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当前关于通过合成程序或环境条件变化对绿色基聚合物分子堆积进行改性的正电子研究。

Current Positron Studies on the Modifications of the Molecular Packing in Green-Based Polymers Through Changes in the Synthesis Procedures or Environmental Conditions.

作者信息

Consolati Giovanni, Macchi Carlos, Somoza Alberto

机构信息

Department of Aerospace Science and Technology, Politecnico di Milano, Via LaMasa, 34, 20156 Milano, Italy.

INFN Milan, Via Celoria, 16, 20133 Milan, Italy.

出版信息

Polymers (Basel). 2024 Dec 23;16(24):3611. doi: 10.3390/polym16243611.

DOI:10.3390/polym16243611
PMID:39771462
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11679154/
Abstract

The sensitivity of positron annihilation characteristics to changes in the molecular packing in network-forming polymers has been demonstrated since the early 1980s. Positron annihilation lifetime spectroscopy (PALS) is a unique technique that can provide direct information on the free volume in polymers through the experimental parameters of the free volume hole distribution, their mean value, and volume fraction. This knowledge is currently applied for PALS investigations on the main processes that govern the molecular organization in some green polymers when subjected to different synthesis procedures or environmental conditions (humidity, physical aging, temperature). In this article, which includes a wide repertoire of works published in the last two decades, results of PALS studies on eco-sustainable polymer systems based on starch, chitosan, or vegetable oils, are analyzed and discussed. Many examples are taken from the direct experience of the authors.

摘要

自20世纪80年代初以来，正电子湮灭特性对网络形成聚合物中分子堆积变化的敏感性已得到证实。正电子湮灭寿命谱（PALS）是一种独特的技术，它可以通过自由体积空穴分布、其平均值和体积分数等实验参数，提供有关聚合物中自由体积的直接信息。目前，这些知识被应用于PALS研究，以研究某些绿色聚合物在不同合成程序或环境条件（湿度、物理老化、温度）下分子组织的主要过程。在本文中，分析和讨论了过去二十年发表的大量研究成果，这些成果是关于基于淀粉、壳聚糖或植物油的生态可持续聚合物体系的PALS研究。许多例子来自作者的直接经验。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/0b727b310db9/polymers-16-03611-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/69e5fa7e3f09/polymers-16-03611-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/b6878e644ec1/polymers-16-03611-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/aac3b15586cd/polymers-16-03611-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/e94d50e04972/polymers-16-03611-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/18a801e75090/polymers-16-03611-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/e727a3a34d3f/polymers-16-03611-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/54d1f833c530/polymers-16-03611-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/073c9e8684f6/polymers-16-03611-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/f33c18999879/polymers-16-03611-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/31472fd2f103/polymers-16-03611-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/377c2ee8a9b1/polymers-16-03611-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/3fa27a04a6ab/polymers-16-03611-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/36e9e4c39e59/polymers-16-03611-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/1c5a7672bf06/polymers-16-03611-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/9abbc83f5e18/polymers-16-03611-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/0b727b310db9/polymers-16-03611-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/69e5fa7e3f09/polymers-16-03611-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/b6878e644ec1/polymers-16-03611-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/aac3b15586cd/polymers-16-03611-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/e94d50e04972/polymers-16-03611-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/18a801e75090/polymers-16-03611-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/e727a3a34d3f/polymers-16-03611-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/54d1f833c530/polymers-16-03611-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/073c9e8684f6/polymers-16-03611-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/f33c18999879/polymers-16-03611-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/31472fd2f103/polymers-16-03611-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/377c2ee8a9b1/polymers-16-03611-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/3fa27a04a6ab/polymers-16-03611-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/36e9e4c39e59/polymers-16-03611-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/1c5a7672bf06/polymers-16-03611-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/9abbc83f5e18/polymers-16-03611-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f1c/11679154/0b727b310db9/polymers-16-03611-g016.jpg

相似文献

[1]
Current Positron Studies on the Modifications of the Molecular Packing in Green-Based Polymers Through Changes in the Synthesis Procedures or Environmental Conditions.

Polymers (Basel). 2024-12-23

[2]
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[3]
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[4]
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[5]
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[6]
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[7]
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本文引用的文献

[1]
Characterization and application of LDH with chitosan composites investigated by positron annihilation lifetime spectroscopy and surface texture for the adsorption of methyl orange.

Sci Rep. 2024-7-17

[2]
Probing the Free Volume in Polymers by Means of Positron Annihilation Lifetime Spectroscopy.

Polymers (Basel). 2023-7-23

[3]
Evolution of the free volume during water desorption in thermoplastic starch/citric acid films: In situ positron annihilation studies.

Carbohydr Polym. 2023-6-15

[4]
Tailoring nanohole sizes through the deacetylation process in chitosan powders obtained from squid pens.

Carbohydr Polym. 2022-12-1

[5]
Convenient, nondestructive monitoring and sustained-release of ethephon/chitosan film for on-demand of fruit ripening.

Int J Biol Macromol. 2022-8-1

[6]
Insightful understanding of the correlations of the microstructure and catalytic performances of Pd@chitosan membrane catalysts studied by positron annihilation spectroscopy.

RSC Adv. 2018-1-17

[7]
Antiplasticization and phase behavior in phase-separated modified starch-sucrose blends: A positron lifetime and solid-state NMR study.

Carbohydr Polym. 2020-8-20

[8]
Chitosan: Structural modification, biological activity and application.

Int J Biol Macromol. 2020-12-1

[9]
Effect of Free-Volume Hole Fraction on Dynamic Mechanical Properties of Epoxy Resins Investigated by Pressure-Volume-Temperature Technique.

J Phys Chem B. 2020-3-5

[10]
A study of the structural changes in a chitosan matrix produced by the adsorption of copper and chromium ions.

Carbohydr Polym. 2019-10-15

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