Fused deposition modeling (FDM) is a typical 3D printing technology and preparation of qualified filaments is the basis. In order to prepare polylactic acid (PLA) filaments suitable for personalized FDM 3D printing, this article investigated the effect of factors such as extrusion temperature and screw speed on the diameter, surface roughness and ultimate tensile stress of the obtained PLA filaments. The optimal process parameters for fabrication of qualified filaments were determined. Further, the printable performance of the obtained PLA filaments for 3D objects was preliminarily explored.
The coating agent was prepared by adding nano-titanium dioxide(nano-Tio2) and flame retardant to solvent-based polyurethane(PU),then applied to cotton knitted fabric which was finished by padding flame retardant through transfer coating technique, so a multifunctional coating fabric with flame retardancy and anti-UV property was manufactured. Discussing the changes in flame retardancy and anti-UV property with the increase in addition of flame retardant and nano-titanium dioxide. The results showed that the fabric has good flame retardancy and anti-UV property.
This study explores how and when customer participation in service delivery promotes employees work-to-family enrichment. Using two-wave data collected from 160 employees in a hotel, we found that, when customers participate more in their daily work, employees would enrich their family role from their work role more through increased relational job crafting. In addition, employees organizational-based self-esteem (OBSE) accentuates the positive linkage between customer participation and employees relational crafting, and subsequently work-to-family enrichment. By taking different parties in one's work life (i.e., customers, work per se, and family) into consideration, this study makes important contributions to extant literature on work-to- family enrichment and job crafting as well. It also carries important implications for service organizations to support employees proactive participation in job crafting and enrich their family life.
The solution shearing method has previously been used to tune the molecular packing and crystal thin film morphology of small molecular organic semiconductors (OSCs). Here, we study how the solution shearing method impacts the thin film morphology and causes structural rearrangements of two polymeric OSCs with interdigitated side chain packing, namely P2TDC17FT4 and PBTTT-C16. The conjugated backbone tilt angle and the thin film morphology of the P2TDC17FT4 polymer were changed by the solution shearing conditions, and an accompanying change in the charge carrier mobility was observed. For PBTTT-C16, the out-of-plane lamellar spacing was increased by solution shearing, due to increased disorder of side chains. The ability to induce structural rearrangement of polymers through solution shearing allows for an easy and alternative method to modify OSC charge transport properties.
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