A fluorescent polyurethane foam based on rhodamine derivative as Fe( III ) sensor in pure water

2021 ◽  
Author(s):  
Yinyan Chen ◽  
Yiban Wu ◽  
Yifan Zhu ◽  
Saiqi Tian
Keyword(s):  
Polyurethane Foam ◽  
Pure Water ◽  
Rhodamine Derivative

scholarly journals Development of Rigid Polyurethane Foam (RPUF) for Imitation Wood Blown by Distilled Water and Cyclopentane (CP)

2018 ◽  
Vol 187 ◽  
pp. 02001
Author(s):  
Ratchanon Boonachathong ◽  
Bordin Kaewnok ◽  
Halim Widjaja ◽  
Suksun Amornraksa
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Polyurethane Foam ◽  
Pure Water ◽  
Surface Hardness ◽  
Distilled Water ◽  
Rigid Polyurethane Foam ◽  
Blowing Agent ◽  
Type D

Rigid polyurethane foam (RPUF) used for imitation wood is typically prepared by using 1-dichloro-1-fluoroethane (HCFC-141b) as a blowing agent. However, this chemical is a hydrofluorocarbon which severely causes ozone depletion to the atmosphere. In this study, a more environmental-friendly RPUF was prepared by using distilled water and cyclopentane (CP) as alternative blowing agent. Several properties of the prepared RPUF were investigated and measured such as density (kg/m3), surface hardness (Durometer, type D), and glass transition temperature (°C) using differential scanning calorimeter (DSC). It was found that when the amount of blowing agents decreased, the foam density was increased as well as the surface hardness. The developed RPUF with CP co-blown has higher surface hardness and glass transition temperature compare to pure water-blown RPUF at the same density (353 kg/m3). And the new RPUF produced has a good potential to substitute for a conventional RPUF.

Decoration of specific sites on freeze-fractured membranes

1978 ◽  
Vol 36 (2) ◽  
pp. 140-141
Author(s):  
H. Gross ◽  
H. Moor
Keyword(s):  
Pure Water ◽  
Freeze Fracture ◽  
Chemical Properties ◽  
Surface Forces ◽  
Sulfate Pentahydrate ◽  
Copper Sulfate Pentahydrate ◽  
Physico Chemical ◽  
Water Of Hydration ◽  
Small Container ◽  
Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

Actual procedures of diagnostics and treatments of crural venous ulcer in specialized German praxis and clinics

Phlebologie ◽  
2009 ◽  
Vol 38 (02) ◽  
pp. 77-82 ◽  
Author(s):  
P. Altmeyer ◽  
M. Stücker ◽  
S. Reich-Schupke
Keyword(s):  
Annual Meeting ◽  
Polyurethane Foam ◽  
Surgical Therapy ◽  
Compression Therapy ◽  
German Society ◽  
Venous Ulcer ◽  
Ulcus Cruris ◽  
Wound Dressings

Summary Background: To evaluate the implementation of the guidelines of the German Society of Phlebology for venous crural ulcer a survey was conducted during the annual meeting of the German Society of Phlebology 2008 in Bochum. Methods: All 719 medical participants got an anonymized questionnaire asking for supply of crural ulcer in their institution. Results: The recurrent 66 questionnaires (9.2%) were filled by colleagues from practice or hospital, mostly surgeons, dermatologists, phlebologists and vascular surgeons. As basic diagnostics vein doppler (56.1%), duplex (75.8%) or measurement of brachial-ankleindex (83.3%) were performed. Compression therapy is used in all institutions. Mainly used wound dressings are polyurethane foam dressings, alginates, hydrocolloids and silver dressings. About 2/3 conduct surgical therapy of ulcers. Conclusion: Supply of ulcus cruris by the participants of the annual meeting of the DGP corresponds mainly, but not in all aspects to the guidelines. Further efforts for a spread of the guidelines are necessary.

Interfacial interactions of polyurethane foam systems with inorganic fillers

2016 ◽  
Vol 2 (2) ◽  
pp. 49-53
Author(s):  
M. A. Ksenofontov ◽  
L. E. Ostrovskaya ◽  
E. Yu. Bobkova ◽  
V. S. Vasil`eva ◽  
T. G. Pavlukevich
Keyword(s):  
Polyurethane Foam ◽  
Interfacial Interactions ◽  
Inorganic Fillers

Characteristics of Negative Lightning Impulse Breakdown Voltage in Pure Water

2018 ◽  
Vol 138 (8) ◽  
pp. 441-448 ◽  
Author(s):  
Norimitsu Takamura ◽  
Nobutaka Araoka ◽  
Seiya Kamohara ◽  
Yuta Hino ◽  
Takuya Beppu ◽  
...  
Keyword(s):  
Breakdown Voltage ◽  
Pure Water ◽  
Lightning Impulse

Combined Buoyancy and Marangoni Convection in Pure Water

2002 ◽  
Vol 29 (5) ◽  
pp. 15 ◽  
Author(s):  
K. Sundaravadivelu ◽  
Prem Kumar Kandaswamy
Keyword(s):  
Marangoni Convection ◽  
Pure Water

Combined Buoyancy and Marangoni Convection in Pure Water

1999 ◽  
Vol 26 (5-6) ◽  
pp. 584-596 ◽  
Author(s):  
K. Sundaravadivelu ◽  
Prem Kumar Kandaswamy
Keyword(s):  
Marangoni Convection ◽  
Pure Water

PEMANFAATAN ABU PEMBAKARAN LIMBAH PADAT INDUSTRI CHLOR ALKALI SEBAGAI ADSORBEN PADA PENGOLAHAN LIMBAH CAIRNYA

2008 ◽  
pp. 19-25
Author(s):  
Sumingkrat Sumingkrat ◽  
Hartini Hartini ◽  
Adrian Yusuf
Keyword(s):  
Solid Waste ◽  
Pure Water

Lim bah industri klor alkali termasuk limbah 83 dari sumber yang spesifik. Pembakaran lirnbah padat industri kimia terpadu, yang memproduksi kaustik soda, VCM dan PVC akan menghasilkan abu. Limbah cair media proses polimerisasi PVC setelah pengendapan disebut spent pure water (SPW). Abu sisa pernbakaran, Solid Waste /ncenerator (SWI) ini dapat dimanfaatkan sebagai adsorben  untuk SPW. Sesuai dengan model Freundlich isoterm, SW! mempunyai daya adsorpsi terhadap biru metilen lebih baik dari pada karbon aktif, dan mampu menurunkan turbiditas SPW sampai sekitar 95%.

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