[1]姚晴,蔡家斌*.热处理辐射松吸湿解吸等温线的测定与分析[J].林业工程学报,2018,3(03):35-41.[doi:10.13360/j.Issn.2096-1359.2018.03.006]
 YAO Qing,CAI Jiabin*.Determination and analysis of moisture adsorption and desorption isotherms of heat-treated Radiata pine[J].Journal of Forestry Engineering,2018,3(03):35-41.[doi:10.13360/j.Issn.2096-1359.2018.03.006]
点击复制

热处理辐射松吸湿解吸等温线的测定与分析()
分享到:

《林业工程学报》[ISSN:1001-8081/CN:32-1160/S]

卷:
3
期数:
2018年03期
页码:
35-41
栏目:
木材科学与技术
出版日期:
2018-05-15

文章信息/Info

Title:
Determination and analysis of moisture adsorption and desorption isotherms of heat-treated Radiata pine
文章编号:
2096-1359(2018)03-0035-07
作者:
姚晴蔡家斌*
南京林业大学材料科学与工程学院,南京 210037
Author(s):
YAO Qing CAI Jiabin*
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037,China
关键词:
辐射松 木材热处理 动态水分吸附 平衡含水率 等温吸湿模型
Keywords:
Radiata pine wood heat treatment dynamic vapor sorption equilibrium moisture content sorption isotherm model wood drying
分类号:
S781.7; O522+.1
DOI:
10.13360/j.Issn.2096-1359.2018.03.006
文献标志码:
A
摘要:
为了筛选出适合新西兰辐射松的等温吸湿解吸模型,以新西兰辐射松板材为研究对象,经热处理温度为160,170,180,190,200和210℃,处理时间为2.0 h的热处理后,通过动态水分吸附仪研究热处理材的平衡含水率与热处理温度的关系,同时选用PEK模型及6种吸湿解吸等温线模型对平衡含水率数据进行非线性拟合并对其拟合效果进行评价,以确定最佳拟合模型及其参数。结果表明:在相同湿度条件下,热处理材平衡含水率最高为15.102%,低于对照材16.323%,相同处理温度的木材在相同湿度下,吸湿平衡含水率小于解吸平衡含水率; 不同处理温度的木材吸湿解吸平衡含水率随热处理温度的升高而逐渐降低。PEK模型可以预测木材在吸湿和解吸过程中的含水率,其拟合度R2在0.99以上。在6种吸湿解吸等温线模型中,GAB模型为最优拟合模型,可以预测不同环境湿度下木材的平衡含水率,其拟合度R2在0.99以上。
Abstract:
As an effective modification method for wood, heat treatment improves the dimensional stability of timber by lowering its hygroscopicity. The purpose of this study was to analyzed the effect of heat treatment temperature on the equilibrium moisture content(EMC)of heat-treated wood by using the dynamic vapor sorption(DVS)apparatus, and the EMCs obtained from DVS measurements were fitted by the parallel exponential kinetics(PEK)model, BET(Brunauer-Emmett-Teller), GAB(Guggenheim-Anderson-deBoer), Halsey, Henderson, Oswin, and Smith sorption isotherms models, so as to determine the best fitting model and its parameters. Radiata pine(Pinus radiata D.Don)timber was used as a tested material and heat-treated with steam at 160℃, 170℃, 180℃, 190℃, 200℃ and 210℃, respectively, for 2.0 h. The EMC of heat-treated wood was studied by using the dynamic vapor sorption(DVS)apparatus. Then the EMC was analyzed by parallel exponential kinetics(PEK)model and six typical sorption isotherm models. The resulte showed that the relative humidity(RH), the adsorption and desorption EMCs of the heat-treated wood(15.102%)were lower than those of the control sample(16.323%). At the same RH and heat treatment temperature, the EMC was lower in adsorption than that in desorption process, and the moisture content in both adsorption and desorption processes increased with the increase of heat treatment temperature and relative humidity. Under 25℃ and 70% RH, the EMC of treated wood that underwent adsorption were 6.302%-10.188%, while that of the control sample was 11.433%. The EMC of wood decreased by about 44.88% after the heat treatment. The treated wood that underwent desorption attained the EMC between 8.068% and 12.800%, while the control sample was 13.772%. The EMC of heat-treated wood decreased by 41.42% compared with that of the control sample. The results of the PEK model showed an excellent fit to the sorption-desorption curve of the heat-treated wood(R2>0.99). Among the 6 typical sorption isotherm models, the GAB model showed a good fit to the experimental EMC of wood(R2 > 0.99). The heat treatment with steam improved the dimensional stability of Radiata pine. The increase in heat treatment temperature led to a decrease in the EMC. The PEK model could be used to fit the moisture absorption and desorption process of wood. The GAB model was most optimal isotherm model for Radiata pine. It could predict the equilibrium moisture content of wood at different RHs.

参考文献/References:

