CAJ | 학술논문

本研究以NaOH-乙醇水溶液为溶剂体系对竹木质素进行热降解，主要考察了NaOH浓度、反应温度、反应时间、乙醇用量等条件对竹木质素降解转化为酚类化合物的影响。通过GC-MS及FT-IR对降解产物进行分析检测，得出最佳反应条件为：竹木质素5 g，NaOH浓度（基于乙醇水溶液）20 g/L，乙醇10 mL，反应时间2 h，反应温度240℃。在此条件下，降解产物中总的酚类化合物的相对峰面积为73.88%，残渣率为30.67%。竹木质素的降解主要产物是酚类化合物：苯酚（17.98%）、2-甲氧基苯酚（16.49%）及1,2-苯二酚（10.03%）。与现有文献相比，本文竹木质素在碱性乙醇溶剂体系中降解能够获得较高产量的酚类化合物，有望实现竹木质素的高值化利用。
본연구이NaOH-을순수용액위용제체계대죽목질소진행열강해，주요고찰료NaOH농도、반응온도、반응시간、을순용량등조건대죽목질소강해전화위분류화합물적영향。통과GC-MS급FT-IR대강해산물진행분석검측，득출최가반응조건위：죽목질소5 g，NaOH농도（기우을순수용액）20 g/L，을순10 mL，반응시간2 h，반응온도240℃。재차조건하，강해산물중총적분류화합물적상대봉면적위73.88%，잔사솔위30.67%。죽목질소적강해주요산물시분류화합물：분분（17.98%）、2-갑양기분분（16.49%）급1,2-분이분（10.03%）。여현유문헌상비，본문죽목질소재감성을순용제체계중강해능구획득교고산량적분류화합물，유망실현죽목질소적고치화이용。
The thermal degradation of bamboo lignin in NaOH-ethanol solvent system was studied in this work. The effects of NaOH concentration, reaction temperature, reaction time, and dosage of ethanol on the phenolic products were investigated, respectively. The degradation products were analyzed by GC-MS and FT-IR. The optimum conditions were achieved as follows:mbamoo lignin=5 g, CNaOH (in alcohol aqueous systems)=20 g/L, Vethanol=10 mL, reaction temperature is 240oC and reaction time is 2 h. The total relative peak area of phenolic products in the degradation products was 73.88%, and the yield of residue was 30.67%. The main products of bamboo lignin degradation were phenols, such as phenol (17.98%), 2-methoxyphenol (16.49%) and 1,2-benzenediol (10.03%). The results indicated that higher yield of phenolic products was obtained under the optimized conditions compared with the reports. This work showed the potential to degrade bamboo lignin into high value products in NaOH-ethanol solvent system.