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  • SAGE Publications  (4)
  • 1
    Online Resource
    Online Resource
    The Structure, Properties and Application of NR/BR/OMMT Nanocomposites
    SAGE Publications ; 2010
    In:  High Performance Polymers Vol. 22, No. 6 ( 2010-09), p. 649-665
    Details
    In: High Performance Polymers, SAGE Publications, Vol. 22, No. 6 ( 2010-09), p. 649-665
    Abstract: Almost completely exfoliated natural rubber/butadiene rubber/organophilic montmorillonite (NR/BR/OMMT) nanocomposites were successfully prepared by mechanical blending. The optimal type of OMMT was carefully selected, using characterization by X-ray diffraction (XRD) and the mechanical properties of composites, from three NR/BR/OMMT composites with different kinds of OMMT. The almost completely exfoliated NR/BR/OMMT nanocomposites were confirmed by transmission electron microscopy (TEM) and XRD. Then a series of NR/BR/OMMT (the optimal organoclay) nanocomposites with various amounts of OMMT were prepared and characterized. The results showed the tensile strength and tear strength of nanocomposite with only 3 parts per hundreds of rubber (phr) of clay were improved by about 90.8 and 54.0% in comparison with the pure NR/BR, respectively; and the stress relaxation behavior showed the equilibrium stress was higher than that of the pure sample. The increase of the cure rate index (VC) and reduction of the optimum time ( T 90 ) indicated the efficiency of vulcanization was improved. The addition of OMMT also improved the oil resistance of the NR/BR composite; however, the thermal stability was not changed significantly. The outstanding performance of these tire sidewall materials with OMMT reinforcement means that they are good prospects for application in the tire industry.
    Type of Medium: Online Resource
    ISSN: 0954-0083 , 1361-6412
    URL: Article
    DOI: 10.1177/0954008309354610
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 1483713-4
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Study on a High Performance Packaging Material of HDPE/LLDPE/OMMT Nanocomposites
    SAGE Publications ; 2010
    In:  Polymers and Polymer Composites Vol. 18, No. 4 ( 2010-05), p. 181-188
    Details
    In: Polymers and Polymer Composites, SAGE Publications, Vol. 18, No. 4 ( 2010-05), p. 181-188
    Abstract: New types of HDPE/LLDPE/OMMT nanocomposites, which were used as packaging materials, were prepared by direct injection moulding without any compatibiliser. This method was similar to the film forming technology. TEM observation revealed that the OMMT layers were homogeneously dispersed throughout the matrix at the nano-scale. The results of mechanical properties measurement showed that the tensile strength, tensile modulus, flexural strength and flexural modulus were improved remarkably with small amounts of OMMT, whose contents were below 6.0 wt.%. For example, the yield strength of the nanocomposite with 4.0 wt.% OMMT was 32.8 MPa, which increased 27.6% compared with that of the neat sample. Meanwhile, the heat deflection temperature values and TGA results showed that the thermal stability also improved.
    Type of Medium: Online Resource
    ISSN: 0967-3911 , 1478-2391
    URL: Article
    DOI: 10.1177/096739111001800402
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2010
    detail.hit.zdb_id: 2099644-5
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  • 3
    Online Resource
    Online Resource
    Goal-directed perfusion for reducing acute kidney injury in cardiac surgery: A systematic review and meta-analysis
    SAGE Publications ; 2023
    In:  Perfusion Vol. 38, No. 3 ( 2023-04), p. 591-599
    Details
    In: Perfusion, SAGE Publications, Vol. 38, No. 3 ( 2023-04), p. 591-599
    Abstract: Acute kidney injury (AKI) is a common complication following cardiopulmonary bypass (CPB) which can affect morbidity and mortality. Goal-directed perfusion (GDP) intended to avoid the nadir oxygen delivery index below the critical value is associated with reduced postoperative AKI. However, current studies suggested that GDP can only decrease the incidence of AKI stage 1 but showed no effects on AKI stages 2–3 and mortality. The objective of the present meta-analysis is to deter the effects of GDP on postoperative AKI in any stage and mortality following cardiac surgery. Methods MEDLINE, Embase, and the Cochrane Library were searched to identify all clinical trials comparing GDP with control (standard care) during cardiopulmonary bypass conducting in adults undergoing cardiac surgery. The primary outcome was postoperative acute kidney injury. Secondary outcomes included postoperative mortality and length of ICU stay. Data synthesis was obtained by using risk ratio with 95% confidence interval by a random-effects model. Result From 1094 potential studies, 3 trials enrolling 777 patients were included. Meta-analysis suggested the GDP strategy based on DO 2 i reduced postoperative AKI compared with standard CPB management (RR = 0.52; 95% CI: 0.38–0.70; p 〈 .0001), especially in AKI stage I (RR = 0.47; 95% CI: 0.33–0.66; p 〈 .0001). But the GDP strategy did not reduce the incidence of severe AKI (stages 2–3) and postoperative mortality. Conclusion The GDP strategy based on DO 2 i during CPB obviously reduces AKI stage 1 and thus reduces overall AKI incidence. But it shows no effects on severe AKI (stages 2–3) and mortality.
    Type of Medium: Online Resource
    ISSN: 0267-6591 , 1477-111X
    URL: Article
    DOI: 10.1177/02676591211073783
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2023
    detail.hit.zdb_id: 2029611-3
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  • 4
    Online Resource
    Online Resource
    Investigation of myocardial protection during pediatric CPB: Practical experience in 100 Chinese hospitals
    SAGE Publications ; 2022
    In:  Perfusion Vol. 37, No. 1 ( 2022-01), p. 5-13
    Details
    In: Perfusion, SAGE Publications, Vol. 37, No. 1 ( 2022-01), p. 5-13
    Abstract: Many measures have been proposed for myocardial protection in pediatric congenital heart surgeries, but little data is available for China. This study investigates myocardial protection strategies in pediatric cardiopulmonary bypass (CPB) throughout China. Online questionnaires were delivered to 100 hospitals in 27 provinces. The number of yearly on-pump pediatric cardiovascular surgeries in these hospitals varied greatly. About 91.0% of respondents believe that each surgery should have at least two perfusionists, while only 64.0% of hospitals actually met this requirement. For pediatric patients, crystalloid cardioplegia was more prevalent than blood-based cardioplegia. Histidine-tryptophan-ketoglutarate solution and St. Thomas crystalloid solution were dominant among crystalloid cardioplegia. Del Nido cardioplegia and St. Thomas blood-based cardioplegia ranked the top two in the popularity of blood-based cardioplegia. Dosages varied among different kinds of cardioplegia. In the choice of different cardioplegia, perfusionists mainly focused on myocardial protective effect and cost. Hypothermia of cardioplegia solution was maintained by ice buckets in 3/4 of the hospitals in this survey. In conclusion, the essence of myocardial protection management during pediatric CPB was cardiac arrest induced by cardioplegia under systemic hypothermia. However, there is no uniform standard for the type of cardioplegia, or dosages. Therefore, well-designed multicenter randomized controlled trials are warranted to provide tangible evidence for myocardial protection of cardioplegia in pediatric CPB.
    Type of Medium: Online Resource
    ISSN: 0267-6591 , 1477-111X
    URL: Article
    DOI: 10.1177/0267659120983107
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2022
    detail.hit.zdb_id: 2029611-3
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