用于提高水性多层纳米涂层导电性的聚酰胺酶促改性
Enzymatic Modification of Polyamide for Improving the Conductivity of Water-Based Multilayer Nanocoatings.
作者信息
Jordanov Igor, Stevens Daniel L, Tarbuk Anita, Magovac Eva, Bischof Sandra, Grunlan Jaime C
机构信息
Department of Textile Engineering, Faculty of Technology and Metallurgy, Ss. Cyril and Methodius University, Ruger Boskovic 16, 1000 Skopje, Republic of North Macedonia.
Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, Texas 77843, United States.
出版信息
ACS Omega. 2019 Jul 11;4(7):12028-12035. doi: 10.1021/acsomega.9b01052. eCollection 2019 Jul 31.
Enzymatic modification, using a protease from (Subtilisin A), was carried out on polyamide 6.6 (PA6.6) fabric to make it more amenable to water-based nanocoatings used to impart electrical conductivity. The modified PA6.6 fibers exhibit a smoother surface, increased hydrophilicity due to more carboxyl and amino groups, and larger ζ-potential relative to unmodified polyamide. With its improved hydrophilicity and surface functionality, the modified textile is better able to accept a water-based nanocoating, composed of multiwalled carbon nanotubes (MWCNT) stabilized by sodium deoxycholate (DOC) and poly(diallyldimethylammonium chloride) (PDDA), deposited via layer-by-layer assembly. Relative to unmodified fabric, the enzymatically modified fibers exhibit lower sheet resistance as a function of PDDA/MWCNT-DOC bilayers deposited. This relatively green technique could be used to impart a variety of useful functionalities to otherwise difficult-to-treat synthetic fibers like polyamide.
使用来自（枯草杆菌蛋白酶A）的蛋白酶对聚酰胺6.6（PA6.6）织物进行酶促改性，使其更适合用于赋予导电性的水基纳米涂层。改性后的PA6.6纤维表面更光滑，由于含有更多的羧基和氨基而亲水性增加，并且相对于未改性的聚酰胺具有更大的ζ电位。由于其亲水性和表面功能得到改善，改性纺织品能够更好地接受通过逐层组装沉积的由脱氧胆酸钠（DOC）和聚二烯丙基二甲基氯化铵（PDDA）稳定的多壁碳纳米管（MWCNT）组成的水基纳米涂层。相对于未改性的织物，酶促改性纤维的表面电阻随着PDDA/MWCNT-DOC双层的沉积而降低。这种相对绿色的技术可用于为聚酰胺等难以处理的合成纤维赋予各种有用的功能。
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