基于瓜尔胶的可生物降解、抗菌且导电的水凝胶。
Guar gum based biodegradable, antibacterial and electrically conductive hydrogels.
作者信息
Kaith Balbir S, Sharma Reena, Kalia Susheel
机构信息
Department of Chemistry, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar 144 011, Punjab India.
School of Chemistry, Shoolini University, Solan 173 212, HP, India.
出版信息
Int J Biol Macromol. 2015 Apr;75:266-75. doi: 10.1016/j.ijbiomac.2015.01.046. Epub 2015 Feb 3.
Guar gum-polyacrylic acid-polyaniline based biodegradable electrically conductive interpenetrating network (IPN) structures were prepared through a two-step aqueous polymerization. Hexamine and ammonium persulfate (APS) were used as a cross linker-initiator system to crosslink the poly(AA) chains on Guar gum (Ggum) backbone. Optimum reaction conditions for maximum percentage swelling (7470.23%) were time (min) = 60; vacuum (mmHg) = 450; pH = 7.0; solvent (mL) = 27.5; [APS] (mol L(-1)) = 0.306 × 10(-1); [AA] (mol L(-1)) = 0.291 × 10(-3) and [hexamine] (mol L(-1))=0.356 × 10(-1). The semi-interpenetrating networks (semi-IPNs) were converted into IPNs through impregnation of polyaniline chains under acidic and neutral conditions. Fourier transform infra-red spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) techniques were used to characterize the semi-IPNs and IPNs. Synthesized semi-IPNs and IPNs were further evaluated for moisture retention in different soils, antibacterial and biodegradation behavior.
通过两步水相聚合制备了基于瓜尔胶-聚丙烯酸-聚苯胺的可生物降解导电互穿网络（IPN）结构。六亚甲基四胺和过硫酸铵（APS）用作交联剂-引发剂体系，以交联瓜尔胶（Ggum）主链上的聚（AA）链。最大溶胀百分比（7470.23%）的最佳反应条件为：时间（分钟）=60；真空度（mmHg）=450；pH=7.0；溶剂（mL）=27.5；[APS]（mol L⁻¹）=0.306×10⁻¹；[AA]（mol L⁻¹）=0.291×10⁻³以及[六亚甲基四胺]（mol L⁻¹）=0.356×10⁻¹。通过在酸性和中性条件下浸渍聚苯胺链，将半互穿网络（semi-IPNs）转化为互穿网络（IPNs）。采用傅里叶变换红外光谱（FTIR）、热重分析（TGA）和扫描电子显微镜（SEM）技术对semi-IPNs和IPNs进行表征。对合成的semi-IPNs和IPNs在不同土壤中的保水性能、抗菌性能和生物降解行为进行了进一步评估。
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