scholarly journals Synthesis and Properties of Waterborne Polyurethane (WBPU)/Modified Lignin Amine (MLA) Adhesive: A Promising Adhesive Material

Polymers ◽  
2016 ◽  
Vol 8 (9) ◽  
pp. 318 ◽  
Author(s):  
Mohammad Rahman ◽  
Md. Zahir ◽  
Han Kim
Keyword(s):  
Waterborne Polyurethane ◽  
Adhesive Material ◽  
Lignin Amine ◽  
Modified Lignin

scholarly journals Synthesis and Properties of Waterborne Polyurethane (WBPU)/Modified Lignin Amine (MLA) Adhesive: A Promising Adhesive Material

2016 ◽  
Author(s):  
Mohammad Mizanur Rahman ◽  
Md. Hasan Zahir ◽  
Han Do Kim
Keyword(s):  
Adhesive Strength ◽  
Weather Conditions ◽  
Waterborne Polyurethane ◽  
Chain Extender ◽  
Mixing Process ◽  
Adhesive Material ◽  
Lignin Amine ◽  
A Chain ◽  
Modified Lignin ◽  
Adhesive Materials

A series of waterborne polyurethane (WBPU)/modified lignin amine (MLA) adhesives was prepared using modified lignin amine (MLA) as a chain extender by a prepolymer mixing process. A successful Mannich reaction was achieved during the synthesis of MLA by reacting lignin with bis(3-aminopropyl)amine. Higher tensile strength, Young’s modulus and thermal stability were recorded for WBPU/MLA adhesives with higher MLA contents. The WBPU/MLA adhesive materials were used to coat PVC substrates. The adhesive strength increased with increasing MLA content. More importantly, the MLA also enhanced the WBPU/MLA coating in terms of adhesive strength at moderately high temperatures as well as under natural weather exposed conditions. The adhesive strength was essentially unaffected with 6.48 mole% MLA in the WBPU/MLA coating after exposure to natural weather conditions for 180 days.

Synthesis of a biobased waterborne polyurethane with epichlorohydrin-modified lignin

2019 ◽  
Vol 40 (10) ◽  
pp. 1499-1506 ◽  
Author(s):  
Longfang Ren ◽  
Yongxia Zhao ◽  
Taotao Qiang ◽  
Qiqi He
Keyword(s):  
Waterborne Polyurethane ◽  
Modified Lignin

Synthesis of Lignin Amine Asphalt Emulsifier and its Investigation by Online FTIR Spectrophotometry

2014 ◽  
Vol 909 ◽  
pp. 72-76 ◽  
Author(s):  
Xiang Tao ◽  
Lai Shun Shi ◽  
Mei Jie Sun ◽  
Na Li
Keyword(s):  
Storage Stability ◽  
Synthesis Process ◽  
Good Surface ◽  
Optimum Reaction ◽  
Ftir Technique ◽  
Lignin Amine ◽  
Online Ftir ◽  
Ftir Spectrophotometry ◽  
Modified Lignin ◽  
Optimum Reaction Condition

A novel cationic asphalt emulsifier of tetraethylenepentamine/formaldehyde modified lignin amine was synthesized by alkali lignin, tetraethylenepentamine and formaldehyde. The optimum reaction condition was obtained. The structure of the emulsifier was identified by FTIR. The synthesis process was monitored by online FTIR technique. Based upon the experimental data, a plausible reaction mechanism was proposed for the reaction. The target product has good surface activity and satisfactory emulsification effect. The prepared bituminous emulsion showed higher storage stability. The emulsifier belongs to slow-set asphalt emulsifier.

Lignin-Containing Photoactive Resins for 3D Printing by Stereolithography

2018 ◽  
Author(s):  
Jordan T. Sutton ◽  
Kalavathy Rajan ◽  
David P. Harper ◽  
Stephen Chmely
Keyword(s):  
Additive Manufacturing ◽  
New Products ◽  
High Surface ◽  
Fold Increase ◽  
Print Quality ◽  
Renewable Materials ◽  
Lignin Concentration ◽  
Environmentally Sustainable ◽  
Manufacturing Applications ◽  
Modified Lignin

Generating compatible and competitive materials that are environmentally sustainable and economically viable is paramount for the success of additive manufacturing using renewable materials. We report the successful application of renewable, modified lignin-containing photopolymer resins in a commercial stereolithography system. Resins were fabricated within operable ranges for viscosity and cure properties, using up to 15% modified lignin by weight with the potential for higher amounts. A four-fold increase in ductility in cured parts with higher lignin concentration is noted as compared to commercial SLA resins. Excellent print quality was seen in modified lignin resins, with good layer fusion, high surface definition, and visual clarity. These materials can be used to generate new products for additive manufacturing applications and help fill vacant material property spaces, where ductility, sustainability, and application costs are critical.

Lignin-Containing Photoactive Resins for 3D Printing by Stereolithography

2018 ◽  
Author(s):  
Jordan T. Sutton ◽  
Kalavathy Rajan ◽  
David P. Harper ◽  
Stephen Chmely
Keyword(s):  
Additive Manufacturing ◽  
New Products ◽  
High Surface ◽  
Fold Increase ◽  
Print Quality ◽  
Renewable Materials ◽  
Lignin Concentration ◽  
Environmentally Sustainable ◽  
Manufacturing Applications ◽  
Modified Lignin

Generating compatible and competitive materials that are environmentally sustainable and economically viable is paramount for the success of additive manufacturing using renewable materials. We report the successful application of renewable, modified lignin-containing photopolymer resins in a commercial stereolithography system. Resins were fabricated within operable ranges for viscosity and cure properties, using up to 15% modified lignin by weight with the potential for higher amounts. A four-fold increase in ductility in cured parts with higher lignin concentration is noted as compared to commercial SLA resins. Excellent print quality was seen in modified lignin resins, with good layer fusion, high surface definition, and visual clarity. These materials can be used to generate new products for additive manufacturing applications and help fill vacant material property spaces, where ductility, sustainability, and application costs are critical.

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