Preparation and Properties of Polyurethane Heat Insulating Building Materials Based on Lignin

Yan Ming Han; Te Fu Qin; Fu Xiang Chu

doi:10.4028/www.scientific.net/AMM.193-194.505

Paper Titles

Research on Method of Separating Autogenous Shrinkage from Thermal Deformation of Concrete at Early Ages
p.486

Research on Permeability of the Construction Generated Soil Serving as Filling Material for Consolidation Piles
p.492

The Technology on Producing the First Class Plywood Using Fast Growing Eucalyptus Timber
p.496

A Study on the Application of Rubber Crumb Modified Asphalt Mixture
p.500

Preparation and Properties of Polyurethane Heat Insulating Building Materials Based on Lignin
p.505

Hydration Dynamics of Portland Cement Studied by Magnetic Resonance
p.509

Use of CRT Funnel Glass as a Fine Aggregate in Self-Compacting Mortar: The Effect of Limestone on Pb Immobilization
p.513

Evaluation the Heat Environment for Using Phenolic Resin as Heat Insulation Construction Material
p.517

Research for Experiment of Molten Carbonate Fuel Cells Generation
p.522

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 193-194Preparation and Properties of Polyurethane Heat...

Preparation and Properties of Polyurethane Heat Insulating Building Materials Based on Lignin

Abstract:

The synthesis of polymer materials from renewable biomass resources has attracted lots of attention. In this study, lignin based polyurethane heat insulating building materials were prepared from isocyanate and lignin polyol. Lignin was modified by polyethylene glycol and glycerol with 0.6% acid at 120°C to obtain lignin polyol containing reactive hydroxyl groups, and then polyurethane foams were prepared by the reaction between the above lignin polyol and isocyanate. Hydroxyl value of lignin polyol, gel time, apparent activation energy for polymerization, impact strength and thermal conductivity of lignin based polyurethane were investigated. The results showed that: (1) hydroxyl value achieved 397.0 mgKOH/g at temperature 120°C; (2) the apparent activation energy for lignin based polyurethane polymerization was 34.12 kJ/mol; (3) compressive strength reached 291 kPa with lignin polyol content 30%; (4) thermal conductivity was 0.02517 W/mK when lignin polyol dosage was 30%. It was detected that lignin could be used to prepare polyurethane heat insulating building materials in replacement of petroleum polyols.