{"title":"通过球磨加工改变具有疏水性介孔二氧化硅的聚酰亚胺复合膜的介电性能","authors":"Kun-Hao Luo, Kuan-Ying Chen, Yun-Yen Yang, Jui-Ming Yeh","doi":"10.1016/j.micromeso.2024.113245","DOIUrl":null,"url":null,"abstract":"<div><p>This research work investigated the impact of the ball-milling (BM) process on the dielectric properties of polyimide (PI) composite membranes incorporating hydrophobic mesoporous silica (HMS) particles. Initially, HMS particles were synthesized through base-catalyzed sol-gel reactions among APTES, MTMS, and TEOS, utilizing D-(−)-Fructose as a template. Following synthesis, the HMS particles underwent ball-milling to fine-tune corresponding specific surface area and average particle size. Three distinctive ball-milled HMS variants (referred to as BMS) were thoroughly characterized using FTIR, <sup>13</sup>C NMR, <sup>29</sup>Si-NMR spectra, DLS, BET, CA, TGA, SEM, and TEM techniques. Subsequently, a series of PI composite membranes were fabricated and subjected to characterization via FTIR, EDS, CA, and TGA analyses. It should be noted that the three distinctive BM treated HMS was found to exhibit higher specific surface area and hydrophobicity as compared to non-BM treated HMS based on the data of BET and CA, respectively. Moreover, the surface area and hydrophobicity of ball-milled HMS exhibited the upward trend of BMS1 < BMS2 < BMS3. Subsequently, the dielectric constant (<em>D</em><sub><em>k</em></sub>) and dielectric loss (<em>D</em><sub><em>f</em></sub>) of PI and its composite membranes containing HMS particles measured at frequency of 10 GHz was found to show the downward trend. For example, the <em>D</em><sub><em>k</em></sub> of PI composite membranes: PI/BMS3 (3.34) < PI/BMS2 (3.41) < PI/BMS1 (3.55) < PI/HMS (3.58) < PI (3.66). On the other hand, the <em>D</em><sub><em>f</em></sub> of PI composite membranes: PI-BMS3 (0.0113) < PI/BMS2 (0.0114) < PI/BMS1(0.0115) < PI/HMS (0.0121) < PI (0.0123). This resulting decreasing trend of dielectric constant of as-prepared composite membranes may be attributed to the incorporated of HMS particles in PI membrane exhibiting lower moisture absorption (<em>D</em><sub><em>k</em></sub> of water = 80) and higher surface area (<em>D</em><sub><em>k</em></sub> of air = 1) based on the TGA and CA, respectively.</p></div>","PeriodicalId":392,"journal":{"name":"Microporous and Mesoporous Materials","volume":null,"pages":null},"PeriodicalIF":4.8000,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Modulating dielectric properties of polyimide composite membranes with hydrophobic mesoporous silica via ball milling processing\",\"authors\":\"Kun-Hao Luo, Kuan-Ying Chen, Yun-Yen Yang, Jui-Ming Yeh\",\"doi\":\"10.1016/j.micromeso.2024.113245\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This research work investigated the impact of the ball-milling (BM) process on the dielectric properties of polyimide (PI) composite membranes incorporating hydrophobic mesoporous silica (HMS) particles. Initially, HMS particles were synthesized through base-catalyzed sol-gel reactions among APTES, MTMS, and TEOS, utilizing D-(−)-Fructose as a template. Following synthesis, the HMS particles underwent ball-milling to fine-tune corresponding specific surface area and average particle size. Three distinctive ball-milled HMS variants (referred to as BMS) were thoroughly characterized using FTIR, <sup>13</sup>C NMR, <sup>29</sup>Si-NMR spectra, DLS, BET, CA, TGA, SEM, and TEM techniques. Subsequently, a series of PI composite membranes were fabricated and subjected to characterization via FTIR, EDS, CA, and TGA analyses. It should be noted that the three distinctive BM treated HMS was found to exhibit higher specific surface area and hydrophobicity as compared to non-BM treated HMS based on the data of BET and CA, respectively. Moreover, the surface area and hydrophobicity of ball-milled HMS exhibited the upward trend of BMS1 < BMS2 < BMS3. Subsequently, the dielectric constant (<em>D</em><sub><em>k</em></sub>) and dielectric loss (<em>D</em><sub><em>f</em></sub>) of PI and its composite membranes containing HMS particles measured at frequency of 10 GHz was found to show the downward trend. For example, the <em>D</em><sub><em>k</em></sub> of PI composite membranes: PI/BMS3 (3.34) < PI/BMS2 (3.41) < PI/BMS1 (3.55) < PI/HMS (3.58) < PI (3.66). On the other hand, the <em>D</em><sub><em>f</em></sub> of PI composite membranes: PI-BMS3 (0.0113) < PI/BMS2 (0.0114) < PI/BMS1(0.0115) < PI/HMS (0.0121) < PI (0.0123). This resulting decreasing trend of dielectric constant of as-prepared composite membranes may be attributed to the incorporated of HMS particles in PI membrane exhibiting lower moisture absorption (<em>D</em><sub><em>k</em></sub> of water = 80) and higher surface area (<em>D</em><sub><em>k</em></sub> of air = 1) based on the TGA and CA, respectively.