Unilever Research and Development Laboratory, Port Sunlight, Quarry Road East, Bebington, Wirral, United Kingdom.
Langmuir. 2010 Jun 1;26(11):8036-48. doi: 10.1021/la1000057.
The adsorption of the nonionic surfactant hexaethylene monododecyl ether, C(12)E(6), and the mixed nonionic/cationic surfactants C(12)E(6) and hexadecyl trimethyl ammonium bromide, C(16)TAB, onto the hydrophilic and hydrophobic surfaces of thin cellulose films, formed by Langmuir-Blodgett, L-B, deposition, have been studied by neutron reflectivity. For the surfactant mixtures, considerable nonideal mixing is observed at both hydrophobic and hydrophilic surfaces. The results demonstrate that the C(12)E(6), C(12)E(6)/C(16)TAB mixture and solvent have a greater penetration into the cellulose film upon adsorption, compared to that observed in previous studies of C(16)TAB adsorbed onto cellulose, due to the presence of the nonionic surfactant. From the range of measurements made, it is concluded that both the presence of the nonionic surfactant and the nature of the cellulose films are both contributing factors to this increased penetration and swelling of the cellulose film.
通过中子反射率研究了由 Langmuir-Blodgett（LB）沉积形成的纤维素薄膜的亲水性和疏水性表面对非离子表面活性剂十六烷醚、C（12）E（6）和混合非离子/阳离子表面活性剂十六烷醚和十六烷基三甲基溴化铵、C（16）TAB 的吸附。对于表面活性剂混合物，在疏水性和亲水性表面均观察到相当大的非理想混合。结果表明，与先前研究的十六烷基三甲基溴化铵吸附在纤维素上的情况相比，在吸附时，C（12）E（6）、C（12）E（6）/C（16）TAB 混合物和溶剂更易渗透到纤维素薄膜中，这是由于存在非离子表面活性剂。从所进行的一系列测量中得出结论，非离子表面活性剂的存在和纤维素膜的性质都是导致纤维素膜渗透和溶胀增加的因素。
