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Extraction and comparison of cellulose nanocrystals from lemon (Citrus limon) seeds using sulfuric acid hydrolysis and oxidation methods
Carbohydrate Polymers ( IF 11.2 ) Pub Date : 2020-03-17 , DOI: 10.1016/j.carbpol.2020.116180
Huan Zhang , Yuan Chen , Shanshan Wang , Liang Ma , Yong Yu , Hongjie Dai , Yuhao Zhang

In this study, the lemon (Citrus limon) seeds as typical agricultural processing wastes were utilized to extract cellulose nanocrystals (CNCs) by sulfuric acid hydrolysis (S-LSCNC), ammonium persulfate oxidation (A-LSCNC) and TEMPO oxidation (T-LSCNC). The properties of CNCs were comparatively investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetric analysis (TG), and atomic force microscope (AFM), and the application in Pickering emulsions was also preliminarily studied. The results showed that all CNCs maintained cellulose Iβ structure and had a good dispersion regardless of extraction methods. Differently, T-LSCNC had a higher yield, larger size and lower CrI than A-LSCNC and S-LSCNC. Comparatively, A-LSCNC showed the highest CrI and S-LSCNC showed the lowest size. For the application of Pickering emulsions, S-LSCNC and A-LSCNC showed a better ability as Pickering stabilizers than T-LSCNC. This study is beneficial for developing the potential utilization of CNCs from lemon by-products.



中文翻译:

提取与柠檬纤维素纳米晶体的比较(柠檬),使用硫酸水解和氧化方法的种子

在这项研究中,柠檬(柑橘柠檬)作为典型的农业加工废料的种子被用于通过硫酸水解(S-LSCNC),过硫酸铵氧化(A-LSCNC)和TEMPO氧化(T-LSCNC)提取纤维素纳米晶体(CNC)。通过傅里叶变换红外光谱(FTIR),X射线光电子能谱(XPS),X射线衍射(XRD),热重分析(TG)和原子力显微镜(AFM)对CNC的性能进行了比较研究还对Pickering乳液中的“ A”进行了初步研究。结果表明,无论采用何种提取方法,所有的CNCs都保持纤维素Iβ结构并具有良好的分散性。与A-LSCNC和S-LSCNC相比,T-LSCNC具有更高的产率,更大的尺寸和更低的CrI。相比较而言,A-LSCNC的CrI最高,S-LSCNC的尺寸最小。对于Pickering乳液的应用,与T-LSCNC相比,S-LSCNC和A-LSCNC作为Pickering稳定剂具有更好的能力。这项研究有利于开发柠檬副产品中CNC的潜在利用。

更新日期:2020-03-19
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