Comparative study on material properties of wood-ash alkali and commercial alkali treated Sterculia fiber
Comparative study on material properties of wood-ash alkali and commercial alkali treated Sterculia fiber
复制标题
DOI：
10.1007/s10570-022-04610-w
复制
发表时间：
2022-05-23
期刊：
影响因子：
5.7
通讯作者：
Neupane, Bhanu Bhakta
中科院分区：
文献类型：
--
作者：
Kandel, Krishna Prasad;Adhikari, Menuka;Neupane, Bhanu Bhakta
纸浆、造纸和相关行业消耗大量商业碱来加工原纤维和/或回收废物。商业碱的低成本替代品将有助于降低生产和回收成本以及全球碱的使用。在这项研究中，我们从木灰中提取碱，并使用碱来加工从传统上重要的纤维植物胖大海（当地称为 Murgilo 或 Mudilo）中获得的木质纤维素纤维，作为概念验证。将木灰碱 (WAA) 处理的纤维的材料性能与 5% 氢氧化钠处理的纤维进行比较。发现 WAA 和氢氧化钠处理的净重损失分别为 29.1 +/- 2.6 和 41 +/- 3.3%。在这两种方法中，重量损失是由于半纤维素和木质素的去除造成的，这与纤维宽度的减小以及 FTIR 光谱中木质素和半纤维素特征带的减弱一致。有趣的是，两种方法产生的纤维具有非常相似的机械强度。系统比较了两种方法获得的纤维素纤维的结晶度、纤维表面形貌和热稳定性。这些发现表明，WAA 处理方法可能是一种加工木质纤维素生物质的低成本方法。[图表]。
Pulp, paper, and related industries consume large amount of commercial alkali to process raw fiber and/or recycle waste. A low-cost alternative to commercial alkali would be useful to reduce production and recycling costs and global alkali use. In this research, we extracted alkali from wood ash and, as a proof of concept, used the alkali to process lignocellulose fiber obtained from Sterculia villosa (locally known as Murgilo or Mudilo), a traditionally important fibrous plant. Material properties of wood-ash alkali (WAA) treated fiber were compared with 5% sodium hydroxide treated fiber. The net weight loss on WAA and sodium hydroxide treatment was found to be 29.1 +/- 2.6 and 41 +/- 3.3%, respectively. In both methods, the weight loss resulted from the removal of hemicellulose and lignin consistent with reduction of fiber width and weakening of lignin and hemicellulose characteristic bands in FTIR spectra. Interestingly, both methods resulted in fiber having very similar mechanical strength. Cellulose crystallinity, fiber-surface morphology, and thermal stability of cellulose fiber obtained from two methods were systematically compared. These findings suggested that WAA treatment method could be a low-cost method for processing lignocellulose biomass.[GRAPHICS].