Preparation and characterization of thermoresponsive starch ether/sodium alginate composite hydrogels

doi:10.16535/j.cnki.dlhyxb.2021-176

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Journal of Dalian Fisheries University ›› 2022, Vol. 37 ›› Issue (3) : 505-512. DOI: 10.16535/j.cnki.dlhyxb.2021-176

Preparation and characterization of thermoresponsive starch ether/sodium alginate composite hydrogels

PANG Zijian,XU Yuan,JIANG Shuo,SUN Meng,JIANG Qian,SUN Wei,ZHA Xiaohan,SHANG Yue,DAI Mingyun,LIU Ying,TIAN Ye

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Abstract

A thermoresponsive hydrogel composed of 2-hydroxy-3-isopropoxypropyl starch (HIPS) and sodium alginate (SA) was synthesized via cross-linking with hybrid crosslinkers including ethylene glycol diglycidyl ether (EDGE) and calcium chloride (CaCl2).Attenuated total reflection infrared spectroscopy (FT-IR) was used to confirm the occurrence of crosslinking.The HIPS/SA composite hydrogels were investigated for their porous architecture and thermoresponsive property using scanning electron microscopy (SEM).The reaction temperature and reaction time significantly affected the swelling rate of HIPS/SA composite hydrogels (P<0.01).The optimum HIPS/SA hydrogel synthesis was observed under conditions of HIPS concentration of 6.5% (2 g),SA concentration of 4.5% (2 g),NaOH of 300 μL,EDGE of 300 μL,reaction temperature of 55 ℃ and reaction period of 3 h,with the hydrogel swelling ratio of 44.20 under above conditions.It was found that the HIPS/SA hydrogel possessed desirable thermoresponsive property,and the swelling rate (SR) of hydrogel was sharply decreased when the temperature was higher than volume phase transition temperature (VPTT) 34.9 ℃.The HIPS/SA hydrogel with thermoresponsive properties synthesised in this study can provide a new method for the application in the fields of drug delivery and separation engineering.

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alginate;hydrogel / thermoresponsive / starch ether

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PANG Zijian, XU Yuan, JIANG Shuo, SUN Meng, JIANG Qian, SUN Wei, ZHA Xiaohan, SHANG Yue, DAI Mingyun, LIU Ying, TIAN Ye. Preparation and characterization of thermoresponsive starch ether/sodium alginate composite hydrogels[J]. Journal of Dalian Fisheries University, 2022, 37(3): 505-512 https://doi.org/10.16535/j.cnki.dlhyxb.2021-176