Synthesis of carboxymethyl starch-g-polyvinylpyrolidones and their properties for the adsorption of Rhodamine 6G and ammonia

Muhammad Haroon; Li Wang; Haojie Yu; Raja Summe Ullah; Zain-Ul-Abdin; Rizwan Ullah Khan; Qing Chen; Jian Liu

doi:10.1016/j.carbpol.2018.01.052

Synthesis of carboxymethyl starch-g-polyvinylpyrolidones and their properties for the adsorption of Rhodamine 6G and ammonia

Carbohydr Polym. 2018 Apr 15:186:150-158. doi: 10.1016/j.carbpol.2018.01.052.

Authors

Muhammad Haroon¹, Li Wang², Haojie Yu³, Raja Summe Ullah¹, Zain-Ul-Abdin¹, Rizwan Ullah Khan¹, Qing Chen¹, Jian Liu⁴

Affiliations

¹ State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, PR China.
² State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, PR China. Electronic address: opl_wl@dial.zju.edu.cn.
³ State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, PR China. Electronic address: hjyu@zju.edu.cn.
⁴ Department of Surgical Oncology, The First Affiliated Hospital of Medical College, Zhejiang University, Hangzhou, 310003, PR China.

PMID: 29455972
DOI: 10.1016/j.carbpol.2018.01.052

Abstract

Carboxymethyl starch-g-polyvinylpyrolidones (CMS-g-PVPs) were prepared by grafting of carboxymethyl starch (CMS) with N-vinylpyrolidone (NVP) using different initiators. The grafting percentage of all the modified starches was determined and the modified starch (CMS-g-PVP-5) with maximum grafting percentage was characterized by elemental analysis, ¹H NMR and FT-IR spectroscopy. Crystallinity and thermal properties of CMS-g-PVP-5 were analysed by XRD and TGA, respectively. CMS-g-PVP-5 was then utilized for the adsorption of Rhodamine 6G (dye) from water under different pH, temperature, adsorbate doze and adsorbent concentration. This modified starch showed good adsorption ability towards Rhodamine 6G. CMS-g-PVP-5 was also applied for the adsorption of ammonia gas and proved an exciting adsorbent for ammonia.

Keywords: Adsorption; Ammonia; Carboxymethyl starch; Graft polymerization; Rhodamine 6G.