Izdelava bio-osnovanega embalažnega lepila iz bakterijske nanoceluloze

Vidmar, Aljana (author), Vrabič Brodnjak, Urška (mentor), Lavrič, Gregor (comentor)

V magistrskem delu smo raziskovali razvoj bio-osnovanega embalažnega lepila iz bakterijske nanoceluloze (BNC) in aloe vere kot trajnostnih alternativ sintetičnim lepilom. Zaradi izjemnih mehanskih in okolju prijaznih lastnosti imata tako BNC kot aloe vera velik potencial za uporabo v embalažni industriji. Eksperimentalni del je obsegal pripravo lepilne mešanice iz aloe vere in BNC ter primerjavo njenih mehanskih lastnosti s komercialnim lepilom Mekol z in brez BNC. Aloe vera je bila izbrana kot naravna polimerna osnova, saj njeni polisaharidi prispevajo k adheziji. Mehanske lastnosti lepilnega spoja smo testirali na gladki oziroma premazani in hrapavi oziroma nepremazani strani kartona s T-odlepilnim in strižnim testom. Rezultati so pokazali, da bio-osnovano lepilo, ki vsebuje dodatek BNC na nepremazani strani, dosega višje maksimalne strižne in odlepilne sile zaradi boljšega mehanskega sidranja delcev v vlaknasto strukturo kartona. Na premazanih straneh pa je neenakomerna porazdelitev BNC oslabila stik lepila s podlago, kar je zmanjšalo trdnost spoja. V primerjavi z Mekolom je bio-osnovano lepilo pokazalo različne vzorce obnašanja. Medtem ko je Mekol dosegel višje absolutne vrednosti maksimalnih sil, je bio-osnovana formulacija z BNC v določenih testih pokazala primerljivo mehansko stabilnost. Učinkovitost bio-osnovanega lepila ostaja močno odvisna od vrste podlage in metode nanosa, kar poudarja potrebo po nadaljnji optimizaciji formulacije. Ta primerjalna analiza prispeva k razvoju bio-osnovanih lepil v embalažni industriji in ponuja priložnosti za trajnostne alternative tradicionalnim komercialnim lepilom

• Language: Slovenian
• Keywords: bakterijska nanoceluloza (BNC), bio-osnovana lepila, embalažna industrija, trajnostni materiali, adhezijska trdnost
• Work type: Master's thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2025
• PID: 20.500.12556/RUL-168607
• Publication date in RUL: 18.04.2025

VIDMAR, Aljana, 2025, Izdelava bio-osnovanega embalažnega lepila iz bakterijske nanoceluloze [online]. Master’s thesis. [Accessed 17 May 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=168607

Secondary language

• Language: English
• Title: Production of bio-based packaging adhesive from bacterial nanocellulose

Abstract

In this master's thesis, we explored the development of a bio-based packaging adhesive from bacterial nanocellulose (BNC) and aloe vera as a sustainable alternative to synthetic adhesives. Due to its exceptional mechanical and environmental properties, BNC and aloe vera have great potential for use in the packaging industry. The experimental part involved the preparation of an adhesive mixture composed of aloe vera and BNC and the comparison of its mechanical properties with the commercial adhesive Mekol, both with and without BNC. Aloe vera was chosen as a natural polymeric base due to its polysaccharides, which contribute to adhesion. The mechanical properties of the adhesive bond were tested on both coated - smooth and uncoated-rough paper surfaces using the T-peel and shear tests. The results showed that the bio-based adhesive containing BNC achieved higher maximum shear and peel forces on the uncoated side due to better mechanical anchoring of particles within the fibrous paper structure. However, on coated surfaces, the uneven distribution of BNC weakened the adhesive-substrate interaction, reducing the bond strength. Compared to Mekol, the bio-based adhesive exhibited different behavioral patterns. While Mekol achieved higher absolute values of maximum forces, the bio-based formulation with BNC demonstrated comparable mechanical stability in certain tests. However, the effectiveness of the bio-based adhesive remains highly dependent on the type of substrate and application method, emphasizing the need for further formulation optimization. This comparative analysis contributes to the development of bio-based adhesives in the packaging industry and offers opportunities for sustainable alternatives to traditional commercial adhesives.

• Keywords: bacterial nanocellulose (BNC), bio-based adhesives, packaging industry, sustainable materials, adhesive bond strength