Evaluation of the structural morphology of starch-graft-poly(acrylic acid) on its scale-inhibition efficiency

Water Research
Wei YuHu Yang

Abstract

The development of phosphorus-free and biodegradable scale inhibitors has been paid considerable attention. Two series of starch-graft-poly(acrylic acid) (St-g-PAA) samples with different grafting ratios and grafted-chain distributions, that is, the number and length of grafted PAA chains on the starch backbone, were designed and prepared in this study. Fourier transform infrared and 1H nuclear magnetic resonance spectra were used to further characterize the molecular structures of the St-g-PAAs. In addition to dose, the effects of the structural morphologies of St-g-PAA, namely, grafting ratio and grafted-chain distribution, on the scale-inhibition performance against calcium carbonate were investigated systematically. Structural morphology significantly influenced the scale-inhibition performance of St-g-PAA. St-g-PAA with relatively low grafting ratio (≤97%) displayed better scale-inhibition effect than samples with similar grafted-chain distributions. Meanwhile, under the similar grafting ratios, samples with higher number of branched chains with shorter grafted chains displayed better antiscaling performance. Thus, higher scale-inhibition rate and lower corresponding optimal dose were obtained. Different scale-inhibition m...Continue Reading

References

Nov 18, 2005·Water Research·Yi-Pin Lin, Philip C Singer
Nov 15, 2011·Colloids and Surfaces. B, Biointerfaces·Semra Kırboga, Mualla Oner
Aug 10, 2012·Environmental Science & Technology·Luciaan BoelsGeert-Jan Witkamp
Feb 8, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Michael DietzschWolfgang Tremel

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