Using carboxylated cellulose nanofibers to enhance mechanical and barrier properties of collagen fiber film by electrostatic interaction
Using carboxylated cellulose nanofibers to enhance mechanical and barrier properties of collagen fiber film by electrostatic interaction
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利用羧化纤维素纳米纤维通过静电相互作用增强胶原纤维膜的机械和阻隔性能
DOI：
10.1002/jsfa.8809
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发表时间：
2018
影响因子：
4.1
通讯作者：
Yonghao Ni
中科院分区：
文献类型：
--
作者：
Wenhang Wang;Xiuling Zhang;Cong Li;Guanhua Du;Hongjie hang;Yonghao Ni
背景胶原蛋白基薄膜，包括肠衣，在肉类工业中具有广阔的应用前景，但仍需改善其较差的性能。本文研究了羧化纤维素纳米纤维（CNF）对胶原膜的增强作用，基于阳离子酸膨胀的胶原纤维与阴离子羧化纤维素纳米纤维之间的分子间静电相互作用。结果CNF的加入降低了胶原纤维悬浮液的zeta -电位，但增大了其粒径，对ph值的影响不大。此外，CNF的加入提高了胶原纤维的抗拉强度，但降低了其伸长率，并显著提高了其阻水蒸气和阻氧性能。扫描电镜和原子力显微镜分析表明，由于CNF含量为50 g kg - 1或更低，膜具有均匀的交织网络，CNF均匀嵌入胶原纤维基质中。此外，CNF的加入增加了膜的厚度和不透明度，以及膨胀率。结论CNF的掺入使胶原纤维膜在适当的浓度范围内（≤50 g kg - 1胶原纤维）具有良好的力学性能和屏障性能，这与胶原纤维与CNF的静电反应密切相关，从而形成均匀、相容的空间网络，表明CNF在可食用肠衣等胶原蛋白膜中的潜在应用前景。©2017化学工业学会
BACKGROUNDCollagen‐based films including casings with a promising application in meat industry are still needed to improve its inferior performance. In the present study, the reinforcement of carboxylated cellulose nanofibers (CNF) for collagen film, based on inter‐/intra‐ molecular electrostatic interaction between cationic acid‐swollen collagen fiber and anionic carboxylated CNF, was investigated.RESULTSAdding CNF decreased the zeta‐potential but increased particle size of collagen fiber suspension, with little effect on pH. Furthermore, CNF addition led to a higher tensile strength but a lower elongation, and the water vapor and oxygen barrier properties were improved remarkably. Because the CNF content was 50 g kg–1or lower, the films had a homogeneous interwoven network, and CNF homogeneously embedded into collagen fiber matrix according to the scanning electron microscopy and atomic force microscopy analysis. Additionally, CNF addition increased film thickness and opacity, as well as swelling rate.CONCLUSIONThe incorporation of CNF endows collagen fiber films good mechanical and barrier properties over a proper concentration range (≤ 50 g kg–1collagen fiber), which is closely associated with electrostatic reaction of collagen fiber and CNF and, subsequently, the form of the homogenous, compatible spatial network, indicating a potential applications of CNF in collagenous protein films, such as edible casings. © 2017 Society of Chemical Industry