以自制乙烯基杂化二氧化硅纳米微球(VSNPs)为交联剂,丙烯酸(AA)为单体,通过自由基共聚法合成了PAA基纳米复合水凝胶。研究了VSNPs含量对水凝胶溶胀性能的影响。实验表明,当VSNPs含量为0.7%时,水凝胶较在50℃去离子水中溶胀率高达5000g/g。同时,还探讨了该水凝胶在不同浓度的盐和尿素溶液,以及不同pH溶液中的溶胀性能。并采用傅里叶变换红外光谱仪、扫描透镜和扫描电镜技术对其进行了表征。
PAA-based nanocomposite hydrogels (VSNPs-PAA) were synthesized through free radical copolymerization by using self-made vinyl hybrid silica nanospheres (VSNPs) as crosslinking agent,and acrylic acid (AA) as monomer.The effect of the content of silica microspheres on the swelling performance of the hydrogel was studied.The swelling rate of the hydrogel can exceed 5000g/g at 50℃ when the content of the microspheres was about 0.7%.The swelling performance of the hydrogel in different concentrations of salt and urea solutions and different pH solutions was also discussed.It was characterized by fourier transform infrared spectrometer (FT-IR),transmission electron microscopy (TEM) and scanning electron microscope (SEM).
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基金资助
国家自然科学基金资助项目(51703123)
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