Layer-by-Layer-Assembled Multilayer Films of Polyelectrolyte-Stabilized Surfactant Micelles for the Incorporation of Noncharged Organic Dyes

Abstract

Noncharged pyrene molecules were incorporated into multilayer films by first loading pyrene into poly(acrylic acid) (PAA)-stabilized cetyltrimethylammonium bromide (CTAB) micelles (noted as PAA&(Py@CTAB)) and then layer-by-layer (LbL) assembled with poly(diallyldimethylammonium chloride) (PDDA). The stable incorporation of pyrene into multilayer films was confirmed by quartz crystal microbalance (QCM) measurements and UV-vis absorption spectroscopy. The resultant PAA&(Py@CTAB)/PDDA multilayer films show an exponential growth behavior because of the increased surface roughness with increasing number of film deposition cycles. The present study will open a general and cost-effective avenue for the incorporation of noncharged species, such as organic molecules, nanoparticles, and so forth, into LbL-assembled multilayer films by using polyelectrolyte-stabilized surfactant micelles as carriers.

Fabrication of free-standing polyelectrolyte multilayer films: A method using polysulfobetaine-containing films as sacrificial layers

“…3.5 nm and 7.8 nm for m = 5 and 10, respectively. Similar phenomena were also reported recently in other polyelectrolyte multilayer systems [32,38,39]. Fig.…”

High Efficient Loading of Hydrophobic Molecules in Layer-by-Layer Assembled Microgel Films with the Assistance of Surfactant Micelles

“…最近, 我们研究组以聚电解质稳定 的表面活性剂胶束负载疏水分子, 再与带有相反电荷的 聚电解质层层组装, 实现了疏水分子在层层组装聚合物 膜内的高负载 [14] . 我们将包覆有芘分子(Py)的十六烷基 三甲基胺溴化物(CTAB)(记作 Py@CTAB)与带有负电荷 的聚丙烯酸(PAA)复合制备 PAA 稳定的 Py@CTAB 复 合物(记作 PAA-(Py@CTAB)), 将 PAA-(Py@CTAB)复 合物与聚二甲基二烯丙基铵盐酸盐(PDDA)交替沉积, 制备了大量负载 Py 分子的 PAA-(Py@CTAB)/PDDA 复 合膜 [14] . 表面活性剂胶束一方面避免了嵌段共聚物的 合成, 另一方面, 聚电解质稳定的表面活性剂胶束复合 物具有大的尺寸和对疏水分子高的包覆能力, 因而聚电 解质稳定的表面活性剂胶束提供了一种简便的实现疏 水物质在层层组装膜中高效负载的方法.…”

“…同时, NaCl 的加入降低了 HA 聚合物链内的电荷斥力而 使 HA 采取更为卷曲的构象 [15] , 进而导致 HA 沉积量随 芘分子荧光光谱在 373 nm 与 383 nm 两处发射峰强 度的比值(I 373 /I 383 )对芘分子所处的微环境极其敏感 [14,17] . 图 4 为负载了 Py 0.25 -SDS 胶束后的(PAH-D/HA)*10 微凝 胶 膜 的 荧 光 光 谱 .…”

Wool keratin: A novel building block for layer-by-layer self-assembly

“…The absorbance increases rapidly in the first 15 min until a saturation state is reached. It is already known that one layer of PDDA can reach saturation in 20 min [53], therefore in the following LbL assembly, we fix the deposition time of 20 min for each layer. Fig.…”