Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Influence of Pulping Process and Energy Consumption on Properties of Nanofibrillated Lignocellulose (NFLC) Films Isolated from Wheat Straw ; Utjecaj procesa proizvodnje pulpe i potrošnje energije na svojstva filmova na bazi nanofibrilirane lignoceluloze (NFLC) izolirane iz pšenične slame
The present research has primarily focused on the production of nanofibrillated lignocellulose (NFLC) instead of nanofibrillated cellulose (NFC), which could be produced with less energy and is expected to have similar uses as NFC, especially in the sectors where the transparency is not important. Furthermore, the effect of energy consumption needed for NFLC production and also the influence of pulping methods on the produced NFLC properties has been surveyed. Through mechanical refining and different passes in microfluidizer, the results showed the average diameter of NFLC declined from around 19000 nm to 36 nm. Soda-NFLC films had higher calliper and lower roughness, compared to those of MEA at given energy consumption in refiner and microfluidizer. For both kinds of pulps, the optimum level of energy consumption to reach the best tensile index of NFLC films was 258 kWh/t, with three passes through microfluidizer. More increase in the number of passes and pressure only resulted in increasing of energy consumption without any positive effect on improving the tensile index. The maximum tensile indices of NFLC films obtained from soda and MEA pulping processes were 113.5 and 119.86 N·m/g, respectively. The burst index of 8.5 kP·m2/g and the energy consumption of 458 kWh/t were obtained for five passes through microfluidizer. With the increase of the number of passes of soda and MEA samples through microfluidizer, the opacity decreased but transparency increased. ; Ovo je istraživanje usmjereno na proizvodnju nanofibrilirane lignoceluloze (NFLC) umjesto nanofibrilirane celuloze (NFC). Ta bi se celuloza (NFLC) mogla proizvesti s manje energije i moglo bi se očekivati da će imati sličnu uporabu kao NFC, osobito u područjima gdje transparentnost nije osobito važna. Ispitan je i učinak potrošnje energije potrebne za proizvodnju NFLC-a, kao i utjecaj metode proizvodnje pulpe na svojstva proizvedene lignoceluloze. Rezultati istraživanja pokazali su da je mehaničkim oplemenjivanjem i uz različit broj prolazaka kroz mikrofluidizator prosječni promjer NFLC-a pao s oko 19 000 nm na 36 nm. NFLC filmovi od natronske pulpe pri određenoj su potrošnji energije u rafinatoru i mikrofluidizatoru imali veću debljinu i manju hrapavost u usporedbi s onima od MEA pulpe. Optimalna razina potrošnje energije za postizanje najboljega vlačnog indeksa NFLC filmova za obje vrste pulpe bila je 258 kWh/t, uz tri prolaska kroz mikrofluidizator. Povećanje broja prolazaka i tlaka rezultiralo je samo povećanjem potrošnje energije bez ikakva pozitivnog učinka na poboljšanje indeksa kidanja. Maksimalni indeksi kidanja NFLC filmova od pulpe dobivene natronskim i MEA postupkom bili su 113,5 odnosno 119,86 N·m/g. Indeks prskanja od 8,5 kP·m2/g i potrošnja energije od 458 kWh/t dobiveni su prolaskom pulpe kroz mikrofluidizator pet puta. S porastom broja prolazaka uzoraka natronske i MEA pulpe kroz mikrofluidizator smanjila se neprozirnost, ali se povećala transparentnost uzoraka.
The Influence of Pulping Process and Energy Consumption on Properties of Nanofibrillated Lignocellulose (NFLC) Films Isolated from Wheat Straw ; Utjecaj procesa proizvodnje pulpe i potrošnje energije na svojstva filmova na bazi nanofibrilirane lignoceluloze (NFLC) izolirane iz pšenične slame
The present research has primarily focused on the production of nanofibrillated lignocellulose (NFLC) instead of nanofibrillated cellulose (NFC), which could be produced with less energy and is expected to have similar uses as NFC, especially in the sectors where the transparency is not important. Furthermore, the effect of energy consumption needed for NFLC production and also the influence of pulping methods on the produced NFLC properties has been surveyed. Through mechanical refining and different passes in microfluidizer, the results showed the average diameter of NFLC declined from around 19000 nm to 36 nm. Soda-NFLC films had higher calliper and lower roughness, compared to those of MEA at given energy consumption in refiner and microfluidizer. For both kinds of pulps, the optimum level of energy consumption to reach the best tensile index of NFLC films was 258 kWh/t, with three passes through microfluidizer. More increase in the number of passes and pressure only resulted in increasing of energy consumption without any positive effect on improving the tensile index. The maximum tensile indices of NFLC films obtained from soda and MEA pulping processes were 113.5 and 119.86 N·m/g, respectively. The burst index of 8.5 kP·m2/g and the energy consumption of 458 kWh/t were obtained for five passes through microfluidizer. With the increase of the number of passes of soda and MEA samples through microfluidizer, the opacity decreased but transparency increased. ; Ovo je istraživanje usmjereno na proizvodnju nanofibrilirane lignoceluloze (NFLC) umjesto nanofibrilirane celuloze (NFC). Ta bi se celuloza (NFLC) mogla proizvesti s manje energije i moglo bi se očekivati da će imati sličnu uporabu kao NFC, osobito u područjima gdje transparentnost nije osobito važna. Ispitan je i učinak potrošnje energije potrebne za proizvodnju NFLC-a, kao i utjecaj metode proizvodnje pulpe na svojstva proizvedene lignoceluloze. Rezultati istraživanja pokazali su da je mehaničkim oplemenjivanjem i uz različit broj prolazaka kroz mikrofluidizator prosječni promjer NFLC-a pao s oko 19 000 nm na 36 nm. NFLC filmovi od natronske pulpe pri određenoj su potrošnji energije u rafinatoru i mikrofluidizatoru imali veću debljinu i manju hrapavost u usporedbi s onima od MEA pulpe. Optimalna razina potrošnje energije za postizanje najboljega vlačnog indeksa NFLC filmova za obje vrste pulpe bila je 258 kWh/t, uz tri prolaska kroz mikrofluidizator. Povećanje broja prolazaka i tlaka rezultiralo je samo povećanjem potrošnje energije bez ikakva pozitivnog učinka na poboljšanje indeksa kidanja. Maksimalni indeksi kidanja NFLC filmova od pulpe dobivene natronskim i MEA postupkom bili su 113,5 odnosno 119,86 N·m/g. Indeks prskanja od 8,5 kP·m2/g i potrošnja energije od 458 kWh/t dobiveni su prolaskom pulpe kroz mikrofluidizator pet puta. S porastom broja prolazaka uzoraka natronske i MEA pulpe kroz mikrofluidizator smanjila se neprozirnost, ali se povećala transparentnost uzoraka.
The Influence of Pulping Process and Energy Consumption on Properties of Nanofibrillated Lignocellulose (NFLC) Films Isolated from Wheat Straw ; Utjecaj procesa proizvodnje pulpe i potrošnje energije na svojstva filmova na bazi nanofibrilirane lignoceluloze (NFLC) izolirane iz pšenične slame
Moezzipour, Bita (Autor:in) / Hedjazi, Sahab (Autor:in) / Yousefi, Hossein (Autor:in) / Ahmadi, Mohammad (Autor:in)
01.01.2021
Drvna industrija ; ISSN 0012-6772 (Print) ; ISSN 1847-1153 (Online) ; Volume 72 ; Issue 4
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
DDC:
690
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