冷等离子体和2D树脂基防护剂对毛竹材的防护效果

采用滑动弧冷等离子体对竹条和圆竹筒进行处理,并将处理后的样品进行复合型防护药剂加压浸渍处理.采用质量增加率、平衡含水率、湿胀率以及竹条和竹筒的抗压强度等指标来考察防护药剂处理后对竹材性能的影响,并观察竹条和圆竹筒防护处理后的发霉情况.实验结果表明,竹条和圆竹筒表面在加压条件下对二羟甲基二羟乙基乙烯脲(2D树脂)+戊唑醇...

Effects on the protection of bamboo by cold plasma and 2D resin-based protective agent

As a kind of high-energy particles,cold plasma can cause physical and chemical changes in contact with the bamboo surface,produce etching on the surfaces,introduce active groups,increase the surface energy of the bamboo material,and then enhance the surface coating performance of the bamboo material and improve the bamboo material protective ability.By using the cold plasma to modify the surfaces of bamboo,the wettability of bamboo surface can be effectively improved and the chemical permeability of bamboo can be enhanced.In this study,the sliding arc cold plasma technique was used to treat bamboo strips and original bamboo culms.The treated samples were subjected to the compound protective agent(dihydroxymethyl dihydroxyvinylurea+tebuconazole and propiconazole+butyl iodopropynyl carbamate) pressure dipping treatment.The weight percent gain,equilibrium moisture content,wet swelling rate and physical mechanical strength as well as other properties were used to investigate the effect of the compound protective agents on the bamboo strips and original bamboo culms,and to continuously observe the mildew phenomenon of bamboo strips and original bamboo culms after the treatment with compound protective agents.The results showed that the plasma treatment and the compound protective agent impregnation treatment with pressure increased the weight percent gain of bamboo strips and original bamboo culms,and decreased the equilibrium moisture content and wet swelling rate,providing the premise for improving the compression strength of bamboo strips and original bamboo culms.The order of positive effects on the weight percent gain,equilibrium moisture content and wet swelling rate as well as the compression strength of bamboo strips and original bamboo culms were:sliding arc cold plasma treatment+impregnation compound protection agent with pressure> impregnation compound protection agent with pressure without sliding arc cold plasma treatment> impregnation compound protection agent with normal condition without any other special treatment.The number of knots also had an effect on the weight percent gain,equilibrium moisture content,and wet swelling rate of bamboo,zero knot was greater than single knot,in turn,the single knot was greater than double knots.Bamboo strips and original bamboo culms have excellent anti-mold performance.After storing for several days even half a year,no mold phenomenon was found either on the wood strips,or on original bamboo culms.The original bamboo culms with sliding arc cold plasma treatment can still maintain the original physical characteristics after being stored for half a year at room atmosphere condition.Most importantly,the surfaces and the end parts of the original bamboo culms were free from mold,decay and cracking.