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Scientia Silvae Sinicae ›› 2007, Vol. 43 ›› Issue (08): 106-110.doi: 10.11707/j.1001-7488.20070818

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Mechanical and Preservative Performances of Bamboo Wood Treated with Chitosan-Metal Complexes

Sun Fangli1,2,Duan Xinfang3,Mao Shengfeng1,Lü Jianquan1,Wang Jianhui1   

  1. 1.Engineering School of Zhejiang Forestry College Lin' an 311300;2.Polymer Science Department ofZhejiang University Hangzhou 311300;3.Research Institute of Wood Industry,CAF Beijing 100091
  • Received:2006-02-24 Revised:1900-01-01 Online:2007-08-25 Published:2007-08-25

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Abstract:

The mechanical strength,gluing performance and decay-resistance of 4-year-old bamboo wood treated with chitosan copper/zinc complexes(CCC and CZC),CCB(copper,chromium,boron composites),ACQ and zinc chloride were reported in this paper.Results showed as follows:1)The decay resistance of CCC against Poria placenta was inferior to CCB and ACQ.But the ability of resisting yellow-rot fungi increased greatly with the increase of CCC concentration.When the metal ion retention in bamboo wood reached 5.141 kg·m-3,mass loss of the treated bamboo wood was below 6.1%.2)The decay resistance of CZC against Poria placenta was evidently lower than that of CCC,CCB and ACQ,but slightly better than that of zinc chloride.When the metal ion retention in bamboo wood exceeded 5.091 kg·m-3,mass losses of the treated bamboo wood were between 26.4% and 29.0%.3)The mechanical strength and gluing performance dropped at different degrees,especially for CCB preservative.Among the experimental indexes,the values of bending modulus and bending strength decreased the most,while the compression strength vertical to grain and the gluing strength had nearly no changes except for CCB.

Key words: bamboo wood, chitosan metal complex, decay-resistance, mechanical strength, gluing performance