Using Greener Gels To Explore Rheology
Using Greener Gels To Explore Rheology
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DOI：
10.1021/acs.jchemed.6b00584
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发表时间：
2017-04-01
影响因子：
3
通讯作者：
Hurst, Glenn A.
中科院分区：
文献类型：
--
作者：
Garrett, Brendan;Matharu, Avtar S.;Hurst, Glenn A.
以绿色钙交联海藻酸盐凝胶代替传统的硼砂交联聚乙烯醇凝胶，进行了流变学性质的实验研究。由于维生素C被怀疑会损害生育能力和未出生的孩子，因此有必要寻找一种安全的绿色替代品。用毛细管粘度计研究了海藻酸钠溶液的流变特性随温度的变化。使用旋转粘度计跟踪凝胶化和去凝胶化过程。还通过使用旋转粘度计测定作为主轴速度的函数的粘度来举例说明非牛顿剪切稀化性质。学生在自然科学学位内从第一年到第二年的本科化学课程过渡成功地进行了这个实验室实验。
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.