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Papirnate vrečke iz vlaknin enoletnih rastlin
ID Štrucelj, Ana (Author), ID Možina, Klemen (Mentor) More about this mentor... This link opens in a new window

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Abstract
Za izdelavo papirnatih vrečk potrebujemo papir, ki je sposoben prenašati fizikalno-mehanske obremenitve. Čeprav je v Evropi na voljo dovolj lesa, se razvija tudi tehnologija pridobivanja celulozne vlaknine iz enoletnih rastlin. Prednosti enoletnih rastlin so predvsem lažja delignifikacija, manjša poraba vode in poraba stranskih produktov iz kmetijstva, ki bi jih sicer morali odstranjevati. Slaba stran pridobivanja celuloze iz enoletnih rastlin pa je predvsem nedostopnost skozi celo leto in s tem potrebe po skladiščenju velikih količin materiala. Primerjali smo tri vrste papirja, ki se izdelujejo v Evropi in uporabljajo za izdelavo papirnatih vrečk. Prvi vzorec je vseboval samo primarna vlakna lesne celuloze, drugi je vseboval vlakna iz trave ter lesna vlakna in tudi sekundarna vlakna, tretji vzorec pa je bil iz vlaken, pridobljenih iz odpadlega listja in sekundarnih vlaken. S primerjavo fizikalno-mehanskih lastnosti (raztržna odpornost, razpočna odpornost, utržna jakost in hitrost širjenja zvočnega impulza) smo želeli ugotoviti, ali lahko papir, narejen iz vlaken enoletnih rastlin, na področju izdelave papirnatih vrečk enakovredno nadomesti papir iz lesne celuloze. Domnevali smo, da bo papir iz lesne celuloze dosegel boljše rezultate, saj so vlakna iz lesa daljša in tako pripomorejo k večji mehanski odpornosti papirja. Hipotezo smo potrdili, saj je papir iz primarne lesne celuloze pokazal boljše rezultate pri vseh fizikalno-mehanskih lastnostih z izjemo raztržne odpornosti, kjer se je kot boljši izkazal papir iz trave in lesne celuloze. Papir, ki ni vseboval celuloze iz lesa, se je izkazal najslabše. Čeprav je izdelovanje papirja iz enoletnih rastlin dobrodošla novost, na področju papirnatih vrečk trenutno ne more nadomestiti celuloze iz dreves.

Language:Slovenian
Keywords:papirnate vrečke, celuloza, enoletne rastline, fizikalno-mehanske lastnosti
Work type:Bachelor thesis/paper
Organization:NTF - Faculty of Natural Sciences and Engineering
Year:2024
PID:20.500.12556/RUL-156410 This link opens in a new window
Publication date in RUL:24.05.2024
Views:107
Downloads:13
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Secondary language

Language:English
Title:Paper bags made from annual plant fibre
Abstract:
Durable paper is necessary for the production of paper bags. Even though there is enough wood available in Europe, the technology of acquiring cellulose fibre from annual plants is also being developed. Advantages of annual plants are easier delignification, lower water consumption and the use of farming by-products, that would otherwise have to be disposed of in some other way. Disadvantages of obtaining cellulose from annual plant fibre is mostly the plants’ availability in only certain part of the year, which necessitates large storage capabilities. We compared three types of paper that are produced in Europe and used for paper bag production. The first sample of paper contained only primary wood cellulose fibre, the second sample contained fibre from grass, wood and secondary fibre, and the third sample contained fibre from fallen leaves and secondary cellulose. Comparing physical-mechanical properties (tear strength, burst strength, tensile strength, sound wave propagation velocity) we wanted to determine whether paper made from annual plant fibre can replace the paper from wood cellulose in the production of paper bags. We presumed that the paper from wood cellulose would be more resilient than others because the fibres from wood are longer and thus improve the mechanical strength of paper. We confirmed this hypothesis since the paper from primary wood cellulose achieved better results in every measurement apart from tear strength, where paper from grass and wood fibre performed better. The paper that had no wood cellulose content performed the worst out of all three. Even though the production of paper from annual plant fibre is a welcome innovation, it unfortunately cannot replace wood cellulose paper yet.

Keywords:paper bags, cellulose, annual plants, physical-mechanical properties

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