Adel Abeer M, El-Shall Fatma N, Diab Mohamed A
Cellulose and Paper Department, National Research Centre, 33El-Bohouth St. (Former El-Tahrir St.), P.O. 12622, Dokki, Giza, Egypt.
Dyeing, Printing and Textile Auxiliaries Department, National Research Centre, El-Buhouth St. 33, Dokki, Cairo, 12622, Egypt.
Sci Rep. 2025 Jul 11;15(1):25101. doi: 10.1038/s41598-025-08734-4.
Agricultural residues are produced annually; recycling these wastes in various ways is considered economically valuable. In this context, biopolymer-reinforced composite materials were developed to create alternative, eco-friendly, and sustainable resources for different applications. With advancements in innovative chemical techniques, cellulose nanofibers with silica have been simultaneously obtained. Rice residues were transformed into silica-based cellulose nanofibers (SCN) through hydrolysis using ammonium persulfate (APS) under microwave radiation at 70 °C, 1.25 M APS, an irradiation time of 20 min, and a liquor ratio of 1:75. Additionally, rice residue was converted into silica nanostructure SiO via hydrochloric acid hydrolysis followed by calcination at 600 °C. The principal characterizations of the extracted SCN and SiO were evaluated using FTIR, XRD, BET surface area analysis, SEM, TEM, EDX and ζ-potential measurements. To produce cellulose/silica hybrid composites on a paper matrix, co-processing of the isolated SiO and/or SCN, which contained silica, was considered. Different concentrations of [SiO (0.25-3%w/v)/SCN (0.5%w/v)] nanocomposites were used to modify the fabricated paper sheets, with cationic polyacrylamide (CPAM) serving as a binder. Fabricated paper sheets treated with various concentrations of (CPAM/SiO/SCN) nanocomposite solutions were prepared. The impact of SiO and/or SCN on the modified paper's surface structure, strength, barrier, and UV shielding characteristics was examined. To evaluate color properties, the fabricated paper sheets treated with different concentrations of CPAM/SiO/SCN, were silk-screen printed using disperse dye. Under different conditions (temperatures of 170-210 °C and time of 30-60 s.), the printed paper sheets were tested as heat transfer paper in sublimation transfer printing of polyester fabrics. Polyester samples printed using sheets treated with CPAM/0.5% SCN and CPAM/3% SiO showed enhanced color depth. All polyester samples printed with modified sheets demonstrated outstanding fastness properties. Additionally, some treated paper sheets showed remarkable transfer stability during a second printing run.
农业残留物每年都会产生；以各种方式回收这些废物被认为具有经济价值。在此背景下，人们开发了生物聚合物增强复合材料，以创造适用于不同应用的替代、环保和可持续资源。随着创新化学技术的进步，同时获得了含有二氧化硅的纤维素纳米纤维。在70°C、1.25M过硫酸铵（APS）、20分钟的辐照时间和1:75的液比条件下，通过微波辐射下使用过硫酸铵（APS）水解，将稻壳残渣转化为二氧化硅基纤维素纳米纤维（SCN）。此外，通过盐酸水解，然后在600°C下煅烧，将稻壳残渣转化为二氧化硅纳米结构SiO。使用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、比表面积分析（BET）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能量散射X射线光谱（EDX）和ζ电位测量对提取的SCN和SiO进行了主要表征。为了在纸基质上制备纤维素/二氧化硅混合复合材料，考虑了对含有二氧化硅的分离出的SiO和/或SCN进行共处理。使用不同浓度的[SiO（0.25 - 3%w/v）/SCN（0.5%w/v）]纳米复合材料来改性制成的纸张，阳离子聚丙烯酰胺（CPAM）用作粘合剂。制备了用各种浓度的（CPAM/SiO/SCN）纳米复合溶液处理的制成的纸张。研究了SiO和/或SCN对改性纸张的表面结构、强度、阻隔性和紫外线屏蔽特性的影响。为了评估颜色性能，用不同浓度的CPAM/SiO/SCN处理的制成的纸张使用分散染料进行丝网印刷。在不同条件（170 - 210°C的温度和30 - 60秒的时间）下，将印刷后的纸张作为热转印纸用于聚酯织物的升华转印。使用经CPAM/0.5% SCN和CPAM/3% SiO处理的纸张印刷的聚酯样品显示出增强的色深。所有用改性纸张印刷的聚酯样品都表现出出色的色牢度性能。此外，一些处理过的纸张在第二次印刷过程中表现出显著的转印稳定性。
