Yielding and thixotropic cellulose microgel-based network in high-content surfactant for stably suspending of functional beads
Yielding and thixotropic cellulose microgel-based network in high-content surfactant for stably suspending of functional beads
复制标题
高含量表面活性剂中基于产率和触变性纤维素微凝胶的网络，用于稳定悬浮功能珠
DOI：
10.1016/j.ijbiomac.2022.10.214
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发表时间：
2022
影响因子：
8.2
通讯作者：
Yuxin Liu
中科院分区：
文献类型：
--
作者：
yingchao Wang;Xiaoli Zhu;Zhengyun Xie;Jianquan Hu;Bin Hu;Ziting Yuan;Wei Tang;Liangliang An;Kai Li;Yuxin Liu
功能性颗粒，如香料、酶或防螨剂的微胶囊，期望稳定地悬浮在高含量表面活性剂溶液中，为家用产品提供额外的功能。由于高含量表面活性剂的解离，大多数直链或支链聚合物不能改善高含量表面活性剂溶液的流变性能，特别是悬浮能力。本研究以2，2，6，6-四甲基哌啶-1-氧自由基氧化细菌纤维素微凝胶（T-microgel）和羟丙基甲基纤维素（HPMC）为“岛”和“链”，在高浓度表面活性剂溶液中自组装形成具有触变性的连续网络。微凝胶在高含量表面活性剂中的悬浮能力优于纤维素钠和羧甲基纤维素。这是首次报道基于纤维素微凝胶的流变改性剂。T-microgel/HPMC合成体系与高含量的表面活性剂混合后呈现典型的Carreau-Yasuka流体。同时，考察了羟丙基甲基纤维素（HPMC）和表面活性剂对复合体系流变性能的影响，找到了“岛”/“链”复合体系的最佳配比，成功地改善了复合体系的产率和触变性。探索了这种组合体系的潜在应用，发现其在高浓度下与所有类型的表面活性剂一起工作，这比大多数商业悬浮剂更有利。
Functional particles, such as microcapsules of perfumes, enzymes, or anti-mite agents, are desired to stably suspend in the high-content surfactant solution, providing additional functionalities for household products. Due to the disassociation of high-content surfactant, most linear or branched polymers would fail to modify the rheological properties of the high-content surfactant solution, especially for the suspending ability. In this research, the 2,2,6,6-tetramethylpiperidine-1-oxyl oxidized bacterial cellulose microgel (T-microgel) and hydroxypropyl methylcellulose (HPMC) were employed as “island” and “chain,” respectively, which could self-assemble together to fabricate a yield and thixotropic continuous network in a high-content surfactant solution. The suspending ability of microgel in high-content surfactant is better than cellulose nanofiber and carboxymethylcellulose. This is the first time to report a cellulose microgel-based rheological modifier. T-microgel/HPMC synthetic system mixed with high content surfactant presented a typical Carreau–Yasuka fluid. Meanwhile, the effects of the HPMC and surfactant on the rheological properties of the combined system were investigated, and an optimal ratio for the ‘island’/‘chain’ synthetic system was found to modify its yield and thixotropy behavior successfully. The potential application of this combined system was explored and found to work with all kinds of surfactants at high concentrations, which is more advantageous than most commercial suspending agents.