摘要
以30年生薄壳山核桃人工林木材为对象,对其化学成分及其变异规律进行研究,并运用X射线衍射法对纤维素结晶度进行测定分析。结果表明:薄壳山核桃木材中,苯醇抽提物质量分数为1.92%,1%NaOH抽提物质量分数为16.14%,Klason木质素质量分数为23.80%,综纤维素质量分数为82.77%,α-纤维素质量分数为45.20%,硝酸乙醇纤维素质量分数为48.83%,灰分质量分数为0.74%,纤维素结晶度为38.64%。薄壳山核桃木材的化学组分轴向变化株间保持一致,其中,苯醇抽提物、1%NaOH抽提物、灰分、木质素的质量分数轴向递增,α-纤维素、硝酸乙醇纤维素、综纤维素的质量分数轴向递减;纤维素结晶度在轴向上呈先增后减趋势,从大到小依次为中部、基部、梢部。
Three 30-year Carya illinoensis plantation woods were studied on the chemical eomponents and their variation pattern. The cellulose crystallinity was determined by X-ray diffraction speetrnm. In Carya illinoensis, the contents of the benzene- alcohol extracts, 1% NaOH extracts, klason lignin, holocellulose, α-cellulose, nitric acid-ethanol cellulose and ash were 1.92%, 16. 14%, 23.80%, 82.77%, 45.2%, 48.83% and 0. 74%, respectively. The cellulose crystallinity was 38.64%. Besides, the variation trend of chemical components along axial direetion among different samples kept consistent, where the contents of benzene-alcohol extracts, ash, 1% NaOH extracts and lignin inereased progressively, while those of α-cellulose, nitric aeid-ethanol cellulose, and holocellulose deereased progressively. The cellulose crystallinity increased firstly and then declined. The sequence of cellulose erystallinity from great to small was middle part, stem base and tip.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2014年第6期79-82,共4页
Journal of Northeast Forestry University
基金
国家自然科学基金项目(31270599)资助
关键词
薄壳山核桃
人工林木材
化学性质
X射线衍射法
Carya illinoensis
Plantation wood
Chemical properties
X-ray diffraction spectrum
