摘要
采用单因素实验法,分析了尾巨桉新鲜木片与陈旧木片的溶出粒子特征及其微/纳米粒子在常规溶剂抽提和超声波、冷冻、微波预处理抽提中的溶出规律。结果表明,常规溶剂抽提时,新鲜木片溶出的纳米粒子(粒径<100 nm)在体积和粒子数上大于陈旧木片,而大于91.3 nm的粒子在体积和粒子数上小于陈旧木片;随着抽提时间的延长,尾巨桉新旧木片中抽提物的溶出量均呈增加趋势。超声波、冷冻与微波预处理可降低尾巨桉新旧木片溶出粒子的集聚程度,提高抽提物溶出量,其中超声波预处理的作用最为明显。
The characteristics of leached particles from Eucalyptus urophydis wood chips and the leaching rules of micro/nano particles by using the sorbitic-,supersonic-,freezing-,and microwave-extracting approaches were analyzed.The result showed that：（1） In sorbitic-extracting process,the volume and number of nano particles from fresh chips are more than those from old chips.However,the volume and number of the particles large than 91.3 nm from the fresh chips are less than those from old chips,and the extractive mass of micro and nano particles increases with the extracting time.（2） Supersonic extraction,freezing pretreatment and microwave pretreatment decrease the congregation of the leached particles from both fresh chips and old chips,and simultaneously increase the extractive mass.Among the four extracting approaches,the supersonic-extraction is the most effective,microwave pretreatment is the second,and freezing pretreatment is only a little better than sorbitic extraction.
出处
《中国造纸学报》
CAS
CSCD
北大核心
2009年第1期42-45,共4页
Transactions of China Pulp and Paper
基金
国家973计划项目(2007CB210201)
国家自然科学基金(30800868
30671634)
国家公益性行业(林业)科研专项项目(200704020)
中国博士后科学基金(20070420776)
中南林业科技大学青年科学研究基金重点项目(07012A)
关键词
尾巨桉
微/纳米粒子
超声波
冷冻
微波
eucalyptus urophydis
micro and nano particles
supersonic wave
freezing
microwave
