Dai Hongjie, Huang Huihua
School of Food Science and Engineering, South China University of Technology , Guangzhou 510641, China.
J Agric Food Chem. 2017 Jan 25;65(3):565-574. doi: 10.1021/acs.jafc.6b04899. Epub 2017 Jan 13.
The superabsorbent hydrogels were synthesized by grafting acrylic acid and acrylamide onto pineapple peel carboxymethyl cellulose and effect of carclazyte introduction was compared. The structure and morphology of the superabsorbents were investigated by Fourier transform infrared spectroscopy, X-ray diffraction, and field emission scanning electron microscopy. Swelling behaviors of the superabsorbents were investigated in distilled water, 0.9% NaCl solution, various salt and pH solutions, as well as surfactant solutions and simulated physiological fluids. The swelling dynamic mechanism of the superabsorbents was explained well by Fickian diffusion and Schott's pseudo-second-order models. The introduction of carclazyte effectively improved the swelling capacity of the superabsorbents in various solutions as well as its salt- and pH-sensitivity. The prepared superabsorbents also exhibited excellent sensitivities to various surfactant solutions and simulated physiological fluids, showing potential applications in the biomaterials field.
通过将丙烯酸和丙烯酰胺接枝到菠萝皮羧甲基纤维素上合成了高吸水性水凝胶，并比较了引入煅烧碳酸钙的效果。通过傅里叶变换红外光谱、X射线衍射和场发射扫描电子显微镜对高吸水性材料的结构和形态进行了研究。研究了高吸水性材料在蒸馏水、0.9%氯化钠溶液、各种盐和pH溶液、表面活性剂溶液以及模拟生理流体中的溶胀行为。用菲克扩散模型和肖特准二级模型很好地解释了高吸水性材料的溶胀动力学机理。煅烧碳酸钙的引入有效地提高了高吸水性材料在各种溶液中的溶胀能力及其盐敏感性和pH敏感性。所制备的高吸水性材料对各种表面活性剂溶液和模拟生理流体也表现出优异的敏感性，在生物材料领域显示出潜在的应用前景。
