CN
Search Within
bio-based polyether polyol
应用筛选条件
关键词:'bio-based polyether polyol'
显示 1-17 共 17 条结果 关于 "bio-based polyether polyol" 范围 论文
Roberto Morales-Cerrada et al.
Polymers, 13(8) (2021-05-01)
The trend towards the utilization of bioresources for the manufacturing of polymers has led industry players to bring to the market new monomers. In this work, we studied 3 polyisocyanates and 2 polyols with high renewable carbon contents, namely L-lysine
Maresa Sonnabend et al.
Polymers, 13(12) (2021-07-03)
Due to reasons of sustainability and conservation of resources, polyurethane (PU)-based systems with preferably neutral carbon footprints are in increased focus of research and development. The proper design and development of bio-based polyols are of particular interest since such polyols
Paulina Kosmela et al.
Materials (Basel, Switzerland), 13(5) (2020-03-14)
The paper describes the preparation and characterization of rigid polyurethane-polyisocyanurate (PUR-PIR) foams obtained with biopolyol synthesized in the process of liquefaction of biomass from the Baltic Sea. The obtained foams differed in the content of biopolyol in polyol mixture (0-30
Aiga Ivdre et al.
Polymers, 12(4) (2020-04-01)
Developing polyols derived from natural sources and recycling materials attracts great interest for use in replacing petroleum-based polyols in polyurethane production. In this study, rigid polyurethane (PUR) foams with various isocyanate indices were obtained from polyols based on rapeseed oil
Adam Olszewski et al.
Materials (Basel, Switzerland), 13(9) (2020-05-03)
This article describes how new bio-based polyol during the liquefaction process can be obtained. Selected polyol was tested in the production of polyurethane resins. Moreover, this research describes the process of manufacturing polyurethane materials and the impact of two different
Sylwia Członka et al.
Materials (Basel, Switzerland), 13(15) (2020-07-28)
Rigid polyurethane (PUR) foams produced from walnut shells-derived polyol (20 wt.%) were successfully reinforced with 2 wt.% of non-treated, acetylated, and silanized walnut shells (WS). The impact of non-treated and chemically-treated WS on the morphology, mechanical, and thermal characteristics of
Chih Hao Chang et al.
Bio-medical materials and engineering, 22(6), 373-382 (2012-11-02)
Segmented polyurethane (SPU) materials based on different soft-segment component (PPG, PTMO and PBA) and various length of soft-segment (molecular weight of PBA: 500, 700 and 1000) were synthesized in this research. The soft-segment components were synthesized from polyether-polyols (PPG and
Yuqiang Qian et al.
ACS applied materials & interfaces, 3(9), 3709-3717 (2011-08-23)
Natural vermiculite was modified by cation exchange with long-chain quaternary alkylammonium salts and then dispersed in polyether-based polyols with different structures and ethylene oxide/propylene oxide ratios. The dispersions were evaluated by X-ray scattering and rheology. In all polyol dispersions tested
Gabriel Kiss et al.
Polymers, 12(7) (2020-07-16)
Ester polyurethane (PU) foam waste was reacted at atmospheric pressure in an autoclave and using microwaves with diethylene glycol (DEG) at different PU/DEG ratios in the presence of diethanolamine as a catalyst to find the glycolysis conditions that allow for
Smritilekha Bera et al.
Journal of medicinal chemistry, 53(9), 3626-3631 (2010-04-09)
Cationic amphiphiles containing multiple positively charged amino functions define a structurally diverse class of antibacterials with broad-spectrum activity and different modes of action. Oligocationic amphiphiles have been used as antibiotics to treat infections and as antiseptics and disinfectants for decades
Hyo-Jin Kim et al.
Journal of biomaterials applications, 29(3), 454-464 (2014-05-09)
Bio-based high elastic polyurethanes were prepared from hexamethylene diisocyanate and various ratios of isosorbide to poly(tetramethylene glycol) as a diol by a simple one-shot bulk polymerization without a catalyst. Successful synthesis of the polyurethanes was confirmed by Fourier transform-infrared spectroscopy
Arnis Abolins et al.
Materials (Basel, Switzerland), 14(4) (2021-03-07)
A second-generation bio-based feedstock-tall oil fatty acids-was epoxidised via two pathways. Oxirane rings were introduced into the fatty acid carbon backbone using a heterogeneous epoxidation catalyst-ion exchange resin Amberlite IR-120 H or enzyme catalyst Candida antarctica lipase B under the
Cytotoxicity and mechanical behavior of chitin-bentonite clay based polyurethane bio-nanocomposites.
Khalid Mahmood Zia et al.
International journal of biological macromolecules, 49(5), 1131-1136 (2011-09-29)
Chitin based polyurethane bio-nanocomposites (PUBNC) were prepared using chitin, Delite HPS bentonite nanoclay enriched in montmorillonite (MMT), 4,4'-diphenylmethane diisocyanate (MDI) and polycaprolactone polyol CAPA 231 (3000 g/mol(-1)). The prepolymers having different concentration of Delite HPS bentonite nanoclay were extended with
Thomas J Farmer et al.
International journal of molecular sciences, 16(7), 14912-14932 (2015-07-07)
Utilisation of bio-derived platform molecules in polymer synthesis has advantages which are, broadly, twofold; to digress from crude oil dependence of the polymer industry and secondly to reduce the environmental impact of the polymer synthesis through the inherent functionality of
A C W Tan et al.
Biopolymers, 109(2) (2017-11-22)
In the current study, we present the synthesis of novel low cost bio-polyurethane compositions with variable mechanical properties based on castor oil and glycerol for biomedical applications. A detailed investigation of the physicochemical properties of the polymer was carried out
Arti Vashist et al.
Frontiers in bioengineering and biotechnology, 8, 315-315 (2020-05-20)
The emerging field of theranostics for advanced healthcare has raised the demand for effective and safe delivery systems consisting of therapeutics and diagnostics agents in a single monarchy. This requires the development of multi-functional bio-polymeric systems for efficient image-guided therapeutics.
Ferdinando De Luca Bossa et al.
Materials (Basel, Switzerland), 13(1) (2020-01-18)
Nowadays, the chemical industry is looking for sustainable chemicals to synthesize nanocomposite bio-based polyurethane foams, PUs, with the aim to replace the conventional petrochemical precursors. Some possibilities to increase the environmental sustainability in the synthesis of nanocomposite PUs include the
1/1