Preparation of Cellulose Insulating Paper with Low Dielectric Constant by BTCA Esterification Crosslinking

Yang, Mujie; Yang, Lijun; Hou, Wei; Zou, Tiantian; Huang, Youyu; Liao, Ruijin

doi:10.1002/mame.202000063

Cited by 28 publications

(17 citation statements)

References 48 publications

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“…When treated with 10 g/L polycarboxylic acid, the dielectric constant and dielectric loss are slightly higher than 6 g/L, which is due to the addition of polar carboxyl groups on the surface of cellulose treated with 10g/L that are not involved in crosslinking (Figure 3e, f) (Mo et al 2020). Meanwhile, molecular dynamics simulations show that the variation trend of steering polarization before and after cross-linking is consistent with the experimental results.…”

Section: Modified Group Type and Charge Interactionsupporting

confidence: 77%

“…In contrast, replacing hydroxyl groups on cellulose molecules with -OAPS, -Na, -PPh3Me groups reduces the dielectric constant and dielectric loss. See Figure 3 (modified cellulose or nanocellulose with εr < 6), we summarize some examples of reducing the dielectric properties of cellulose by changing the hydroxyl group on cellulose (Natarajan et al 2017;Bonardd et al 2018b;Mo et al 2019Mo et al , 2020Dacrory et al 2021a). After acetylation, polycarboxylic acid (1,2,3,4-butanetetracarboxylic)…”

Section: Modified Group Type and Charge Interactionmentioning

confidence: 99%

“…Figure 4. Presentative functional groups on cellulose/nanocellulose aim to change the dielectric properties(Natarajan et al 2017;Bonardd et al 2018b;Mo et al 2019Mo et al , 2020Dacrory et al 2021a). …”

mentioning

confidence: 99%

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Dielectric Properties of Cellulose and Nanocellulose-Based Materials

Luo

Shen

Zhou

et al. 2022

Preprint

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As a biodegradable green dielectric material, cellulose has been used in wearable electronic devices, sensors, film capacitors, and other electronic devices. Cellulose-based dielectric has the advantages of renewable, non-toxic, flexible, and strong mechanical properties, so it of is great significance to study the dielectric properties of cellulose. In this paper, we summarized the factors influencing the dielectric properties of cellulose-based dielectric and the ways to change the dielectric properties, mainly explored the methods to improve the dielectric constant of nanocellulose-based dielectric materials. This review summarizes the current state-of-art progress of new dielectric materials, the application of cellulose in electronic devices, the development of green energy storage materials and etc.

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Section: Modified Group Type and Charge Interactionsupporting

confidence: 77%

Section: Modified Group Type and Charge Interactionmentioning

confidence: 99%

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Dielectric Properties of Cellulose and Nanocellulose-Based Materials

Luo

Shen

Zhou

et al. 2022

Preprint

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“…The composite material's mechanical properties make it suitable for industrial use 22 . As demonstrated in Table 4, the tensile strength of pure PP is 40.322 MPa; when filled with 1% modified CNC, it increases to 43.633 MPa.…”

Section: Resultsmentioning

confidence: 99%

“…The composite material's mechanical properties make it suitable for industrial use. 22 As demonstrated in Table 4, the tensile strength of pure PP is 40.322 MPa; when filled with 1% modified CNC, it increases to 43.633 MPa. The tensile strength and tensile modulus of the esterified CNC/PP composites rose dramatically as the CNC content was increased (Figure 7).…”

Section: Mechanical Characterizationmentioning

confidence: 93%

Preparation of BTCA‐esterified cellulose nanocrystals and effects on mechanical and thermal properties of polypropylene composites

Zhao

Wei

et al. 2022

J of Applied Polymer Sci

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In this study, cross‐linked cellulose nanocrystals (CNC) were esterified using 1,2,3,4‐tricarboxylic acid (BTCA) to decrease the hydroxyl content of the nanocellulose, control its hydrophilic/hydrophobic degree, and improve its compatibility with the polypropylene (PP) matrix. The mechanical and physical properties of nanocellulose‐reinforced polypropylene composites were investigated after they were manufactured via melt extrusion using a twin‐screw extruder. FTIR and XPS analysis revealed that the nanocellulose chain was successfully esterified utilizing BTCA. The results from SEM and Mapping demonstrated that the nanocellulose was spread equally throughout the matrix. By characterizing the 5 wt% CNC/PP composite material with DMA and tensile testing devices, the elongation at break decreases, the rigidity increases, and the tensile strength increases to 50.5 MPa, a 25.5% increase over pure polypropylene. Simultaneously, DSC data demonstrated that nanocellulose provided a heterogeneous nucleation site, expedited polypropylene crystallization, and was advantageous for polypropylene processing. According to the results of TG/DTG, esterified CNC/PP composites containing 5% CNC had the highest thermal resistance, with Tonset and Tmax increasing by up to 66 and 11.6°C, respectively, when compared to pure PP. Following a thorough investigation and evaluation of the samples' mechanical and thermal properties, it was determined that BTCA esterification cross‐linking is an effective method for surface modification of nanocellulose, as it increases the compatibility of nanocellulose with polypropylene, improves the mechanical properties of polypropylene, and thus expands its application range.

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Ladderlike Polyphenylsesquioxane‐Doped Cellulose Insulation Paper with Upgraded Mechanical Strength

Zeng

Wang

et al. 2023

Adv Eng Mater

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Ladderlike polyphenylsesquioxane (L‐PPSQ) with special planar ladder structure is significant to upgrade the mechanical strength of cellulose insulation paper. In this study, the effect of different content of L‐PPSQ on mechanical properties and dielectric properties of cellulose is first investigated by molecular simulation, and then insulation paper doped with L‐PPSQ is prepared for experimental verification. It is indicated in the simulation results that the elastic modulus, bulk modulus, and shear modulus of the cellulose are enhanced up to 36.82%, 27.96%, and 41.80%, respectively, when L‐PPSQ is added at 3 wt%, and the cellulose model with 3 wt% L‐PPSQ possesses the lowest dielectric constant. The reason is that L‐PPSQ can enhance the hydrogen bonding network of cellulose, weaken the degree of molecular chain motion, and strengthen the strength of molecular chains, which in turn manifests as the enhancement of mechanical strength. It is shown in the experimental results that the tensile strength and elongation at break of the composite insulation paper can be enhanced by 16.7% and 35.09% when the L‐PPSQ content is 3 wt%, which is consistent with the simulation results. The short‐term aging test shows that L‐PPSQ can also upgrade the mechanical strength of the insulation paper at high temperatures.

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Preparation of Cellulose Insulating Paper with Low Dielectric Constant by BTCA Esterification Crosslinking

Cited by 28 publications

References 48 publications

Dielectric Properties of Cellulose and Nanocellulose-Based Materials

Dielectric Properties of Cellulose and Nanocellulose-Based Materials

Preparation of BTCA‐esterified cellulose nanocrystals and effects on mechanical and thermal properties of polypropylene composites

Ladderlike Polyphenylsesquioxane‐Doped Cellulose Insulation Paper with Upgraded Mechanical Strength

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