Waterborne polyurethanes from self-catalytic tartaric acid-based polyols for environmentally-friendly sizing agents

2021 ◽  
pp. 100849
Author(s):  
Shengtao Dai ◽  
Peikun Li ◽  
Xuyang Li ◽  
Chen Ning ◽  
Lingqiang Kong ◽  
...  
Keyword(s):  
Tartaric Acid ◽  
Environmentally Friendly ◽  
Waterborne Polyurethanes ◽  
Sizing Agents

Waterborne polyurethanes from castor oil-based polyols for next generation of environmentally-friendly hair-styling agents

2020 ◽  
Vol 142 ◽  
pp. 105588 ◽  
Author(s):  
Yi Zhang ◽  
Wenbo Zhang ◽  
Xiao Wang ◽  
Qianwen Dong ◽  
Xueyi Zeng ◽  
...  
Keyword(s):  
Castor Oil ◽  
Environmentally Friendly ◽  
Next Generation ◽  
Waterborne Polyurethanes ◽  
Hair Styling

Thermosetting polyurethanes prepared with the aid of a fully bio-based emulsifier with high bio-content, high solid content, and superior mechanical properties

2019 ◽  
Vol 21 (3) ◽  
pp. 526-537 ◽  
Author(s):  
Lingxiao Liu ◽  
Jingyi Lu ◽  
Yi Zhang ◽  
Haiyan Liang ◽  
Dunsheng Liang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Environmentally Friendly ◽  
Solid Content ◽  
Synthetic Route ◽  
High Solid Content ◽  
High Solid ◽  
Waterborne Polyurethanes ◽  
Superior Mechanical Properties

The green synthetic route developed in this study offers a new platform for environmentally friendly emulsifiers for waterborne polyurethanes.

Modulating the microstructure of waterborne polyurethanes for preparation of environmentally friendly nanocomposites by incorporating cellulose nanocrystals

Cellulose ◽  
2016 ◽  
Vol 24 (2) ◽  
pp. 823-834 ◽  
Author(s):  
Arantzazu Santamaria-Echart ◽  
Lorena Ugarte ◽  
Aitor Arbelaiz ◽  
Filomena Barreiro ◽  
Maria Angeles Corcuera ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Environmentally Friendly ◽  
Waterborne Polyurethanes

Are BMP Criteria Really Environmentally Friendly

WRPMD'99 ◽  
1999 ◽  
Author(s):  
Larry A. Roesner ◽  
Robert W. Brashear
Keyword(s):  
Environmentally Friendly

Environmentally Friendly Preparation of Magnetic Composites Featuring Proteolytic Properties

INEOS OPEN ◽  
2020 ◽  
Author(s):  
N. A. Samoilova ◽  
Keyword(s):  
Enzyme Immobilization ◽  
Maleic Acid ◽  
Environmentally Friendly ◽  
Synthetic Polymer ◽  
Magnetic Composites ◽  
Interpolyelectrolyte Complex ◽  
Hydrolysis Rates ◽  
Poly Ethylene ◽  
Noncovalent Binding

The enzyme-containing magnetic composites are presented. The magnetic matrix for enzyme immobilization is obtained by sequential application of an amine-containing polysaccharide—chitosan and a synthetic polymer—poly(ethylene-alt-maleic acid) to the magnetite microparticles to form the interpolyelectrolyte complex shell. Then, the enzyme (trypsin) is immobilized by covalent or noncovalent binding. Thus, the suggested composites can be readily obtained in the environmentally friendly manner. The enzyme capacity of the resulting composites reaches 28.0–32.6 mg/g. The maximum hydrolysis rates of the H-Val-Leu-Lys-pNA substrate provided by these composites range within 0.60·10–7–0.77·10–7 M/min.

Influence of Polymer Charge, Temperature, and Surfactants on Surface Sizing of Liner and Greaseproof Paper With Hydrophobically Modified Starch

TAPPI Journal ◽  
2009 ◽  
Vol 8 (2) ◽  
pp. 33-38 ◽  
Author(s):  
ANNA JONHED ◽  
LARS JÄRNSTRÖM
Keyword(s):  
Phase Separation ◽  
Contact Angles ◽  
Low Ph ◽  
Hydrophobically Modified ◽  
Paper Sizing ◽  
Surface Sizing ◽  
Separation Temperature ◽  
Hydrophobic Nature ◽  
Sizing Agents ◽  
Charge Temperature

The aim of this study was to investigate the properties of hydrophobically modified (HM) quaterna-ry ammonium starch ethers for paper sizing. These starches possess temperature-responsive properties; that is, gelation or phase separation occurs at a certain temperature upon cooling. This insolubility of the HM starches in water at room temperature improved their performance as sizing agents. The contact angles for water on sized liner were substantially larger than on unsized liner. When the application temperature was well above the critical phase-separation temperature, larger contact angles were obtained for liner independently of pH compared with those at the lower application temperature. Cobb60 values for liner decreased upon surface sizing, with a low pH and high application temperature giving lower water penetration. Contact angles on greaseproof paper decreased upon sur-face sizing as compared to unsized greaseproof paper, independently of pH and temperature. Greaseproof paper showed no great difference between unsized substrates and substrates sized with HM starch at different pH. This is probably due to the already hydrophobic nature of greaseproof paper. However, the Cobb60 values increased at low pH and low application temperature. Surfactants were added to investigate how they affect the sized surface. Addition of surfactant reduces the contact angles, in spite of indications of complex formation.

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