Nitrogen-Doped Carbon Quantum Dots-Gellan Gum As An Innovative Self-Healable Hydrogel Composite

Year 2022, Volume: 5 Issue: 3, 581 - 590, 15.12.2022

Serbülent Türk , Mahmut Özacar

https://doi.org/10.38001/ijlsb.1143572

Abstract

Tension sensors can be widely applied to detect body movements and monitor physiological signals. Hydrogels with conductive properties draw attention among the studies in this field. However, their application is limited because hydrogels can be easily damaged during use. In this study, a self-healing conductive hydrogel was produced by adding nitrogen-doped carbon quantum dots (NCQDs) to gellan gum (GG) polymer. The self-healing property of the hydrogen bonds in the prepared polymeric matrix network to a certain extent and the conductivity were supported by the addition of NCQDs. The electrical recovery process of the hydrogel in the 1, 2, and 3 cutting/healing cycles was illustrated by a visually designed LED bulb serial circuit. As a result of connecting the obtained 3D hydrogel to a real-time resistance change measurement system, the resistance changes in the cutting/healing cycles were monitored. The duration of the total cut-healing process, including cut and contact time, was 2.12 s. In addition, a free-standing gel bridge was formed after joining the two cut pieces of cylindrical hydrogels. Due to the resulting hydrogel composite properties, it has promising potential in various applications such as personal health diagnosis, human activity monitoring, and human-motion sensors.

Keywords

Self-healable, hydrogel composite, conductivity

Supporting Institution

Sakarya University

Project Number

2019-6-23-223

Thanks

This work was supported by the Scientific Research Projects Commission of Sakarya University (Project number: 2019-6-23-223).

YENİLİKÇİ KENDİNDEN İYİLEŞEN HİDROJEL KOMPOZİT OLARAK AZOT KATKILI KARBON KUANTUM DOTS-GELLAN GUM

Abstract

Gerginlik sensörleri, vücut hareketlerini algılamak ve fizyolojik sinyalleri izlemek için yaygın olarak uygulanabilir. Bu alandaki çalışmalar arasında iletken özelliklere sahip hidrojeller dikkat çekmektedir. Ancak hidrojellerin kullanım sırasında kolayca zarar görmeleri nedeniyle uygulamaları sınırlıdır. Bu çalışmada, jellan zamkı (GG) polimerine nitrojen katkılı karbon kuantum noktaları (NCQD'ler) eklenerek kendi kendini iyileştiren iletken bir hidrojel üretildi. Hazırlanan polimerik matris ağındaki hidrojen bağlarının kendi kendini iyileştirme özelliği bir dereceye kadar ve iletkenlik NCQD'lerin eklenmesiyle desteklenmiştir. Hidrojelin 1, 2 ve 3 kesme/iyileştirme döngüsündeki elektriksel geri kazanım süreci, görsel olarak tasarlanmış bir LED ampul seri devresi ile gösterilmiştir. Elde edilen 3 boyutlu hidrojelin gerçek zamanlı direnç değişimi ölçüm sistemine bağlanması sonucunda kesme/iyileştirme döngülerindeki direnç değişimleri izlendi. Kesim ve temas süresi dahil toplam kesik-iyileşme sürecinin süresi 2.12 s idi. Ek olarak, iki kesilmiş silindirik hidrojel parçası birleştirildikten sonra serbest duran bir jel köprüsü oluşturulmuştur. Ortaya çıkan hidrojel kompozit özellikleri nedeniyle, kişisel sağlık teşhisi, insan aktivitesinin izlenmesi ve insan hareket sensörleri gibi çeşitli uygulamalarda umut verici bir potansiyele sahiptir.

Keywords

Kendi kendini iyileştirebilir, hidrojel kompozit, iletkenlik

Project Number

2019-6-23-223

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