Effects of Poly(Galacturonic Acid) on the Properties and Structure of KonjacGlucomannan Aerogel

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摘要 A novel konjac glucomannan (KGM)/poly(galacturonic acid) (PGuA) mixed aerogel (KGM/PGuA) was prepared via a vacuum freeze-drying method, and its interaction mechanism was studied. The rheology results showed that KGM/PGuA mixed gels are typical non-Newtonian pseudoplastic fluids, and PGuA increased the viscosity of the composite aerogel and strengthened the molecular entanglement between KGM and PGuA molecules. The structures of KGM/PGuA aerogels were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the intermolecular interactions were mainly hydrogen bonding. Dense and uniform porous structures were found in the aerogel microstructures. All these findings indicate that PGuA has the effect of enhancing the KGM gel structure, and KGM/PGuA gels with porous structures might be potential materials for use in food and biomedical areas for loading active materials.

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	作者相关文章
	陈思杨
	郭洋洋
	吴丹
	胡碧清
	庞杰

关键词 ：气凝胶, 魔芋葡甘聚糖, 聚半乳糖醛酸

Abstract：A novel konjac glucomannan (KGM)/poly(galacturonic acid) (PGuA) mixed aerogel (KGM/PGuA) was prepared via a vacuum freeze-drying method, and its interaction mechanism was studied. The rheology results showed that KGM/PGuA mixed gels are typical non-Newtonian pseudoplastic fluids, and PGuA increased the viscosity of the composite aerogel and strengthened the molecular entanglement between KGM and PGuA molecules. The structures of KGM/PGuA aerogels were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the intermolecular interactions were mainly hydrogen bonding. Dense and uniform porous structures were found in the aerogel microstructures. All these findings indicate that PGuA has the effect of enhancing the KGM gel structure, and KGM/PGuA gels with porous structures might be potential materials for use in food and biomedical areas for loading active materials.

Key words： aerogel konjac glucomannan poly(galacturonic acid)

收稿日期: 2019-12-02 出版日期: 2020-10-10

基金资助:Supported by the National Natural Science Foundation of China (31772045)

通讯作者: pang3721941@163.com E-mail: pang3721941@163.com

引用本文:

陈思杨;郭洋洋;吴丹;胡碧清;庞杰. Effects of Poly(Galacturonic Acid) on the Properties and Structure of KonjacGlucomannan Aerogel[J]. 结构化学, 2020, 39(10): 1817-1823.
CHEN Si-Yang;GUO Yang-Yang;WU Dan;HU Bi-Qing;PANG Jie. Effects of Poly(Galacturonic Acid) on the Properties and Structure of KonjacGlucomannan Aerogel. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2020, 39(10): 1817-1823.

链接本文:

http://manu30.magtech.com.cn/jghx/CN/ 或 http://manu30.magtech.com.cn/jghx/CN/Y2020/V39/I10/1817

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