Degradation Behaviour and Kinetics of UV Cured Epoxidised Soybean Oil Derivatives

2011 ◽  
Vol 230-232 ◽  
pp. 94-98 ◽  
Author(s):  
Mohammad Rahmah ◽  
Syuhaimi Ab.Rahman Mohammad ◽  
Mohamed Shaktur Khaled ◽  
Nawi Norwimie ◽  
Faiza Mohd Ahmad
Keyword(s):  
Renewable Resources ◽  
Epoxy Resins ◽  
Raw Materials ◽  
High Price ◽  
Degradation Behaviour ◽  
Uv Curable ◽  
Sustainable Resources ◽  
Oil Derivatives ◽  
Uv Curable Resin ◽  
Kinetics Of

Green resins based from sustainable resources are a requirement nowadays to replace non environmental coatings. Low (VOC) content epoxy which competes with conventional well established coating and high price could be derived from oil. UV curable resin is typically low VOC systems and offer advantages of rapid ambient cross linking and more energy efficient. Epoxy resins must have fast curing and low shrinkage upon cure which will give advantages to devices performance but epoxy resins are expensive and hence renewable resources from vegetable or non food oil can be used as raw materials.

scholarly journals Kinetics of biomass low-temperature pyrolysis by coats–redfern method

2018 ◽  
Vol 194 ◽  
pp. 01058 ◽  
Author(s):  
Dariga Altynbaeva ◽  
Alexander Astafev ◽  
Roman Tabakaev
Keyword(s):  
Renewable Resources ◽  
Thermal Processing ◽  
Power Plants ◽  
Negative Impact ◽  
Raw Materials ◽  
Operating Costs ◽  
Kinetics Of Decomposition ◽  
The World ◽  
Low Temperature Pyrolysis ◽  
Kinetics Of

Energy is one of the main sources of environmental pollution. In this regard, the world scientific community seeks to reduce its negative impact on human health and nature. To do this, some of the organic raw materials, which are fuel for power plants, are gradually replaced by renewable resources, in particular - biomass. The combustion of biomass by traditional methods is accompanied by high operating costs, which leads to the conclusion that it is necessary to process it into energy-valuable products. The development of one of the most promising such directions - thermal processing - requires studying the thermophysical properties of biomass and studying its kinetics of decomposition. The aim of this work is to estimate the activation energy of thermal decomposition of biomass by the method of Coats-Redfern.

scholarly journals Research and application progress of lignin-based composite membrane

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Youjing Li ◽  
Fen Li ◽  
Ying Yang ◽  
Baocai Ge ◽  
Fanzhu Meng
Keyword(s):  
Environmental Pollution ◽  
Raw Materials ◽  
Waste Product ◽  
Functional Materials ◽  
Polymeric Materials ◽  
Composite Membranes ◽  
Organic Polymer ◽  
Future Research ◽  
Sustainable Resources ◽  
New Perspective

Abstract In view of the serious environmental pollution, which is the greatest problem the world is facing, and the continuous consumption of raw materials, it is imminent to search for green and sustainable resources. Lignin is an organic polymer that exists widely in nature, and if it can be transformed from traditional low-value waste product with low range of applications to functional materials with high application prospects, it can be of great significance to alleviate environmental pollution and shortage of fossil resources. One of the functional applications of lignin involves its use to fabricate composite with other polymeric materials, which can then be used to prepare membrane materials. This review summarizes the recent research and application progress of combining lignin with polypropylene, polyvinyl alcohol, starch, cellulose, chitosan, and other polymeric materials to prepare composite membranes; and summarizes the future development direction of lignin-based composite membranes. We hope this review may provide a new perspective to the understanding of lignin-based composite membranes and a useful reference for future research.

scholarly journals Fast Fabrication of Nanostructured Films Using Nanocolloid Lithography and UV Soft Mold Roller Embossing: Effects of Processing Parameters

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 405
Author(s):  
Demei Lee ◽  
Ya-Ling Tang ◽  
Shih-Jung Liu
Keyword(s):  
Uv Light ◽  
Processing Parameters ◽  
Polymeric Films ◽  
Step Motor ◽  
Silicon Substrates ◽  
Casting Method ◽  
Uv Curable ◽  
Soft Mold ◽  
Uv Curable Resin ◽  
Spin Coater

