南京林业大学学报(自然科学版)
南京林業大學學報(自然科學版)
남경임업대학학보(자연과학판)
JOURNAL OF NANJING FORESTRY UNIVERSITY(NATURAL SCIENCE EDITION)
2014年
2期
1-5
,共5页
邓健超%陈复明%王戈%邱亚新%张丹%程海涛
鄧健超%陳複明%王戈%邱亞新%張丹%程海濤
산건초%진복명%왕과%구아신%장단%정해도
竹束单板层积材%菲克第二定律%扩散系数%厚度膨胀率
竹束單闆層積材%菲剋第二定律%擴散繫數%厚度膨脹率
죽속단판층적재%비극제이정률%확산계수%후도팽창솔
laminated bamboo-bundle veneer lumber%Fick′s second law%diffusion coefficient%thickness swelling rate
采用慈竹经帚化后的竹束单板,制备了不同密度的竹束单板层积材( BLVL);对板材进行不同温度的水浸处理,利用菲克定律分析了水浸泡温度及板材密度对竹束单板层积材吸湿行为的影响。结果表明:采用菲克第二定律扩散模型预测竹束单板层积材的长期吸湿行为具有一定的可行性,但在高温条件下(63℃以上)模型预测结果存在一定的偏差;温度对竹束单板层积材的吸湿行为影响显著,随着水浸泡温度的升高,板材的吸湿速率加快,平衡时的吸湿质量增加率及厚度膨胀率增大;密度对竹束单板层积材的吸湿行为影响较大,竹束单板层积材密度较大时,吸湿膨胀变形较小,板材的尺寸稳定性较好。
採用慈竹經帚化後的竹束單闆,製備瞭不同密度的竹束單闆層積材( BLVL);對闆材進行不同溫度的水浸處理,利用菲剋定律分析瞭水浸泡溫度及闆材密度對竹束單闆層積材吸濕行為的影響。結果錶明:採用菲剋第二定律擴散模型預測竹束單闆層積材的長期吸濕行為具有一定的可行性,但在高溫條件下(63℃以上)模型預測結果存在一定的偏差;溫度對竹束單闆層積材的吸濕行為影響顯著,隨著水浸泡溫度的升高,闆材的吸濕速率加快,平衡時的吸濕質量增加率及厚度膨脹率增大;密度對竹束單闆層積材的吸濕行為影響較大,竹束單闆層積材密度較大時,吸濕膨脹變形較小,闆材的呎吋穩定性較好。
채용자죽경추화후적죽속단판,제비료불동밀도적죽속단판층적재( BLVL);대판재진행불동온도적수침처리,이용비극정률분석료수침포온도급판재밀도대죽속단판층적재흡습행위적영향。결과표명:채용비극제이정률확산모형예측죽속단판층적재적장기흡습행위구유일정적가행성,단재고온조건하(63℃이상)모형예측결과존재일정적편차;온도대죽속단판층적재적흡습행위영향현저,수착수침포온도적승고,판재적흡습속솔가쾌,평형시적흡습질량증가솔급후도팽창솔증대;밀도대죽속단판층적재적흡습행위영향교대,죽속단판층적재밀도교대시,흡습팽창변형교소,판재적척촌은정성교호。
This study employed the bloomed bamboo veneer bundle of Neosinocalamus affinis to produce different density of laminated bamboo-bundle veneer lumber ( BLVL) . The effect of soaking temperature and target density on moisture absorption behavior had been studied by Fick′s law. The results showed that the diffusion modelof Fick′s law provided a good prediction for long term hygroscopic behavior of BLVL. While some prediction errors existed at higher temperature (≥63 ℃) , temperature had a significant effect on moisture absorption behavior, and the equilibrium ratio of weight gain and thickness swelling were enlarged with soaking temperature, rise and the moisture sorption rate was accelerated;The density of BLVL had certain effect on its moisture absorption behavior that the panel performed low hygroscopic ex-pansion deformation and better dimensional stability with higher density.