Puițel Adrian Cătălin, Suditu Gabriel Dan, Danu Maricel, Ailiesei Gabriela-Liliana, Nechita Mircea Teodor
Faculty of Chemical Engineering and Environmental Protection "Cristofor Simionescu", "Gheorghe Asachi" Technical University of Iasi, No. 73, 700050 Iaşi, Romania.
"Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iași, Romania.
Polymers (Basel). 2022 Apr 20;14(9):1662. doi: 10.3390/polym14091662.
In this paper, we describe an experimental study on the hot alkali extraction of hemicelluloses from wheat straw and corn stalks, two of the most common lignocellulosic biomass constituents in Romania. The chemical compositions of the raw materials were determined analytically, and the relevant chemical components were cellulose, hemicelluloses, lignin, and ash. Using the response surface methodology, the optimum values of the hot alkaline extraction parameters, i.e., time, temperature, and NaOH concentration, were identified and experimentally validated. The physicochemical characterization of the isolated hemicelluloses was performed using HPLC, FTIR, TG, DTG, and 1H-NMR spectroscopy. The main hemicellulose components identified experimentally were xylan, arabinan, and glucan. The study emphasizes that both corn stalks and wheat straw are suitable as raw materials for hemicellulose extraction, highlighting the advantages of alkaline pretreatments and showing that optimization methods can further improve the process efficiency.
在本文中，我们描述了一项关于从麦秸和玉米秸秆中热碱提取半纤维素的实验研究，麦秸和玉米秸秆是罗马尼亚最常见的木质纤维素生物质成分中的两种。通过分析确定了原材料的化学成分，相关化学成分包括纤维素、半纤维素、木质素和灰分。采用响应面法确定并通过实验验证了热碱提取参数（即时间、温度和氢氧化钠浓度）的最佳值。使用高效液相色谱法（HPLC）、傅里叶变换红外光谱法（FTIR）、热重分析法（TG）、微商热重分析法（DTG）和核磁共振氢谱法（1H-NMR）对分离出的半纤维素进行了物理化学表征。实验确定的主要半纤维素成分是木聚糖、阿拉伯聚糖和葡聚糖。该研究强调，玉米秸秆和麦秸都适合作为半纤维素提取的原材料，突出了碱性预处理的优势，并表明优化方法可以进一步提高工艺效率。
