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首页> 外文期刊>Journal of Applied Polymer Science >Uncatalyzed photografting of polyacrylamide from functionalized cellulosic and lignocellulosic materials
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Uncatalyzed photografting of polyacrylamide from functionalized cellulosic and lignocellulosic materials

机译：从功能化纤维素和木质纤维素材料进行的未催化光接枝聚丙烯酰胺

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摘要

Photoinitiated graft copolymerization of polyacrylamide (PAAm) occurred on one cellulosic (cotton fabric) and one lignocellulosic (sisal fiber) substrate using a novel photocatalytic system. The samples were photoexposed with oxalic acid solutions, differing in acid concentrations, which functionalized the backbone materials to different extents with carboxyl groups, and at the same time rendered them photoactive. Afterwards, the functionalized samples were again photoexposed with monomer (AAm) solution and photografting was found to take place without any initiator from outside. The effects of increased acid dose level and increased monomer concentration on different grafting parameters were measured. The graft copolymer formation was confirmed by FTIR and DSC studies; XRD and SEM techniques were applied for morphological studies. Textile-related properties, namely tensile properties, moisture regain, and dye uptake properties of both the ungrafted and grafted materials were also measured using proper instruments and techniques.
机译：使用一种新型的光催化系统，在一种纤维素（棉织物）和一种木质纤维素（剑麻纤维）基材上发生了聚丙烯酰胺（PAAm）的光引发接枝共聚反应。用酸浓度不同的草酸溶液对样品进行光曝晒，草酸溶液会用羧基在不同程度上官能化骨架材料，同时使它们具有光活性。然后，将官能化的样品再次用单体（AAm）溶液曝光，发现发生了光接枝，而没有来自外部的任何引发剂。测量了增加酸剂量水平和增加单体浓度对不同接枝参数的影响。 FTIR和DSC研究证实了接枝共聚物的形成。 XRD和SEM技术用于形态学研究。还使用适当的仪器和技术来测量未接枝材料和接枝材料的纺织品相关性能，即拉伸性能，回潮率和染料吸收性能。

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