</p></div>\",\"PeriodicalId\":392,\"journal\":{\"name\":\"Microporous and Mesoporous Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.8000,\"publicationDate\":\"2024-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Microporous and Mesoporous Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1387181124002671\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microporous and Mesoporous Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1387181124002671","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
摘要
这项研究工作探讨了球磨(BM)工艺对含有疏水性介孔二氧化硅(HMS)颗粒的聚酰亚胺(PI)复合膜介电性能的影响。首先,以 D-(-)-Fructose 为模板,通过碱催化 APTES、MTMS 和 TEOS 之间的溶胶-凝胶反应合成 HMS 颗粒。合成后,对 HMS 颗粒进行球磨,以微调相应的比表面积和平均粒径。利用傅立叶变换红外光谱、13C NMR、29Si-NMR 光谱、DLS、BET、CA、TGA、SEM 和 TEM 技术对三种不同的球磨 HMS 变体(简称 BMS)进行了全面表征。随后,制备了一系列 PI 复合膜,并通过傅立叶变换红外光谱、电子发射光谱、化学分析和热重分析对其进行了表征。值得注意的是,根据 BET 和 CA 的数据,与未经过 BM 处理的 HMS 相比,经过三种不同 BM 处理的 HMS 分别表现出更高的比表面积和疏水性。此外,BMS1 < BMS2 < BMS3 的表面积和疏水性呈上升趋势。随后,发现在 10 GHz 频率下测量的 PI 及其含有 HMS 颗粒的复合膜的介电常数(Dk)和介电损耗(Df)呈下降趋势。例如,PI 复合膜的 DkPI/BMS3(3.34);PI/BMS2(3.41);PI/BMS1(3.55);PI/HMS(3.58);PI(3.66)。另一方面,PI 复合膜的 Df:PI-BMS3(0.0113);PI/BMS2(0.0114);PI/BMS1(0.0115);PI/HMS(0.0121);PI(0.0123)。所制备的复合膜介电常数呈下降趋势,这可能是由于 HMS 颗粒加入到 PI 膜中,根据 TGA 和 CA 分别显示出较低的吸湿性(水的 Dk = 80)和较高的比表面积(空气的 Dk = 1)。
Modulating dielectric properties of polyimide composite membranes with hydrophobic mesoporous silica via ball milling processing
This research work investigated the impact of the ball-milling (BM) process on the dielectric properties of polyimide (PI) composite membranes incorporating hydrophobic mesoporous silica (HMS) particles. Initially, HMS particles were synthesized through base-catalyzed sol-gel reactions among APTES, MTMS, and TEOS, utilizing D-(−)-Fructose as a template. Following synthesis, the HMS particles underwent ball-milling to fine-tune corresponding specific surface area and average particle size. Three distinctive ball-milled HMS variants (referred to as BMS) were thoroughly characterized using FTIR, 13C NMR, 29Si-NMR spectra, DLS, BET, CA, TGA, SEM, and TEM techniques. Subsequently, a series of PI composite membranes were fabricated and subjected to characterization via FTIR, EDS, CA, and TGA analyses. It should be noted that the three distinctive BM treated HMS was found to exhibit higher specific surface area and hydrophobicity as compared to non-BM treated HMS based on the data of BET and CA, respectively. Moreover, the surface area and hydrophobicity of ball-milled HMS exhibited the upward trend of BMS1 < BMS2 < BMS3. Subsequently, the dielectric constant (Dk) and dielectric loss (Df) of PI and its composite membranes containing HMS particles measured at frequency of 10 GHz was found to show the downward trend. For example, the Dk of PI composite membranes: PI/BMS3 (3.34) < PI/BMS2 (3.41) < PI/BMS1 (3.55) < PI/HMS (3.58) < PI (3.66). On the other hand, the Df of PI composite membranes: PI-BMS3 (0.0113) < PI/BMS2 (0.0114) < PI/BMS1(0.0115) < PI/HMS (0.0121) < PI (0.0123). This resulting decreasing trend of dielectric constant of as-prepared composite membranes may be attributed to the incorporated of HMS particles in PI membrane exhibiting lower moisture absorption (Dk of water = 80) and higher surface area (Dk of air = 1) based on the TGA and CA, respectively.
期刊介绍:
Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal.
Topics which are particularly of interest include:
All aspects of natural microporous and mesoporous solids
The synthesis of crystalline or amorphous porous materials
The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic
The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions
All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials
Adsorption (and other separation techniques) using microporous or mesoporous adsorbents
Catalysis by microporous and mesoporous materials
Host/guest interactions
Theoretical chemistry and modelling of host/guest interactions
All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.