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Preparation and properties of colorless and transparent polyimide-silica nanocomposite films
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Xi REN1, Xuewei WANG2, Xiao LI2, Yanjiang JIA1, Xinxin ZHI1, Changxu YANG1, Xiaolei WANG1, Jingang LIU1
Insulating Materials | 2023, 56(2) : 54 - 62
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Insulating Materials | 2023, 56(2): 54-62
• Polyimide Film Special Issue •
Preparation and properties of colorless and transparent polyimide-silica nanocomposite films
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Xi REN1, Xuewei WANG2, Xiao LI2, Yanjiang JIA1, Xinxin ZHI1, Changxu YANG1, Xiaolei WANG1, Jingang LIU1
Affiliations
  • 1Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
  • 2Weihai Newera Kesense New Materials Co., Ltd., Weihai 264200, China
Published: 2023-02-20 doi: 10.16790/j.cnki.1009-9239.im.2023.02.008
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A semi-alicyclic polyimide resin (TFCPI) and the derived colorless and transparent polyimide film (TFCPI-0) were prepared by one-step high-temperature polycondensation using 1S,2R,4S,5R-hydrogenated pyromellitic dianhydride (H-PMDA) and a fluoro-containing aromatic diamine 2,2′-bis(trifluoromethyl)benzidine (TFMB). Then, a series of colorless and transparent polyimide/SiO2 composite films with different loading amounts of nano-sized silica fillers were prepared via mechanical blending method by mixing TFCPI matrix with dispersion liquid of colloidal nano-silica/N,N-dimethylacetamide (DMAC). The results show that the loading amounts of nano-silica in the composite films can reach to 25%. The derived composite film TFCPI-25 shows the optical transmittance at the wavelength of 450 nm (T450) and yellow index (b*) values of 87.5% and 1.56, respectively, which are slightly inferior to those of TFCPI-0 (T450=88.5%, b*=0.91). The 5% weight loss temperatures (T5%) and glass transition temperature (Tg) of TFCPI-25 is at the same level with that of TFCPI-0. However, the storage modulus of TFCPI-25 at 50℃ (E′50) and its linear coefficient of thermal expansion (CTE) in the range of 50-250℃ is 4.86 GPa and 30.9×10-6 K-1, respectively, which are obviously superior to those of TFCPI-0 (E′50=3.02 GPa, CTE=39.6×10-6 K-1).

polyimide  /  colloidal silica  /  nanocomposite films  /  optical properties  /  thermal properties
Xi REN, Xuewei WANG, Xiao LI, Yanjiang JIA, Xinxin ZHI, Changxu YANG, Xiaolei WANG, Jingang LIU. Preparation and properties of colorless and transparent polyimide-silica nanocomposite films[J]. Insulating Materials, 2023 , 56 (2) : 54 -62 . DOI: 10.16790/j.cnki.1009-9239.im.2023.02.008
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.02.008
  • Receive Date：2022-06-26
  • Online Date：2025-11-21
  • Published：2023-02-20
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History
  • Received：2022-06-26
  • Revised：2022-08-02
Funding
Affiliations
    1Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
    2Weihai Newera Kesense New Materials Co., Ltd., Weihai 264200, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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