Department of Chemistry, Faculty of Science and Data Analytics, Institut Teknologi Sepuluh Nopember, Sukolilo, Surabaya, 60111, Indonesia; Department of Food Science and Technology, Faculty of Agriculture, Halu Oleo University, Kendari, Indonesia.
Centre of Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Jl. Tungku Link, BE 1410, Brunei.
Int J Biol Macromol. 2022 Apr 15;204:593-605. doi: 10.1016/j.ijbiomac.2022.02.045. Epub 2022 Feb 12.
Conversion of lignocellulosic biowastes from agricultural industry into nanocrystalline cellulose provides pathway to reduce environmental pollution while enhancing the economic value of biowastes. Nanocellulose (NCC) with uniform morphology was isolated from pepper (Piper nigrum L.) stalk waste (PW) using acid hydrolysis method. The role of inorganic acids (sulfuric acid, hydrochloric acid, phosphoric acid), organic acids (oxalic acid, citric acid, acetic acid) and variation of sonication times were investigated on the physicochemical characteristics, self-assembled structure, crystallinity, particle size, zeta potential and thermal stability of the isolated nanocellulose. Hydrolysis using inorganic acids transformed cellulose from PW into a spherical shaped NCC at ~33-67 nm of average diameter. Meanwhile hydrolysis in organic acids produced rod-shaped NCC at 210-321 nm in length. This study highlighted the role of acidity strength for organic acid and inorganic acid in controlling the level of hydrogen bond dissociation and the dissolution of amorphous fragments, which consequently directing the morphology and the physicochemical properties of NCCs.
将农业产业中的木质纤维素生物废料转化为纳米纤维素，为减少环境污染的同时提高生物废料的经济价值提供了途径。采用酸水解法从胡椒（Piper nigrum L.）茎废料（PW）中分离出形态均匀的纳米纤维素（NCC）。研究了无机酸（硫酸、盐酸、磷酸）、有机酸（草酸、柠檬酸、乙酸）和超声时间变化对分离出的纳米纤维素的物理化学特性、自组装结构、结晶度、粒径、Zeta 电位和热稳定性的影响。使用无机酸水解将 PW 中的纤维素转化为平均直径约为 33-67nm 的球形 NCC。而在有机酸中水解则生成长度为 210-321nm 的棒状 NCC。本研究强调了酸强度在控制有机酸和无机酸中氢键解离水平和无定形片段溶解方面的作用，这反过来又控制了 NCC 的形态和物理化学性质。
