aniline monomer to the hydroxyl groups of the wood material.Furthermore,X-ray diffraction analysis indicated that after the in situ polymerization of aniline monomer,the crystal lattice of cellulose crystalline region wasnt damaged,while the relative crystallinity of wood was increased.