Thermoplastic Extrusion to Highly‐Loaded Thin Green Fibres Containing Pb(Zr,Ti)O₃

Abstract

textile fabrics, when water droplets are sucked in, a capillary rise test was performed. [16,20] Vertically hanging strips of a textile are immersed with the lower end into a liquid and the rise of the liquid within the textile is observed. Using Washburn's equation the apparent static contact angle within the textile structure can then be obtained by cosh H eq R S rg 2c (1) with the gravitational constant g, the density r and the surface tension c of the liquid. [21] Assuming a complete wetting (cos h = 1) with a liquid of a low surface tension such as decaline (32.3 mN/m), the geometric pore radius R S can be calculated from the saturation height H eq when capillary and gravity are in equilibrium. Using R S derived with decaline, the static water contact angle can then be given for a textile fabric by evaluating the capillary rise test using bi-distilled water (72.2 mN/m). Textile contact angles are compared with the corresponding water contact angles on a flat substrate such as a PET foil using the same plasma treatment. Thus, the capillary rise test enables the evaluation of the penetration of reactive plasma species into the textile structure, which is relevant for the capillary transport during pad dyeing.

Effects of rheology on the interface of Pb(Zr, Ti)O3 monofilament composites obtained by co-extrusion

“…3 The thermoplastic binder was chosen based on previous work. 18 The density values were obtained using a helium pycnometer (Micromeritics, AccuPyc 1330).…”

Obtenção de amidos termoplásticos para a extrusão de pós cerâmicos

“…Baixos valores de torque são geralmente requeridos durante a extrusão de feedstocks cerâmicos a fim de evitar uma possível separação das fases pó-ligante. Estudos anteriores com termoplásticos hidrofílicos (como poliamida e polimetilmetacrilato) reportaram a ineficiência destes materiais na formulação de feedstocks em virtude da sua decomposição sob condições de alta temperatura e/ou elevado cisalhamento [23] .…”

Tailoring the microstructure of porous MgO supports for asymmetric oxygen separation membranes: Optimization of thermoplastic feedstock systems

“…significantly reduced dust formation during the kneading process). J. Heiber et al also showed that feedstock properties could be improved using pre-coated powders [19]. Measurements of the particle size distribution (PSD) were undertaken using a particle size analyzer (LS 13320, Beckman coulter, Inc, USA).…”