Trata-se de uma pesquisa de natureza quanti/qualitativa, cujo objetivo é conhecer a percepção dos enfermeiros assistenciais que atuam em um Hospital Universitário, acerca da Comissão de Controle de Infecção Hospitalar (CCIH) e das atribuições do enfermeiro responsável por esta Comissão. A amostra constituiu-se de 49 enfermeiros das diversas unidades do hospital. Utilizou-se para coleta de dados, um questionário com perguntas semi-abertas relativas aos objetivos do estudo. A pesquisa revela integração entre os profissionais da CCIH e os enfermeiros assistenciais, uma vez que estes demonstraram entendimento com referência as atividades da Comissão e o real papel desempenhado pelo enfermeiro na mesma. Todavia, alguns desafios foram apontados, tais como: a divulgação das finalidades e importância das atividades da CCIH aos enfermeiros que ingressaram no hospital nos últimos dois anos; e a ampliação do número de enfermeiros que respondem pela Comissão
In the present work, we have designed MgCl2/clay/internal donor (ID)/TiCl4 based bisupported Ziegler-Natta catalysts containing varying amounts of organoclay (montmorillonite) in order to synthesize spherical particles of polypropylene/clay nanocomposites (PCN). The organoclay was introduced into the catalyst support formulation and PCN was obtained using the in situ polymerization technique. Decreasing the reaction time, it was possible to obtain nanocomposites with high concentrations of clay (masterbatches). Micrographs of SEM confirmed the spherical morphology of the catalysts. In addition, XRD patterns show that the active sites for polymerization were inserted in the clay galleries. The catalytic performance was evaluated in slurry propylene polymerization using triethylaluminium as cocatalyst and silane as external electron donor at 70 °C, 4 bar, and different reaction times. The PCNs obtained containing different clay amounts were characterized by X-ray diffraction, thermal analyses, transmission electronic microscopy, and extractables in heptane. The results revealed that the synthesized PP/clay particles were also spherical showing that the morphological control is possible even using catalysts containing high amounts of clay. The PCN presented high degradation temperature (459 °C). The XRD peak related to the clay interlamellar distance has shifted to lower angles, and TEM images confirmed the formation of exfoliated/intercalated clay on the PP matrix and absence of microparticles of clay.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.