In current study, cellouronic acid sodium (CAS), obtained from bagasse pith, has been introduced into poly(acrylamide-co-diallyldimethylammonium chloride) (poly(AM-co-DAC)) network to form novel thermo-sensitive semi-IPNs. The structure and morphology of the hydrogels were proved by Fourier transformation infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The effects of CAS content, initiator charge, cross-linker dosage and swelling-medium property on the thermo-responsive water absorptivity were investigated in detail. The results elucidated that the prepared gels exhibited a thermo-sensibility with an upper critical solution temperature (UCST) and a high water-absorbency. And the values of UCST and equilibrium swelling ratio largely depended on the inner structure of the semi-IPNs and the external solvent property. It was also revealed that the swelling process conformed to the Schott’s pseudo second order model and diffusion type was non-Fickian diffusion. The value of activation energy for this polyelectrolyte was found to be 8.74 kJ/mol.

中文翻译：

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纤维素钠/聚（丙烯酰胺-共二烯丙基二甲基氯化铵）半IPN的热敏性和溶胀性

在当前的研究中，将从蔗渣中获得的纤维素钠（CAS）引入到聚（丙烯酰胺-共二烯丙基二甲基氯化铵）（poly（AM-co-DAC））网络中，以形成新型的热敏半IPN。通过傅里叶变换红外光谱（FT-IR），X射线光电子能谱（XPS）和扫描电子显微镜（SEM）证明了水凝胶的结构和形态。详细研究了CAS含量，引发剂电荷，交联剂用量和溶胀介质性能对热响应吸水率的影响。结果表明，所制备的凝胶显示出具有高临界溶液温度（UCST）和高吸水率的热敏性。UCST值和平衡溶胀率很大程度上取决于半IPN的内部结构和外部溶剂性能。还发现膨胀过程符合肖特的伪二阶模型，扩散类型为非菲克扩散。发现该聚电解质的活化能值为8.74kJ / mol。