نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، نور، مازندران، ایران.
2 گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تربیت مدرس
3 گروه جنگلداری و صنایع سلولزی، دانشکده منابع طبیعی، دانشگاه صنعتی خاتم الانبیاء بهبهان، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The production and application of nano-fibrillated cellulose and lignocellulose have been developed in a wide range of fields. Nevertheless, the diversity of raw materials and processing methods results in considerable variations in nanofibril properties, highlighting the need for simple and efficient indices to assess their quality for benchmarking. The objective of this study was to investigate the feasibility of using turbidity of suspension as an indirect criterion for benchmarking the quality of nano-fibrillated cellulose and lignocellulose. For this purpose, three types of poplar kraft pulp with different lignin contents were produced and subjected to nano-fibrillation using an ultra-fine grinder. The chemical composition, crystallinity , average nanofibril diameter, turbidity, fibrillation yield, and mechanical properties of the produced films were evaluated. According to the results, turbidity was identified as a significant indicator for benchmarking of nano-fibrillated lignocellulose. Specifically, a 38% variation in turbidity was observed depending on the type of raw material, whereas benchmarking based on tensile strength of the produced films, despite requiring substantial time, measurement, of the maximum observed difference in properties between the lowest and highest values was estimated at 20%. Moreover, results indicated that nano-fibrillated lignocellulose containing 6.6% lignin exhibited the lowest turbidity index, which was attributed to more effective fibrillation. Therefore, turbidity measurement is introduced as a simple, low-cost, and non-destructive approach for evaluating nanofibril quality, alongside conventional indices such as tensile strength and fibrillation yield. This method can further play a valuable role even for the development of on-line industrial-scale assessment of nano-fibrillated lignocellulose.
کلیدواژهها [English]