Design and manufacture of electromagnetic absorber composed of boric acid-incorporated wastepaper composites
← Research streamAn electromagnetic absorber based on wastepaper with boric acid (5, 10, 20, 30 wt%) was developed and compared with 30 wt% Cu and 30 wt% Al additives. Newsprint-based boards showed better absorption effectiveness than office paper and cardboard, with absorpti…
Study snapshot
Abstract
Design and manufacture of electromagnetic absorber composed of boric acid-incorporated wastepaper composites ALİ İHSAN KAYA, AHMET ÇİFCİ, FİLİZ KIRDIOĞULLARI, MESUD KAHRİMAN, OSMAN ÇEREZCI. Design and manufacture of electromagnetic absorber composed of boric acid-incorporated wastepaper composites. Turk J Elec Eng & Comp Sci. 2022. 30: 839 – 854. doi:10.3906/elk-2106-21. Abstract With the effect of technological advances, the use of electrical and electronic devices has increased dramatically in recent years. Wireless technologies and related applications are mostly preferred for the communication of these devices with each other. Thus, people are easily exposed to electromagnetic waves in daily life. The extensive global use of these devices raises the question of their possible biological effects on human health. Also, electromagnetic waves influence the functioning of a nearby device. In this study, an electromagnetic absorber based on boric acid (5, 10, 20, and 30 wt%) added wastepaper was developed. Copper (Cu) and aluminum (Al) were also used as mineral additives for comparison. Three different kinds of wastepaper namely, office paper, newsprint, and cardboard paper were selected for the experimental study. The effect of varying boric acid contents on the electromagnetic absorption of the boards manufactured was evaluated and compared to Cu (30 wt%) and Al (30 wt%) added boards. The results show that newsprint has better absorption effectiveness than office and cardboard paper and absorption up to 40 dB was achieved. The absorption effectiveness of Al, Cu, and boric acid added boards was achieved at approximately 40, 30, and 20 dB, respectively. As a result, the electromagnetic absorption effectiveness of boric acid added the board is acceptable levels. Also, apart from the use of boric acid as a powder, it has been determined that the application of the surface as a layer is effective in absorption. Open access paper: journals.tubitak.gov.tr
AI evidence extraction
Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.
Main findings
An electromagnetic absorber based on wastepaper with boric acid (5, 10, 20, 30 wt%) was developed and compared with 30 wt% Cu and 30 wt% Al additives. Newsprint-based boards showed better absorption effectiveness than office paper and cardboard, with absorption up to 40 dB reported; absorption effectiveness was approximately 40 dB for Al-added boards, 30 dB for Cu-added boards, and 20 dB for boric-acid-added boards. Applying boric acid as a surface layer (in addition to powder use) was reported to be effective for absorption.
Outcomes measured
- Electromagnetic absorption effectiveness (dB) of boric acid-incorporated wastepaper composite boards
- Comparison of absorption effectiveness across wastepaper types (office paper, newsprint, cardboard)
- Comparison of absorption effectiveness for mineral additives (boric acid vs Cu vs Al)
- Effect of boric acid application method (powder vs surface layer) on absorption
Limitations
- No frequency range or test standard for absorption measurements is stated in the abstract.
- No details on experimental setup, sample dimensions, or number of samples/replicates are provided in the abstract.
- No statistical analysis or uncertainty measures are described in the abstract.
View raw extracted JSON
{
"study_type": "engineering",
"exposure": {
"band": null,
"source": null,
"frequency_mhz": null,
"sar_wkg": null,
"duration": null
},
"population": null,
"sample_size": null,
"outcomes": [
"Electromagnetic absorption effectiveness (dB) of boric acid-incorporated wastepaper composite boards",
"Comparison of absorption effectiveness across wastepaper types (office paper, newsprint, cardboard)",
"Comparison of absorption effectiveness for mineral additives (boric acid vs Cu vs Al)",
"Effect of boric acid application method (powder vs surface layer) on absorption"
],
"main_findings": "An electromagnetic absorber based on wastepaper with boric acid (5, 10, 20, 30 wt%) was developed and compared with 30 wt% Cu and 30 wt% Al additives. Newsprint-based boards showed better absorption effectiveness than office paper and cardboard, with absorption up to 40 dB reported; absorption effectiveness was approximately 40 dB for Al-added boards, 30 dB for Cu-added boards, and 20 dB for boric-acid-added boards. Applying boric acid as a surface layer (in addition to powder use) was reported to be effective for absorption.",
"effect_direction": "unclear",
"limitations": [
"No frequency range or test standard for absorption measurements is stated in the abstract.",
"No details on experimental setup, sample dimensions, or number of samples/replicates are provided in the abstract.",
"No statistical analysis or uncertainty measures are described in the abstract."
],
"evidence_strength": "insufficient",
"confidence": 0.74,
"peer_reviewed_likely": "unknown",
"keywords": [
"electromagnetic absorber",
"wastepaper composites",
"boric acid",
"newsprint",
"office paper",
"cardboard",
"copper additive",
"aluminum additive",
"absorption effectiveness",
"dB"
],
"suggested_hubs": []
}AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.
Identifiers and source
DOI: 10.3906/elk-2106-21
PubMed: Not supplied