A Preliminary Study On The Application Of CCC Mixed With Organic Matter For Wood And Bamboo Preservation

In this paper, the leach ability, decay resistance and mold resistance of Chinese white poplar(Populus tomentosa), redpine(Pinus massoniana) and Moso bamboo(Phyllostachys pubescens) treated with chitosan copper-based preservatives were reported and compared with Chromated Copper Arsenate (CCA), Ammoniacal Copper Quaternary (ACQ) and copper Triazole(CuAz). The main research findings were summarized as follows:(1) Anti-fungi PerformancesWood treated with CCC-Y3 have the best resistance against white rot fungi Coriolous versicolor. Mass loss of Chinese white poplar treated with 0.5%CCC-Y3 is nearly zero while mass loss rate of Moso bamboo treated with 0.5%CCC-Y3 is 7.61%, reaching the strongest decay resistance degree. Wood treated with CCC or CCC-Y2 have the better resistance against white rot fungi Coriolous versicolor. Mass loss rate of Chinese white poplar and Moso bamboo treated with 1%CCC is 10.01% and 7.59% respectively. Mass loss rate of Chinese white poplar and Moso bamboo treated with 1% CCC-Y2 is 5.01% and 9.27% respectively. Mass loss rate of Chinese white poplar treated with 2% CCC or CCC-Y2 is nearly zero and mass loss rate of Moso bamboo treated with 2% CCC or CCC-Y2 is less than 5%. CCC-Y1 has poor resistance effects on white rot fungi. All of the test CCC-organic complexes and CCC show good effects on brown rot fungi Poria placenta.(2) Leaching CharacteristicsCopper fixation rate of Chinese white poplar treated with CCC-Y2 or CCC-Y3 are higher compared with other test preservatives. All of the CCC based preservatives have good fixation performance in Masson Pine. Of copper fixation rate of all preservatives, 2% CCC-Y1 is lowest, that is 73%, and the 1% CCC-Y3 is highest, up to 89%. When Moso bamboo used as experimental material, the specimens treated with 1% or 2%CCC-Y2 behave the best, which having 89% and 96% copper fixation rate respectively, followed by CCC and CCC-Y1.(3) Anti-mold effectsBamboo treated with CCC-Y3 has good resistance against Penicillam citrinum, Trichoderma viride and Aspergillus niger. The average preserving effects of 0.5%CCC-Y3 is 75, and the resisting effects of CCC based preservatives increase with the increase of concentration. Mold resistance of CCC, CCC-Y1 and CCC-Y2 are poor.