We report the fabrication of nanofeatured polymeric films using nanosphere lithography and ultraviolet (UV) soft-mold roller embossing and show an illuminative example of their application to solar cells. To prepare the nanofeatured template, polystyrene nanocolloids of two distinct sizes (900 and 300 nm) were overlaid on silicon substrates using a spin coater. A lab-made soft-mold roller embossing device equipped with a UV light source was adopted. A casting method was employed to replicate the nanofeatured template onto polydimethylsiloxane, which was used as the soft mold. During the embossing procedure, the roller was driven by a step motor and compressed the UV-curable resin against the glass substrate to form the nanofeatured layer, which was subsequently cured by UV radiation. Polymer films with nanoscaled features were thus obtained. The influence of distinct processing variables on the reproducibility of the nanofeatured films was explored. The empirical outcomes demonstrate that UV soft-mold roller embossing offers a simple yet potent way of producing nanofeatured films.

scholarly journals Preparation of alkali-resistant PVDF membranes via immobilization of sodium lauryl sulfate (SDS) on surface

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Gongpu Wen ◽  
Kun Chen ◽  
Yanhong Zhang ◽  
Yue Zhou ◽  
Jun Pan ◽  
...  
Keyword(s):  
Sodium Lauryl Sulfate ◽  
Alkali Treatment ◽  
Membrane Surface ◽  
Alkali Resistance ◽  
Lauryl Sulfate ◽  
Uv Curable ◽  
Pvdf Membrane ◽  
Glycol Diacrylate ◽  
Polyester Acrylate ◽  
Uv Curable Resin

AbstractA novel strategy was proposed to fabricate alkali-resistant PVDF membrane via sodium lauryl sulfate (SDS) attached to the surface of membrane and immobilized by UV-curable polyester acrylate and tri(propylene glycol) diacrylate (TPGDA). The attached anionic surfactant, SDS, on the membrane surface can resist the alkali corrosion by NaOH, and the curing of the resin can immobilize the SDS on the membrane firmly. Due to the unique alkali resistance of SDS and resin formed, the UV-curable resin-modified PVDF membrane showed greatly enhanced alkali-resistant ability. Characterization of SEM and FTIR showed that polyester acrylate and TPGDA were cured successfully under the action of 1-hydroxycyclohexyl phenyl ketone (184) and ultraviolet light. Whiteness, differential scanning calorimeter and X-ray photoelectron spectrometer characterization showed that the modified PVDF membrane had a lower degree of dehydrofluorination than the pristine PVDF membrane after alkali treatment. Results of the detailed alkali-resistant analysis indicated that the F/C ratio of the UV-curable resin-modified PVDF membrane decreased by 2.6% after alkali treatment compared to pristine PVDF membrane decreased by 19.28%. The alkali-resistant performance was mainly attributed to the immobilized SDS. This study provided a facile and scalable method for designing alkali-resistant PVDF membrane, which shows a promising potential in the treatment of alkaline wastewater and alkaline-cleaning PVDF membrane.

Preparation and properties of star-shaped UV-curable polyester methacrylate resins with Low viscosity derived from renewable resources

2021 ◽  
Vol 157 ◽  
pp. 106324
Author(s):  
Zefei Yuan ◽  
Qiaochu Liu ◽  
Xueyi Pan ◽  
Jiao Wang ◽  
Ming Jin ◽  
...  
Keyword(s):  
Renewable Resources ◽  
Uv Curable ◽  
Low Viscosity

Self-Assembly of Monolayers of Submicron Sized Particles on Thin Liquid Films

2013 ◽  
Author(s):  
Shriram Pillapakkam ◽  
N. A. Musunuri ◽  
P. Singh
Keyword(s):  
Electric Field ◽  
Self Assembly ◽  
Uv Light ◽  
Capillary Forces ◽  
Liquid Films ◽  
Thin Liquid Films ◽  
Liquid Interfaces ◽  
Uv Curable ◽  
Particle Monolayer ◽  
Uv Curable Resin

In this paper, we present a technique for freezing monolayers of micron and sub-micron sized particles onto the surface of a flexible thin film after the self-assembly of a particle monolayer on fluid-liquid interfaces has been improved by the process we have developed where an electric field is applied in the direction normal to the interface. Particles smaller than about 10 microns do not self-assemble under the action of lateral capillary forces alone since capillary forces amongst them are small compared to Brownian forces. We have overcome this problem by applying an electric field in the direction normal to the interface which gives rise to dipoledipole and capillary forces which cause the particles to arrange in a triangular pattern. The technique involves assembling the monolayer on the interface between a UV-curable resin and another liquid by applying an electric field, and then curing the resin by applying UV light. The monolayer becomes embedded on the surface of the solidified resin film.

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