Polyelectrolyte gels comprising a lipophilic, cost-effective aluminate as fluorine-free absorbents for chlorinated hydrocarbons and diesel fuel.
Superabsorbent polymers comprising a lipophilic, halogen-free, and cost-effective aluminate ("altebate") anion have been synthesized. The polyelectrolytes are based on octadecyl acrylate monomers, 0.8-1 mol % ethylene dimethacrylate cross-linker, and 5 mol % N-3-acroyloxypropyl trialkylammonium altebate. At 30 °C, swelling degrees of 70 (chlorobenzene), 102 (CHCl3), 130 (THF), 163 (ClCH2CH2Cl), 171 (dichlorobenzene), and 208 (CH2Cl2) have been determined. The polyelectrolyte absorbs reversibly diesel fuel with a swelling degree of 34, even in the presence of water. Swelling times and critical swelling temperatures have also been determined. The challenges for the development of oil absorbents are discussed.
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany.
Michael
M
Wrede
Viktoria
V
Ganza
Janina
J
Bucher
Bernd F
BF
Straub
D041342:Absorbent Pads; D000042:Absorption; D003362:Cost-Benefit Analysis; D004573:Electrolytes / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000191:economics / Q000295:instrumentation*; D005461:Fluorine; D005742:Gasoline; D005782:Gels / Q000138:chemical synthesis* / Q000737:chemistry*; D006843:Hydrocarbons, Chlorinated / Q000302:isolation & purification*; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D013696:Temperature; D014867:Water / Q000737:chemistry
D004573:Electrolytes; D005742:Gasoline; D005782:Gels; D006843:Hydrocarbons, Chlorinated; D011108:Polymers; D014867:Water; D005461:Fluorine