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- Su, Zhibin, et al.
(författare)
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Preparation and properties of aminated graphene fiber incorporated modified asphalt
- 2019
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Ingår i: Construction and Building Materials. - : Elsevier. - 0950-0618 .- 1879-0526. ; 229
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Tidskriftsartikel (refereegranskat)abstract
- The inert nature of polyacrylonitrile (PAN) fiber limits the development of fiber asphalt pavement, which can however be tackled by modifying PAN. In this paper, PAN was modified via self-polymerization of dopamine and covalent grafting of aminated graphene, which were in turn used to prepare three kinds of modified asphalt. Dynamic shear rheometer (DSR) tests showed that the aminated graphene modified fiber based asphalt had better viscoelasticity and resistance to permanent deformation than the pristine fiber added asphalt. 3% NH2-GNPs/D-PAN modified asphalt exhibited about 8% higher G* than 3% PAN modified asphalt at a fixed shear frequency. The aminated graphene modified asphalt exhibited enhanced hydrophobicity, adhesion work and water resistance (increased by 14%) than unmodified PAN fiber added asphalt as determined via contact angle measurement. Trabecular bending test and water-immersed Marshall stability test showed that NH2-GNPs/D-PAN incorporated modified asphalt mixture realized the best cracking resistance at low temperature and water damage resistance, which is consistent with the result of DSR and contact angle tests. FT-IR characterization confirmed the successful grafting of amino group onto graphene oxide and that graphite oxide was reduced to graphene. The fiber structure and successful grafting of aminated graphene onto the fiber surface in the PAN modified asphalt was further characterized and confirmed by SEM and AFM.
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- Bakker, K, et al.
(författare)
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The 2015 IWGDF guidance documents on prevention and management of foot problems in diabetes: development of an evidence-based global consensus.
- 2016
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Ingår i: Diabetes/Metabolism Research & Reviews. - : Wiley. - 1520-7552. ; 32:Supplement S1, s. 2-6
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Tidskriftsartikel (refereegranskat)abstract
- Foot problems complicating diabetes are a source of major patient suffering and societal costs. Investing in evidence-based, internationally appropriate diabetic foot care guidance is likely among the most cost-effective forms of healthcare expenditure, provided it is goal-focused and properly implemented. The International Working Group on the Diabetic Foot (IWGDF) has been publishing and updating international Practical Guidelines since 1999. The 2015 updates are based on systematic reviews of the literature, and recommendations are formulated using the Grading of Recommendations Assessment Development and Evaluation (GRADE) system. As such, we changed the name from "Practical Guidelines" to "Guidance". In this article we describe the development of the 2015 IWGDF Guidance documents on prevention and management of foot problems in diabetes. This Guidance consists of five documents, prepared by five working groups of international experts. These documents provide guidance related to foot complications in persons with diabetes on: prevention; footwear and offloading; peripheral artery disease; infections; and, wound healing interventions. Based on these five documents, the IWGDF Editorial Board produced a summary guidance for daily practice. The resultant of this process, after review by the Editorial Board and by international IWGDF members of all documents, is an evidence-based global consensus on prevention and management of foot problems in diabetes. Plans are already under way to implement this Guidance. We believe that following the recommendations of the 2015 IWGDF Guidance will almost certainly result in improved management of foot problems in persons with diabetes and a subsequent worldwide reduction in the tragedies caused by these foot problems. This article is protected by copyright. All rights reserved.
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