Preparation of microcrystalline cellulose from agricultural residues and their application as polylactic acid/microcrystalline cellulose composite films for the preservation of Lanzhou lily.
Preparation of microcrystalline cellulose from agricultural residues and their application as polylactic acid/microcrystalline cellulose composite films for the preservation of Lanzhou lily.
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DOI：
10.1016/j.ijbiomac.2022.12.198
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发表时间：
2022-12
影响因子：
8.2
通讯作者：
Haiwei Ren;Zhi‐Gang Xu,;Ming Gao;Xueye Xing;Zhe Ling;Lichao Pan;Yaqin Tian;Y. Zheng;Wenguang Fan;Weixia Yang
中科院分区：
文献类型：
--
作者：
Haiwei Ren;Zhi‐Gang Xu,;Ming Gao;Xueye Xing;Zhe Ling;Lichao Pan;Yaqin Tian;Y. Zheng;Wenguang Fan;Weixia Yang
从甜高粱秆、耶路撒冷、酒糟和中药渣中分离得到微晶纤维素，并对其理化性质和结构进行了表征。将所得微晶纤维素与聚乳酸复合制成兰州百合保鲜包装膜。所制备的微晶纤维素均为纤维素Iβ结构，纯度高，热稳定性好。甜高粱秆微晶纤维素的聚合度（327）和结晶度（70.52%）比其他纤维素高。保鲜膜能有效抑制氧化反应，降低失重率，改善硬度和白度，显著提高百合种球的保鲜效果。以甜高粱秸秆为原料制备的聚乳酸/微晶纤维素复合膜是最有效的。本研究为利用农业废弃物制备微晶纤维素生物相容性保鲜膜提供了一条增值途径。
Microcrystalline celluloses were isolated from four agricultural residues, including sweet sorghum stalk, Jerusalem artichoke stalk, grains stillage, and Chinese herb residue, and characterized in terms of physicochemical and structural properties. The obtained microcrystalline celluloses were composited with polylactic acid as a packing film for the preservation of Lanzhou lily. All the agricultural residues-derived microcrystalline celluloses were in cellulose Iβstructure with high purity and good thermal stability. Microcrystalline celluloses from sweet sorghum stalk had a higher degree of polymerization (327) and crystallinity (70.52 %) than others. The preservation effect of lily bulbs packaged by films were significantly improved indicated by the lessened weight loss rate and the meliorative hardness and whiteness, which ascribe to the repressed oxidation reactions. Polylactic acid/microcrystalline cellulose composite films prepared from sweet sorghum straw have been proved the most effective. This work could offer a value-added outlet for agricultural residues to produce microcrystalline celluloses-based biocompatible films for preservation of Lanzhou lily.