摘要
为了实现速生杉木代替樟子松,用于装配式建筑轻型木结构,提升杉木的应用价值,研究采用硅酸钠溶液在一次负压-正压处理条件下浸渍改性杉木。结果表明:改性杉木的密度、静曲强度和弹性模量较未处理材显著提升,吸水率明显下降。SEM和XPS表征显示,硅酸钠填充于杉木的纤维间隙中,以“Si—O—Si”结构链接成膜,以“Si—O—C”结构固着在杉木上。径向湿胀性和极限氧指数的测试表明,改性杉木的径向气干湿胀性仅为0.81%,径向饱水湿胀性为2.56%,极限氧指数达29.8%,均优于樟子松。色差分析表明,改性杉木表面色调接近于云南红豆杉,表现出硬木的视觉效果。成本核算表明,密度0.37 g/cm3的速生杉木通过一次浸渍增重30%,成本约为1551.6元/m3,相较于进口樟子松1800元/m3的价格具有一定优势,有望代替樟子松用于装配式轻型木结构建筑中。
In order to replace camphor pine with fast-growing Chinese fir for prefabricated light wood structures and enhance the application value of Chinese fir,in this study,sodium silicate solution was used to modify Chinese fir through one"negative pressure positive pressure"impregnation.The density,modulus of rupture,and modulus of elasticity of modified Chinese fir significantly increased compared to the untreated one,while the water absorption rate decreased.SEM and XPS characterization showed that sodium silicate was filled in the fiber gap of Chinese fir,linked into a film with a"Si-O-Si"structure,and fixed on the Chinese fir with a"Si-O-C"structure.The tests of radial moisture expansion and ultimate oxygen index showed that the modified Chinese fir had a radial gas dry moisture expansion of only 0.81%,a radial water saturated moisture expansion of 2.56%,and an ultimate oxygen index of 29.8%,both of which were better than those of camphor pine.Color difference analysis showed that the surface color of modified Chinese fir is similar to that of Yunnan yew,exhibiting the visual effect of hardwood.Cost accounting showed that the density of 0.37 g/cm3 of fir wood is increased by 30%through one dipping,and the cost is about 1551.6 yuan/m3,which had a certain advantage compared to the price of imported camphor pine at 1800 yuan/m3.It was expected to replace camphor pine in the use of lightweight wood structures in prefabricated buildings.
作者
汪述平
王洪松
魏任重
郇冬冬
马同华
陆铜华
WANG Shu-ping;WANG Hong-song;WEI Ren-zhong;HUAN Dong-dong;MA Tong-hua;LU Tong-hua(Treezo New Material Technology Group Co.,Ltd.,Hangzhou 311100,Zhejiang,P.R.China)
出处
《林产工业》
北大核心
2025年第7期17-23,共7页
China Forest Products Industry
基金
国家重点研发计划重点专项(2022YFD2200705)
杭州市科技发展计划(202204T12)。
关键词
杉木
浸渍
硅酸钠
樟子松
尺寸稳定性
Chinese fir
Impregnation
Sodium silicate
Camphor pine
Size stability
作者简介
第一作者:汪述平,男,工程师,研究方向为木材-无机复合材料,E-mail:wangsp1@treezogroup.com;通讯作者:陆铜华,男,高级经济师,研究方向为人造板的绿色生产及智能制造,E-mail:lutonghua@treezogroup.com。
