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Thermo-Responsive Behaviour of Cellulosic Materials
Year: 2014
Type of publication: článek v odborném periodiku
Name of source: Cellulose Chemistry and Technology
Publisher name: Editura Academiei Romane
Place: Bukurešť
Page from-to: 225-236
Titles:
Language Name Abstract Keywords
cze Termorosponzivní chvání celulózových materiálů V práci bylo zjištěno, během mletí buničin ve vodném prostředí, že charakteristický pokles odvodnitelnosti buničiny se zvyšující se energií dodanou do procesu mletí se nečekaně zvyšuje když teplota mleté suspenze přesáhne °C. Odvodňovací schopnost buničiny se zlepšuje nejen při vyšších teplotách než °C, ale také má tentedci být vyšší, než je způsobeno pouhým snížením viskozity vody. termorosponzivní hydratované systémy; hydrogel; teplota fázového přechodu; mletí; odvodňovací schopnost
eng Thermo-Responsive Behaviour of Cellulosic Materials Thermo-responsive hydrated macro-, micro- and submicro-reticular systems, particularly polymers forming hydrogels or similar networks, have attracted extensive interest as they comprise biomaterials, smart or intelligent materials. Phase transition temperature (low or upper critical solution temperature) of the thermo-responsive hydrated reticular systems, which exhibit a unique hydration-dehydration change, is a typical characteristic. The macro-reticular systems with weak bonding are represented by papermaking pulp slurries composed of cellulosic or ligno-cellulosic fibres. During wet pulp beating, it was found that the characteristic decrease of the pulp drainability with increasing the input of beating energy abruptly enhanced if the temperature of the beating pulp slurry was higher than 40 °C. Similar observations have been made during pulp slurry drainage at higher temperatures. The drainability of pulp slurries not only improves at temperatures higher than 40 °C, but also it tends to be higher than that obtained when decreasing water viscosity only. thermo-responsive hydrated system; hydrogel; phase transition temperature; beating; drainability

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