Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Cd. Universitaria, CdMx 04510, Mexico.
Instituto Tecnológico de Toluca, Av. Instituto Tecnológico S/N, Colonia Agrícola Bellavista, C.P. 52149 Metepec, Estado de México, Mexico.
Int J Biol Macromol. 2020 Jul 15;155:324-329. doi: 10.1016/j.ijbiomac.2020.03.222. Epub 2020 Mar 28.
Agricultural residues of Rose flowers (Rosa x hybrida L.) are abundant, cheap, and renewable. These lignocellulosic remains are composed of cellulose, hemicellulose, and lignin. They are an attractive feedstock to produce various value-added products, as microcrystalline cellulose (MCC). The objective of this study was to obtain MCC from residual Rose stems (RS) using a successive alkaline peroxide treatment. X-ray diffraction, Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM) were used to determine the degree of crystallinity, structure characteristics, thermal properties, and morphology, respectively, of MCC. The properties of RS-MCC were compared with those of commercial MCC. The degree of crystallinity of RS-MCC was 70.21%. The X-ray diffraction patterns reveal the presence of Type I cellulose. FTIR showed the absence of non-cellulosic components, mainly lignin, present in the amorphous regions of the RS fibers. Results are promising for taking advantage of agricultural residues as a source of MCC, which could be used as a reinforcing agent in polymeric matrices.
玫瑰（Rosa x hybrida L.）花卉的农业残余物丰富、廉价且可再生。这些木质纤维素残留物由纤维素、半纤维素和木质素组成。它们是生产各种高附加值产品的有吸引力的原料，如微晶纤维素（MCC）。本研究的目的是使用连续碱性过氧化物处理从残余玫瑰茎（RS）中获得 MCC。使用 X 射线衍射、傅里叶变换红外光谱（FTIR）、热重分析（TGA）和扫描电子显微镜（SEM）分别确定 MCC 的结晶度、结构特征、热性能和形态。将 RS-MCC 的性能与商业 MCC 的性能进行了比较。RS-MCC 的结晶度为 70.21%。X 射线衍射图谱表明存在纤维素 I 型。FTIR 表明在 RS 纤维的无定形区域中不存在非纤维素成分，主要是木质素。这些结果为利用农业残余物作为 MCC 的来源提供了有希望的前景，MCC 可用作聚合物基质中的增强剂。
