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Von Waldbränden, Polymeren
und der
Chemie in Babywindeln
Hans Eck 24. April 2013 RFDZ Chemie
Was sind Superabsorber?
Ein Superabsorber besteht aus einem Netzwerk von Polymerketten (SAP=superabsorbierendes
Polymer). Der Hauptbestandteil ist die Acrylsäure (=Propansäure).
Natriumacrylat
Grafik: RFDZ Chemie Pia Jaritz
Grafik: RFDZ Chemie Pia Jaritz
Quelle: www.basf.com
Polyacrylsäure in gestreckter Form (links) und in
Knäuelform (rechts)
Welche Flüssigkeiten werden
aufgenommen?
Stoff Menge an aufgenommener Flüssigkeit pro 1 g
Superabsorber
Wasser H2O 130 ml
Ethanol CH3 – CH2 - OH 0 ml
Salzsäure (konz.) HCl 4 ml
Natronlauge (1mol/l) NaOH 13 ml
Welche Flüssigkeiten werden
aufgenommen?
Warum wird Wasser gut aufgenommen und Ethanol nicht?
Beides sind polare Stoffe, die in der Lage sind,
Wasserstoffbrücken zu bilden.
Aber: Ethanol ist im Verhältnis zu Wasser ein größeres
Molekül.
Die Aufnahme von Flüssigkeiten ist also nicht nur von der
Polarität des Stoffes, sondern auch von der Größe des
Moleküls abhängig.
Schritte der Superabsorber-Produktion
Anwendungen der Superabsorber
Eigenschaften
Hohe Verdickungskapazität
Quellvermögen
Feuchtigkeitsmanagement
Der Aufbau einer Windel
Eine Windel besteht aus vielen Komponenten
Superabsorber
die wichtigsten
Materialien sind:
Polypropylenflies
Zellstoff
Superabsorber
Ein kurzer Abriss aus der Geschichte der
Windel
Als Erfinderin der Wegwerfwindel gilt die
Amerikanerin Marion Donovan.
1961 Victor Mills, ähnliche Entwicklung der
Wegwerfwindel unter der Procter & Gamble-Marke
Pampers
Ein Kind benötigt im Schnitt 4600 Windeln
Spezielle Anwendungsgebiete
Bauchemie
Verdicker in Mörteln
Wasserspeicher
Spezielle Anwendungsgebiete
Feuchtigkeitsmanagement
Lebensmittelverpackungen
Überseecontainer
Wundauflagen
Spezielle Anwendungsgebiete
Landwirtschaft
Wasserspeicher
http://www.freudenberger.net/seed-sorb.asp
Spezielle Anwendungsgebiete
Kabelummantelung
Leckabdichtung
Spezielle Anwendungsgebiete
Brandbekämpfung
LINKS
http://www.superabsorber.de/sites/dc/Downloadcenter/Evonik/Product/Sup
erabsorber/de/Schulbroschuere_FAVOR.pdf
http://www.chempage.de/versuche/OC/OC%20007/OC%20007.htm
http://www.basf.com/group/corporate/de/function/conversions:/publishdow
nload/content/about-
basf/worldwide/europe/Ludwigshafen/Education/Unterrichtsmaterialien/dat
a/mittelstufe/Kunststoff.pdf
http://www.jahr-der-chemie-
stuttgart.de/schuelerwettbewerb/a4/superabsorber.pdf
Volksschule Krakaudorf

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