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仿生高强度蒙脱石-海藻酸盐复合膜：不同二价金属阳离子交联的影响

Bioinspired High-Strength Montmorillonite-Alginate Hybrid Film: The Effect of Different Divalent Metal Cation Crosslinking.

作者信息

Wang Jiaen, Song Tianliang, Chen Huaxiang, Ming Wei, Cheng Zhiming, Liu Jingwen, Liang Benliang, Wang Yuting, Wang Guangsheng

机构信息

School of Physical Science and Engineering, Beijing Jiaotong University, Beijing 100044, China.

Petrochemical Research Institute, PetroChina, Beijing 102200, China.

出版信息

Polymers (Basel). 2022 Jun 16;14(12):2433. doi: 10.3390/polym14122433.

DOI:10.3390/polym14122433
PMID:35746010
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9229400/
Abstract

The natural nacre has a regular ordered layered structure of calcium carbonate tablets and ion crosslinking proteins stacked alternately, showing outstanding mechanical properties. Inspired by nacre, we fabricated different divalent metal cation-crosslinked montmorillonite-alginate hybrid films (MMT-ALG-X2+; X2+ = Cu2+, Cd2+, Ba2+, Ca2+, Ni2+, Co2+ or Mn2+). The effect of ionic crosslinking strength and hydrogen bond interaction on the mechanical properties of the nacre-mimetics was studied. With the cations affinities with ALG being increased (Mn2+ < Co2+ = Ni2+ < Ca2+ < Ba2+ < Cd2+ < Cu2+), the tensile strength of nacre-mimetics showed two opposite influence trends: Weak ionic crosslinking (Mn2+, Co2+, Ni2+ and Ca2+) can synergize with hydrogen bonds to greatly increase the tensile properties of the sample; Strong ionic crosslinking (Ba2+, Cd2+, Cu2+) and hydrogen bonding form a competitive relationship, resulting in a rapid decrease in mechanical properties. Mn2+ crosslinking generates optimal strength of 288.0 ± 15.2 MPa with an ultimate strain of 5.35 ± 0.6%, obviously superior to natural nacre (135 MPa and 2%). These excellent mechanical properties arise from the optimum synergy of ion crosslinking and interfacial hydrogen bonds between crosslinked ALG and MMT nanosheets. In addition, these metal ion-crosslinked composite films show different colors, high visible transparency, and excellent UV shielding properties.

摘要

天然珍珠母具有由碳酸钙片和离子交联蛋白交替堆叠而成的规则有序层状结构，展现出优异的机械性能。受珍珠母启发，我们制备了不同的二价金属阳离子交联蒙脱石-海藻酸盐混合膜（MMT-ALG-X2+；X2+ = Cu2+、Cd2+、Ba2+、Ca2+、Ni2+、Co2+或Mn2+）。研究了离子交联强度和氢键相互作用对仿珍珠母机械性能的影响。随着阳离子与海藻酸盐亲和力的增加（Mn2+ < Co2+ = Ni2+ < Ca2+ < Ba2+ < Cd2+ < Cu2+），仿珍珠母的拉伸强度呈现出两种相反的影响趋势：弱离子交联（Mn2+、Co2+、Ni2+和Ca2+）可与氢键协同作用，极大地提高样品的拉伸性能；强离子交联（Ba2+、Cd2+、Cu2+）与氢键形成竞争关系，导致机械性能迅速下降。Mn2+交联产生的最佳强度为288.0 ± 15.2 MPa，极限应变为5.35 ± 0.6%，明显优于天然珍珠母（135 MPa和2%）。这些优异的机械性能源于交联海藻酸盐与蒙脱石纳米片之间离子交联和界面氢键的最佳协同作用。此外，这些金属离子交联复合膜呈现出不同颜色、高可见光透明度和优异的紫外线屏蔽性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/3aab6defd924/polymers-14-02433-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/193eaaa33883/polymers-14-02433-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/44220df16ee9/polymers-14-02433-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/c65ef1a0d375/polymers-14-02433-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/f437c95afc72/polymers-14-02433-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/5f4956b4c8a6/polymers-14-02433-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/3aab6defd924/polymers-14-02433-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/193eaaa33883/polymers-14-02433-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/44220df16ee9/polymers-14-02433-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/c65ef1a0d375/polymers-14-02433-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/f437c95afc72/polymers-14-02433-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/5f4956b4c8a6/polymers-14-02433-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/28ff/9229400/3aab6defd924/polymers-14-02433-g006.jpg

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