摘要
为提高竹制品加工利用水平,以高温水为传热介质,在温度为120℃、130℃、140℃、150℃,160℃,时间为60min、90min、120min的密闭条件下对毛竹(Phyllostachys heterocycla)进行高温热处理,以饱和蒸汽压控制试验的压力环境,研究毛竹材在不同水热处理条件下颜色及平衡含水率的变化。结果表明,随着热处理温度的升高和时间的延长,毛竹材表面颜色由明黄色向深咖啡色转变,红绿色品指数(a^*)略微上升后下降,趋向于绿色,黄蓝色品指数(b^*)逐步下降,趋向于蓝色。总体色差(△E^*)增大,明度(L^*)下降,竹材平衡含水率下降拐点出现在140℃,与热处理时间相比,热处理温度对竹材颜色及平衡含水率的影响更显著。
In order to improve the levels of processing and utilizing for sympodial bamboo,6 years bamboo(Phyllostachys heterocycla)was thermally modified under hot water,hydrothermal treatment temperature of 120℃,130℃,140℃,150℃,160℃,treatment time of 60 min,90 min,120 min.Research on the change of bamboo color parameters and equilibrium moisture content(EMC)with different process.The main conclusions re concluded as follows:With the improvement of hydrothermal treatment temperature and time,the color of bamboo gradually change from yellow to brown;a^* decreases slightly and then falls,tending to green,b^* gradually decreases,tending to blue.The value of ΔE^* were increased,and had negative relation with L^*,The equilibrium moisture content of bamboo decreased at 140℃;compared with hydrothermal treatment time,temperature on bamboo color and EMC had more significant impact.
作者
陈宣宗
牛帅红
姜年春
王新洲
王丽
李延军
CHEN Xuanzong;NIU Shuaihong;JIANG Nianchun;WANG Xinzhou;WANG Li;LI Yanjun(Nanjing Forestry University,Nanjing 210037;School of Engineering,Zhejiang A&F University,Hangzhou 311300;Zhejiang Province Kaihua Forestry Farm,Kaihua 311300)
出处
《安徽农业大学学报》
CAS
CSCD
2019年第5期815-819,共5页
Journal of Anhui Agricultural University
基金
“十三五”国家重点研发计划(2017YFD0600801)
国家自然科学基金(3197140672)
江苏省科技计划项目(BE2018391)
浙江省级重点研发计划课题(2019C02037)共同资助
关键词
毛竹
高温水热处理
竹材颜色
平衡含水率
bamboo
high temperature hydrothermal treatment
color
equilibrium moisture content
