林业机械与木工设备
林業機械與木工設備
임업궤계여목공설비
FORESTRY MACHINERY & WOODWORKING EQUIPMENT
2015年
6期
34-38,39
,共6页
木材%SiO2溶胶%渗透性%初始含水率%粒径
木材%SiO2溶膠%滲透性%初始含水率%粒徑
목재%SiO2용효%삼투성%초시함수솔%립경
wood%SiO2 Sol%penetration%initial moisture content%particle size
采用两种粒径（30 nm和150 nm）的SiO2溶胶真空浸渍不同含水率（绝干、气干、调湿）的欧洲赤松和南方松边材，比较其24 h内吸液率变化规律和24 h增重率，并通过质量法分析硅溶胶处理材轴向SiO2的浓度梯度，从而考察处理材的初始含水率对SiO2溶胶在木材中渗透性的影响。研究结果表明：（1）两种木材均在绝干状态下吸液率最低，30 nm硅溶胶在气干状态下吸液率最高，而150 nm硅溶胶在调湿状态下吸液率最高。（2）初始含水率对增重率的影响与吸液率不同，30 nm硅溶胶在调湿状态下浸渍木材的增重率低于绝干状态，欧洲赤松气干状态的增重率最高。（3）初始含水率对试材中整体SiO2量的影响与增重率结果基本一致，欧洲赤松中SiO2轴向分布梯度远高于南方松，其渗透的均匀性较差。
採用兩種粒徑（30 nm和150 nm）的SiO2溶膠真空浸漬不同含水率（絕榦、氣榦、調濕）的歐洲赤鬆和南方鬆邊材，比較其24 h內吸液率變化規律和24 h增重率，併通過質量法分析硅溶膠處理材軸嚮SiO2的濃度梯度，從而攷察處理材的初始含水率對SiO2溶膠在木材中滲透性的影響。研究結果錶明：（1）兩種木材均在絕榦狀態下吸液率最低，30 nm硅溶膠在氣榦狀態下吸液率最高，而150 nm硅溶膠在調濕狀態下吸液率最高。（2）初始含水率對增重率的影響與吸液率不同，30 nm硅溶膠在調濕狀態下浸漬木材的增重率低于絕榦狀態，歐洲赤鬆氣榦狀態的增重率最高。（3）初始含水率對試材中整體SiO2量的影響與增重率結果基本一緻，歐洲赤鬆中SiO2軸嚮分佈梯度遠高于南方鬆，其滲透的均勻性較差。
채용량충립경（30 nm화150 nm）적SiO2용효진공침지불동함수솔（절간、기간、조습）적구주적송화남방송변재，비교기24 h내흡액솔변화규률화24 h증중솔，병통과질량법분석규용효처리재축향SiO2적농도제도，종이고찰처리재적초시함수솔대SiO2용효재목재중삼투성적영향。연구결과표명：（1）량충목재균재절간상태하흡액솔최저，30 nm규용효재기간상태하흡액솔최고，이150 nm규용효재조습상태하흡액솔최고。（2）초시함수솔대증중솔적영향여흡액솔불동，30 nm규용효재조습상태하침지목재적증중솔저우절간상태，구주적송기간상태적증중솔최고。（3）초시함수솔대시재중정체SiO2량적영향여증중솔결과기본일치，구주적송중SiO2축향분포제도원고우남방송，기삼투적균균성교차。
In order to investigate the influence of initial moisture content on penetration of SiO2 Sols in wood, SiO2 Sols with two different particle sizes(30 nm and 150 nm)are used to impregnate sapwood of Scots pine and Southern pine with different initial moisture contents(oven dried, air dried and conditioned)after vacuum process, then the time-dependent liquid absorption during 24 h and the weight percent gain at 24 h are investigated. In addition, the longitudinal SiO2 concentration gradients of wood are obtained with a mass method. The research results show:(1)For both wood species, the liquid adsorptions in wood under oven dried conditions are always the lowest. In addition, the liquid adsorptions of 30 nm and 150 nm silica sols are the highest under air dried and conditioned moisture content conditions respectively.(2)The influence of initial moisture content on weight percent gain(WPG)is different from that on liquid adsorption. That is, the WPGs of both wood species at conditioned state after penetration by 30 nm silica sol are lower than that under oven dried conditions. And for Scots pine, the WPG under air dried conditions is the highest.(3)The influence of initial moisture content on the whole SiO2 in samples is basically consistent with WPG results. The longitudinal distribution gradients of SiO2 in Scots pine are much higher than those in southern pine, demonstrating the poor uniformity of penetration in it.
