ERIC Number: EJ1138771
Record Type: Journal
Publication Date: 2017-Apr
Abstractor: As Provided
Reference Count: 15
Using Greener Gels to Explore Rheology
Garrett, Brendan; Matharu, Avtar S.; Hurst, Glenn A.
Journal of Chemical Education, v94 n4 p500-504 Apr 2017
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.
Descriptors: Laboratory Experiments, Science Experiments, Science Laboratories, Scientific Concepts, Chemistry, College Science, Undergraduate Study, Hands on Science, Conservation (Environment), Science Instruction
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: firstname.lastname@example.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education; Postsecondary Education
Authoring Institution: N/A