Coletti Alessia, Valerio Antonio, Vismara Elena
Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, via Mancinelli 7, Milan 20131, Italy.
Materials (Basel). 2013 May 15;6(5):2043-2058. doi: 10.3390/ma6052043.
High-grade cellulose (97% α-cellulose content) of 48% crystallinity index was extracted from the renewable marine biomass waste using H₂O₂ and organic peracids following an environmentally friendly and chlorine-free process. This cellulose appeared as a new high-grade cellulose of waste origin quite similar to the high-grade cellulose extracted from more noble starting materials like wood and cotton linters. The benefits of α-cellulose recovery from were enhanced by its transformation into cellulose acetate and cellulose derivative Fully acetylated was prepared by conventional acetylation method and easily transformed into a transparent film. with a molar substitution (MS) of 0.72 was produced by quenching Fenton's reagent (H₂O₂/FeSO₄) generated cellulose radicals with GMA. GMA grafting endowed high-grade cellulose from with adsorption capability. removes β-naphthol from water with an efficiency of 47%, as measured by UV-Vis spectroscopy. After hydrolysis of the glycidyl group to glycerol group, the modified was able to remove -nitrophenol from water with an efficiency of 92%, as measured by UV-Vis spectroscopy. α-cellulose and from waste can be considered as new materials of potential industrial and environmental interest.
采用过氧化氢和有机过酸，通过环保且无氯的工艺，从可再生海洋生物质废弃物中提取出结晶度指数为48%的高等级纤维素（α-纤维素含量97%）。这种纤维素呈现出一种源自废弃物的新型高等级纤维素，与从木材和棉短绒等更高贵起始原料中提取的高等级纤维素非常相似。通过将其转化为醋酸纤维素和纤维素衍生物，从[具体来源]中回收α-纤维素的益处得到了增强。通过常规乙酰化方法制备了完全乙酰化的[产物名称]，并易于转化为透明薄膜。通过用甲基丙烯酸缩水甘油酯（GMA）淬灭芬顿试剂（H₂O₂/FeSO₄）产生的纤维素自由基，制备了摩尔取代度（MS）为0.72的[产物名称]。GMA接枝赋予了源自[具体来源]的高等级纤维素吸附能力。通过紫外可见光谱法测定，[产物名称]从水中去除β-萘酚的效率为47%。在缩水甘油基团水解为甘油基团后，经改性的[产物名称]通过紫外可见光谱法测定，能够从水中去除对硝基苯酚，效率为92%。源自[具体来源]废弃物的α-纤维素和[产物名称]可被视为具有潜在工业和环境价值的新材料。
