Evidence map›Paper›PMID 42268977›Full record

ArticleScience advances2026

Oil-impregnated densified wood veneer with high electrical insulation enabled by nanosized oil channels.

Meiling Wu, Yue Xu, Qian Zhang, Alexandra Brozena, Yimin Mao, Yu Liu, Lin Xu, Soori Tejaswi, Yugang Zhang, Xinpeng Zhao and 8 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Science advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

18 authors.

Meiling WuDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.ORCID 0000-0001-9349-9602
Yue XuCenter for Electromechanics, University of Texas at Austin, Austin, TX 78758, USA.ORCID 0000-0001-8787-0153
Qian ZhangDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
Alexandra BrozenaDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.ORCID 0000-0002-5045-2123
Yimin MaoDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.ORCID 0000-0002-6240-3791
Yu LiuDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
Lin XuDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.ORCID 0000-0002-3863-0214
Soori TejaswiWalker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, USA.ORCID 0000-0003-0485-492X
Yugang ZhangCenter for Functional Nanomaterials, Brookhaven National Laboratories, Upton, NY 11973, USA.ORCID 0000-0002-7832-1475
Xinpeng ZhaoDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.ORCID 0000-0002-9522-6170
Kent Congxi ZhangDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
Kishore RamakrishnanInventWood Company, Frederick, MD 21703, USA.ORCID 0000-0002-0293-5382
Oliver WangDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
J NelsonRensselaer Polytechnic Institute, Troy, NY 12180, USA.
Vaibhav BahadurWalker Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, USA.
J Y ZhuUS Department of Agriculture (USDA) Forest Products Laboratory, Madison, WI 53726, USA.
Robert E HebnerCenter for Electromechanics, University of Texas at Austin, Austin, TX 78758, USA.ORCID 0000-0001-7798-5221
Liangbing HuDepartment of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.ORCID 0000-0002-9456-9315

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Growing energy demands and renewable integration are stressing the aging power grid infrastructure. Lignocellulosic oil-impregnated paper is widely used in power transformers but suffers from critical limitations, such as low dielectric strength, mechanical strength, and thermal conductivity, causing premature transformer failures. Here, we demonstrate a superior electrically insulating oil-impregnated paper design using the naturally anisotropic structure of densified wood veneer to achieve nanosized channels of oil that efficiently disrupt electrical breakdown pathways. The developed oil-impregnated densified wood (ODW) creates aligned cellulose fibers with 166 ± 87-nanometer oil nanochannels, achieving record dielectric strength of 105 kilovolts per millimeter. The structure also delivers a mechanical strength of up to 384 megapascals and a thermal conductivity of 0.33 watts per meter per kelvin, enabling enhanced longevity upon thermal aging tests. The ODW could replace conventional transformer insulation to enhance power transformer performance and improve lifetime. Moreover, its anisotropic oil-filled nanochannel design offers a general strategy for hybrid dielectrics in medium- and high-voltage applications.

Identifiers

PMID42268977
PMCPMC13251868

What OpenQuestion holds

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.