[1] 郝发义,卢立新. 食品水分吸附等温线实验方法研究进展[J]. 包装工程, 2013,34(7):118-122.
HAO F Y,LU L X. Application of dynamic vapor sorption on the research of moisture sorption characteristics of fermented biscuit[J]. Packaging Engineering, 2013,34(7):118-122.
[2] YANG Z, ZHU E L, ZHU Z S. Water desorption isotherm and drying characteristics of green soybean[J]. Journal of Stored Products Research, 2015, 60(1): 25-30.
[3] ARGYROPOULOS D, ALEX R, KOHLER R,et al. Moisture sorption isotherms and isosteric heat of sorption of leaves and stems of lemon balm(Melissa officinalis L.)established by dynamic vapor sorption[J]. LWT-Food Science and Technology, 2012, 47(2): 324-331.
[4] TAITANO L Z, SINGH R P, LEE J H, et al. Thermodynamic analysis of moisture adsorption isotherms of raw and blanched almonds[J]. Journal of Food Process Engineering, 2012,35(6): 840-850.
[5] 邱光应,彭桂兰,吴绍锋,等. 花椒吸附等温线及热力学性质[J]. 食品科学,2015,36(21):1-5.
QIU G Y,PENG G L,WU S F, et al. Adsorption isotherms and thermodynamic properties of Zanthoxylum bungeanum[J]. Food Science,2015,36(21):1-5.
[6] 郑龙金,何雁,张俊鸿,等. 黄芩饮片等温吸附与解吸曲线及热力学性质研究[J]. 中国中药杂志,2016,41(5):830-837.
ZHENG L J,HE Y,ZHANG J H, et al. Isothermal adsorption, desorptionand thermodynamic properties of Scutellaria baicalensis pieces[J]. China Journal of Chinese Materia Medica,2016,41(5):830-837.
[7] HARTLEY I D. Application of the Guggenheim-Anderson-de Boer sorption isotherm model to Klinki pine(Araucaria klinkii Lauterb.)[J]. Holzforschung, 2000, 54:661-673.
[8] HARTLEY I D, AVRAMIDIS S.Water clustering phenomenon in two softwoods during adsorption and desorption processes[J]. Journal of the Institute of Wood Science, 1994, 13(4):467-474.
[9] 王云阳,张丽,王绍金,等. 澳洲坚果果仁粉水分解吸-吸附等温线的测定与分析[J]. 农业工程学报, 2012,(22):288-292.
WANG Y Y, ZHANG L, WANG S J, et al. Determination and analysis of water desorption and adsorption isotherms of macadamia nut kernel flour[J]. Transactions of the Chinese Society of Agricultural Engineering, 2012, 28(22): 288-292.
[10] 张哲. 茶叶物理特性及吸湿解吸平衡规律研究[D]. 武汉:华中农业大学,2012.
ZHNG Z. Research on the physical properties and moisture sorption isotherms of tea leaves[J]. Wuhan:Huazhong Agricultural University,2012.
[11] 文友先,张家年,张声华,等. 谷物吸附与解吸过程中的热力学参数[J]. 粮食与饲料工业, 1998(9):18-19.
WEN Y X,ZHANG J N,ZHANG S H, et al. The thermodynamic parameters during the sorption and desorption of grain[J]. Cereal & Feed Industry, 1998(9):18-19.
[12] YAMAMOTO S,NAKANO T, NORIMOTO M, et al. Analysis of water adsorption of bamboos on the basis of Hailwood & Horrobin theory[J]. Mokuzai Gakkaishi,2005,51(6):372-379.
[13] JALALUDIN Z, HILL C A S, XIE Y J, et al. Analysis of the water vapour sorption isotherms of thermally modified acacia and sesendok[J]. Wood Material Science & Engineering, 2010, 5(3/4):194-203.
[14] HILL C A S, NORTON A J, NEWMAN G. The water vapour sorption properties of sitka spruce determined using a dynamic vapour sorption apparatus[J]. Wood Science and Technology, 2010,44(3): 497-514.
[15] 史蔷. 热处理对圆盘豆木材性能影响及其机理研究[D]. 北京:中国林业科学研究院,2011.
SHI Q.The mechanism and effect on the properties of heat-treated Okan wood[D]. Beijing:Chinese Academy of Forestry, 2011.
[16] 丁涛,王长菊,彭文文. 基于拉曼光谱分析的热处理松木吸湿机理研究[J]. 林业工程学报, 2016, 1(5):15-19.
DING T,WANG C J,PENG W W. A theoretical study of moisture sorption behavior of heat-treated pine wood using Raman spectroscopic analysis[J]. Journal of Forestry Engineering, 2016,1(5):15-19.
[17] 金花. 稻谷吸附与解吸等温线计算模型及模拟研究[D].保定:河北农业大学,2011.
JIN H. The Study on computing model and simulation of adsorption and desorption isotherms of rice[D].Baoding: Hebei Agricultural University, 2011.
[18] 汤成成,贾艾玲,王雅洁,等.柴胡提取物吸湿过程的模型拟合[J]. 中国实验方剂学杂志,2016,22(22):7-11.
TANG C C,JIA A L,WANG Y J,et al. Model fitting of moisture adsorption process for bupleuri Radix extract[J]. Chinese Journal of Experimental Tradition Medical Formulae,2016,22(22):7-11.
[19] 刘成梅,周国辉,万婕,等.大米淀粉解吸等温线与吸附等温线的拟合模型研究[J]. 食品工业科技,2014,35(10):198-201.
LIU C M,ZHOU G H,WAN J, et al. Study on the model fitting of moisture desorption isotherm and absorption isotherm of rice starch[J]. Science and Technology of Food Industry,2014,35(10):198-201.
[20] 李辉,林河通,林毅雄,等.干制荔枝果肉吸附等温线及热力学性质[J]. 农业工程学报,2014,30(22):309-315.
LI H,LIN H T,LIN Y X, et al. Moisture sorption isotherms and thermodynamic properties of dried litchi pulp[J]. Transactions of the Chinese Society of Agricultural Engineering, 2014, 30(22): 309-315.

相似文献/References:

[1]牛焕琼.澳大利亚辐射松木材性状遗传变异研究概述[J].林业工程学报,2011,25(05):7.

备注/Memo

备注/Memo:
收稿日期:2017-09-03 修回日期:2017-12-23
基金项目:安徽省科技攻关项目(1704a07020076)。
作者简介:姚晴,女,研究方向为木材热处理改性。通信作者:蔡家斌,男,教授。E-mail:nldfloor@163.com
更新日期/Last Update: 2018-05-15