Design of functional materials with tunable properties based on anionically-modified copolymer network of poly (N-isopropyl acrylamide-co-methacrylic acid) P(NIPA-co-MA) containing linear polyacrylamide and various amounts of Halloysite nanotubes (Hal) was presented using a facile route of solution casting. The organic/inorganic nanostructures based on thermo-responsive PNIPA were constructed to create hybrid materials via in situ polymerization with different Hal-loading and then used for the removal of cationic methylene blue (MB) dye from aqueous solutions. To achieve the desired mechanical property, the optimum composition of hybrids was determined following a simple and cost-effective synthesis procedure. In situ one-pot polymerization was promoted by semi-IPN formation, following a much simpler route than traditional preparation approaches for stable cross-linked hybrid formation. The swelling of hybrids decreased by 2.9-fold with loading of 5.40 % Hal, confirming the hydrogen bonding interactions between Hal and PAAm/P(NIPA-co-MA) network. The mechanical properties of Hal-doped hybrid gels showed an increase–decrease tendency with increase of Hal-content from 0.80 to 5.40 % (w/v) due to the high aspect ratio of Hal and strong secondary interactions between Hal and PAAm/P(NIPA-co-MA) chains. The effective cross-link density for Hal-doped hybrids was expressed by a cubic polynomial as a function of Hal concentration. Temperature-sensitive swelling results showed that the advantage of sustained release property of Hal can be combined with excellent controllability of PNIPA-based network. Adsorption results of MB onto Hal-doped hybrids bearing methacrylic acid moieties demonstrated their potential as efficient adsorbents for the removal of cationic dyes. A new route offered by the proposed procedure for design of hybrids containing “green” one-dimensional nanofillers creates an innovative perspective on robust hybrid structures for practical applications.

中文翻译：

---

具有易于实现的位点特异性（烷基）酰胺和羧基的阴离子混合凝胶的原位埃洛石功能化


提出了基于包含线性聚丙烯酰胺和不同量埃洛石纳米管（Hal）的聚（N-异丙基丙烯酰胺-共-甲基丙烯酸）P（NIPA-co-MA）阴离子改性共聚物网络的具有可调性能的功能材料的设计溶液流延的简便途径。基于热响应 PNIPA 的有机/无机纳米结构被构建为通过原位聚合以不同的 Hal 负载量创建杂化材料，然后用于从水溶液中去除阳离子亚甲基蓝 (MB) 染料。为了实现所需的机械性能，通过简单且具有成本效益的合成程序确定了杂化物的最佳组成。半互穿网络的形成促进了原位一锅聚合，其路线比传统的稳定交联杂化物形成的制备方法简单得多。当 Hal 负载量为 5.40% 时，杂化物的膨胀降低了 2.9 倍，证实了 Hal 和 PAAm/P(NIPA-co-MA) 网络之间的氢键相互作用。由于Hal的高长径比和Hal与PAAm/P之间强烈的二次相互作用，Hal掺杂杂化凝胶的机械性能随着Hal含量从0.80％（w/v）增加到5.40％（w/v）而呈现出增加-减少的趋势（ NIPA-co-MA)链。 Hal 掺杂杂化物的有效交联密度由三次多项式表示为 Hal 浓度的函数。温敏溶胀结果表明，Hal 缓释特性的优势可以与基于 PNIPA 的网络的优异可控性相结合。 MB 在带有甲基丙烯酸部分的 Hal 掺杂杂化物上的吸附结果证明了它们作为去除阳离子染料的有效吸附剂的潜力。 所提出的包含“绿色”一维纳米填料的混合体设计程序提供了一条新途径，为实际应用中稳健的混合结构创造了创新视角。