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采用热压和冷冻干燥技术制备的丙烯酸接枝聚（丁二酸丁二醇酯-对苯二甲酸丁二醇酯）纳米复合材料的酶促降解

Enzymatic Degradation of Acrylic Acid-Grafted Poly(butylene succinate-co-terephthalate) Nanocomposites Fabricated Using Heat Pressing and Freeze-Drying Techniques.

作者信息

Lin Sheng-Hsiang, Wang Hsiang-Ting, Wang Jie-Mao, Wu Tzong-Ming

机构信息

Department of Materials Science and Engineering, National Chung Hsing University, 250 KuoKuang Road, Taichung 402, Taiwan.

出版信息

Materials (Basel). 2020 Jan 14;13(2):376. doi: 10.3390/ma13020376.

DOI:10.3390/ma13020376
PMID:31947565
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7013954/
Abstract

Biodegradable acrylic acid-grafted poly(butylene succinate-co-terephthalate) (g-PBST)/organically modified layered zinc phenylphosphonate (m-PPZn) nanocomposites were effectively fabricated containing covalent bonds between the g-PBST and m-PPZn. The results of wide-angle X-ray diffraction and transmission electron microscopy revealed that the morphology of the g-PBST/m-PPZn nanocomposites contained a mixture of partially exfoliated or intercalated conformations. The isothermal crystallization behavior of the nanocomposites showed that the half-time for crystallization of 5 wt % g-PBST/m-PPZn nanocomposites was less than 1 wt % g-PBST/m-PPZn nanocomposites. This finding reveals that increasing the loading of m-PPZn can increase the crystallization rate of nanocomposites. Degradation tests of g-PBST/m-PPZn nanocomposites fabricated using the heat pressing and the freeze-drying process were performed by lipase from . The degradation rates of g-PBST-50/m-PPZn nanocomposites were significantly lower than those of g-PBST-70/m-PPZn nanocomposites. The g-PBST-50 degraded more slowly due to the higher quantity of aromatic group and increased stiffness of the polymer backbone. The degradation rate of the freeze-drying specimens contained a more extremely porous conformation compared to those fabricated using the heat pressing process.

摘要

通过在接枝聚（丁二酸丁二醇酯-对苯二甲酸丁二醇酯）（g-PBST）和有机改性层状苯基膦酸锌（m-PPZn）之间形成共价键，有效地制备了可生物降解的丙烯酸接枝聚（丁二酸丁二醇酯-对苯二甲酸丁二醇酯）（g-PBST）/有机改性层状苯基膦酸锌（m-PPZn）纳米复合材料。广角X射线衍射和透射电子显微镜的结果表明，g-PBST/m-PPZn纳米复合材料的形态包含部分剥离或插层构象的混合物。纳米复合材料的等温结晶行为表明，5 wt% g-PBST/m-PPZn纳米复合材料的结晶半衰期小于1 wt% g-PBST/m-PPZn纳米复合材料。这一发现表明，增加m-PPZn的负载量可以提高纳米复合材料的结晶速率。使用热压和冷冻干燥工艺制备的g-PBST/m-PPZn纳米复合材料的降解测试是由来自……的脂肪酶进行的。g-PBST-50/m-PPZn纳米复合材料的降解速率明显低于g-PBST-70/m-PPZn纳米复合材料。由于聚合物主链中芳香族基团数量较多且刚性增加，g-PBST-50降解得更慢。与热压工艺制备的样品相比，冷冻干燥样品的降解速率包含更极端的多孔构象。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/69ac7e29c6c7/materials-13-00376-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/fc9714c8f87d/materials-13-00376-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/5fdf71824cc7/materials-13-00376-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/7c322335ae3a/materials-13-00376-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/e4058a99ad76/materials-13-00376-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/8e104d8b750b/materials-13-00376-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/7ffb9e8bb0d9/materials-13-00376-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/4c412f3ac97a/materials-13-00376-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/69ac7e29c6c7/materials-13-00376-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/fc9714c8f87d/materials-13-00376-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/5fdf71824cc7/materials-13-00376-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/7c322335ae3a/materials-13-00376-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/e4058a99ad76/materials-13-00376-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/8e104d8b750b/materials-13-00376-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/7ffb9e8bb0d9/materials-13-00376-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/4c412f3ac97a/materials-13-00376-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ffd8/7013954/69ac7e29c6c7/materials-13-00376-g008.jpg

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