Effect of doped nano-SiO2, Al2O3, and polyhedral oligomeric sesquisiloxane on the thermodynamic properties of cellulose

Ding, Can; Liu, Luotian; Feng, Lu

doi:10.1063/5.0132902

Cited by 3 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the development of power system, the requirements of service life of oil-paper insulation system are getting stricter. [1][2][3] The insulation system in a transformer usually consists of two parts, the insulating oil and the insulation paper, both of which work together to guarantee the stable operation of the transformer. [4] Insulation paper can be divided into meta aramid (Nomex) insulation paper, Kraft paper, and cellulose insulation paper.…”

Section: Introductionmentioning

confidence: 99%

Ladderlike Polyphenylsesquioxane‐Doped Cellulose Insulation Paper with Upgraded Mechanical Strength

Zeng

Wang

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Ladderlike Polyphenylsesquioxane‐Doped Cellulose Insulation Paper with Upgraded Mechanical Strength

Zeng

Wang

et al. 2023

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

“…A large number of studies show that the major method to improve the performance of the cellulose insulating paper is to dope heat stabilisers or nanoparticles [7][8][9], which can strengthen the hydrogen bond network inside the insulating paper, and can show good stability in the face of high temperature environment, thus delaying the ageing rate of the insulating paper [10,11]. However, the modification with the problem of agglomeration of nanoparticles will cause uneven performance of the insulating paper.…”

Section: Introductionmentioning

confidence: 99%

A new type of lipophilic hydrophobic self‐repairing cellulose insulating paper developed with ST‐110/FAS/PTFE ternary system as coating substrate

Zeng,

Qin,

Wang

et al. 2023

High Voltage

View full text Add to dashboard Cite

The moisture generated by the ageing of the oil‐paper insulating system can easily lead to the deterioration of the performance of the insulating paper. In order to alleviate the impact of moisture on the performance of the insulating paper, we developed a kind of lipophilic hydrophobic self‐repairing cellulose insulating paper (new insulating paper) based on the ternary system of polytetrafluoroethylene, fluorocarbon surfactant and fluorinated alkyl silane, and accelerated thermal ageing test for 45 days at 130°C was carried out. The experimental results show that the new insulating paper with excellent lipophilic property can realise hydrophobic self‐repairing through heat treatment after physical damage. The tensile strength and elongation at break of the new insulating paper increased by 5%–8% and 6.25%–27% respectively compared with the original cellulose insulating paper. At the end of ageing, the relative dielectric constant and dielectric loss factor of new insulating paper are 10.4% and 9.9% lower than that of the original cellulose insulating paper, while the breakdown voltage is 6.8% higher. The acid and moisture content produced during the ageing process of the insulating oil impregnated with new insulating paper are also less, indicating that the coating can delay the ageing of the insulating paper.

show abstract

Molecular simulation of different types of polysilsesquioxane doped cellulose insulating paper: A guide for special cellulose insulating paper

Zeng,

Tan,

Deng

et al. 2024

Journal of Applied Physics

View full text Add to dashboard Cite

To develop special insulating paper is of great significance to promote the service life of transformers. Using molecular simulation to guide the development of special insulating paper can greatly reduce the trial-and-error rate and waste of resources in traditional experiments. The effect of different types of polysilsesquioxane (POSS) on cellulose insulating paper was investigated by using molecular simulation. This paper investigated the thermal stability and mechanical properties and electrical characteristics of caged POSS, semi-caged POSS, and ladder-like POSS doped cellulose insulating paper. The results show that POSS with all types can enhance the performance of cellulose insulating paper, and ladder-like POSS possess the best modification effect. The glass transition temperature was increased by 58 K, and the bulk modulus, shear modulus, and elastic modulus of cellulose insulating paper doped with ladder-like POSS can improve up to 27.07%, 45.67%, and 41.28%, respectively. Meanwhile, the dielectric properties of ladder-like POSS modified insulating paper are also significantly improved. The findings of this paper propose a method for the preparation of ladder-like POSS modified insulating paper, which provides theoretical guidance for the experimental preparation of special insulating paper.

show abstract

Effect of doped nano-SiO2, Al2O3, and polyhedral oligomeric sesquisiloxane on the thermodynamic properties of cellulose

Cited by 3 publications

References 14 publications

Ladderlike Polyphenylsesquioxane‐Doped Cellulose Insulation Paper with Upgraded Mechanical Strength

Ladderlike Polyphenylsesquioxane‐Doped Cellulose Insulation Paper with Upgraded Mechanical Strength

A new type of lipophilic hydrophobic self‐repairing cellulose insulating paper developed with ST‐110/FAS/PTFE ternary system as coating substrate

Molecular simulation of different types of polysilsesquioxane doped cellulose insulating paper: A guide for special cellulose insulating paper

Contact Info

Product

Resources

About