Unilever Research and Development Laboratory, Port Sunlight, Bebington, Wirral, United Kingdom.
Langmuir. 2012 Jul 10;28(27):10223-9. doi: 10.1021/la3019277. Epub 2012 Jun 25.
The interaction of the anionic surfactant, sodium dodecylsulfate (SDS), with the hydrophilic surface of a thin cellulose film and the role of electrolyte (0.1 M NaCl) and the polyelectrolyte, poly(dimethyldiallyl ammonium chloride) [polydmdaac], have been studied by neutron reflectivity (NR). The thin cellulose films were prepared by Langmuir-Blodgett (LB) deposition of trimethylsilyl-cellulose (TMSC) on silicon, and the hydrophilic surface was produced by the cleaving of the terminal methyl groups of the TMSC by HCl vapor. Despite both the surfactant and cellulose surfaces being nominally anionic, SDS adsorption and swelling of the cellulose film occurred during adsorption. The results show that the nature of the adsorption and the extent of the penetration into the cellulose film can be controlled by the addition of electrolyte, NaCl, and cationic polyelectrolyte, polydmdaac.
阴离子表面活性剂十二烷基硫酸钠（SDS）与纤维素薄膜亲水表面的相互作用以及电解质（0.1 M NaCl）和聚电解质聚二甲基二烯丙基氯化铵[polydmdaac]的作用已通过中子反射率（NR）进行了研究。通过三甲基硅基纤维素（TMSC）在硅上的Langmuir-Blodgett（LB）沉积制备了纤维素薄膜，并且通过 HCl 蒸气裂解 TMSC 的末端甲基基团产生了亲水表面。尽管表面活性剂和纤维素表面都具有名义上的阴离子性，但在吸附过程中 SDS 吸附和纤维素膜的溶胀都发生了。结果表明，通过添加电解质 NaCl 和阳离子聚电解质 polydmdaac 可以控制吸附的性质和在纤维素膜中的渗透程度。
