Using Greener Gels to Explore Rheology

Autor/inn/en	Garrett, Brendan; Matharu, Avtar S.; Hurst, Glenn A.
Titel	Using Greener Gels to Explore Rheology
Quelle	In: Journal of Chemical Education, 94 (2017) 4, S.500-504 (5 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Hurst, Glenn A.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/acs.jchemed.6b00584
Schlagwörter	Laboratory Experiments; Science Experiments; Science Laboratories; Scientific Concepts; Chemistry; College Science; Undergraduate Study; Hands on Science; Conservation (Environment); Science Instruction + Suchen Sie Ihr Suchwort? Laboratory work; Laborarbeit; Chemie; Grundstudium; Conservation; Environment; Konservierung; Bewahung; Umwelt; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht
Abstract	A laboratory experiment was developed to investigate the rheological properties of a green calcium-cross-linked alginate gel as an alternative to the traditional borax-cross-linked poly(vinyl alcohol) gel. As borax is suspected of damaging fertility and the unborn child, a safe, green alternative is necessary. The rheological properties of a sodium alginate solution were examined as a function of temperature using capillary viscometry. Gelation and degelation processes were followed using rotational viscometry. The non-Newtonian shear-thinning properties were also exemplified by determining the viscosity as a function of spindle speed using the rotational viscometer. Students making the transition from a first- to second-year undergraduate chemistry program within a natural sciences degree have successfully conducted this laboratory experiment. (As Provided).
Anmerkungen	Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01