...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of inorganic and organometallic polymers and materials >Physical and Chemical Characterisation of Acrylamide-Based Hydrogels, Aam, Aam/NaCMC and Aam/NaCMC/MgO
【24h】

Physical and Chemical Characterisation of Acrylamide-Based Hydrogels, Aam, Aam/NaCMC and Aam/NaCMC/MgO

机译：丙烯酰胺基水凝胶，Aam，Aam / NaCMC和Aam / NaCMC / MgO的理化特性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To find out the best structure of acrylamide-based hydrogels, three different composites are synthesized and characterized. Polyacrylamide-based hydrogels were obtained by chemical crosslinking of MBA using acrylamide, sodium carboxymethylecellulose (NaCMC), N,N,N',N'-tetramethylethylenediamine (TEMED) and ammonium persulfate (APS) as the initiators. The interest in MgO nanoparticles is not only due to their stability under harsh process conditions but also for human health, where they are known to be necessary minerals. It is expected that the structure of the hydrogels can be affected positively by using MgO as a nanoparticle in their composite. To control the initial burst release through modification of the structure of the matrix, the MgO nanoparticles are applied. These nanoparticles can affect the release mechanism. In the current research, FESEM, NMR, DTA/TGA and DSC are studied for the structure of polymers. In the FESEM, existing MgO inside the hydrogel system brings about a shift in the porosity of hydrogels. The H-1 NMR spectrum of polymers showed characteristic proton peaks at 4.6 and 4.7, 6.1 and 6.2 ppm. An endothermic peak indicating loss of weakly bound water molecules from the hydrogel network is shown in DTA curves of hydrogels at around 80 A degrees C. An exothermic peak at around 270 A degrees C for Aam and Aam/NaCMC hydrogels and also a peak at 360 A degrees C in Aam and Aam/NaCMC hydrogels and 320 A degrees C for Aam/NaCMC/MgO is shown. The DSC profiles of the hydrogels show that water has a higher evaporation temperature in the polyacrylamide hydrogel (84 A degrees C).The largest depression of the temperature was observed on the Aam/NaCMC/MgO hydrogel (a dagger T = 94 A degrees C), which confirmed the higher hydrophilicity of Aam/NaCMC/MgO as compared to pure Aam hydrogel and Aam/NaCMC hydrogel.
机译：为了找出基于丙烯酰胺的水凝胶的最佳结构，合成并表征了三种不同的复合材料。通过使用丙烯酰胺，羧甲基纤维素钠（NaCMC），N，N，N'，N'-四甲基乙二胺（TEMED）和过硫酸铵（APS）作为引发剂对MBA进行化学交联，获得基于聚丙烯酰胺的水凝胶。对MgO纳米颗粒的兴趣不仅是由于其在苛刻的工艺条件下的稳定性，而且还因为人类健康，因为已知它们是必需的矿物质。期望通过在其复合物中使用MgO作为纳米颗粒可以积极地影响水凝胶的结构。为了通过改变基质的结构来控制初始的猝发释放，使用了MgO纳米颗粒。这些纳米颗粒可以影响释放机理。在目前的研究中，FESEM，NMR，DTA / TGA和DSC用于研究聚合物的结构。在FESEM中，水凝胶系统内部存在的MgO引起水凝胶孔隙率的变化。聚合物的H-1 NMR光谱在4.6和4.7、6.1和6.2 ppm处显示特征质子峰。在80 A左右的水凝胶的DTA曲线中显示了吸热峰，表明弱结合的水分子从水凝胶网络中流失。Aam和Aam / NaCMC水凝胶在270 A左右的放热峰以及360的峰示出了在Aam和Aam / NaCMC水凝胶中的摄氏度，在Aam / NaCMC / MgO中为320摄氏度。水凝胶的DSC曲线表明，聚丙烯酰胺水凝胶中的水具有较高的蒸发温度（84 A摄氏度）.Aam / NaCMC / MgO水凝胶的温度下降幅度最大（匕首T = 94 A摄氏度） ），这证实了与纯Aam水凝胶和Aam / NaCMC水凝胶相比，Aam / NaCMC / MgO具有更高的亲水性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号