| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 594969 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2011 | 6 Pages |
The study was based on the yield of ligninphenol and the resins, morphology, temperature stability, water and ultraviolet resistance of the formulated resins, to describe a route to improve the potential for partially replacing phenol with rice hull acid-insoluble lignin in phenol–formaldehyde (PF) resin. In this route, phenolation and three-step polymerization were combined to increase the reactivity of rice hull acid-insoluble lignin. The formulated resin exhibited a better morphology and temperature stability compared with rice hull acid-insoluble lignin/PF (RPF) resin, and a better water and ultraviolet resistance compared with ligninphenol/PF resin prepared by phenolation and one-step polymerization (LPF1). The good properties of the product were attributed to the increased covalent interaction between PF resin and lignin. The strategy showed low-cost, simple operation, no pollution and high value.
Graphical abstractIt was found that phenolation of rice hull acid-insoluble lignin was combined with three-step polymerization of the resin to improve the reactivity of rice hull acid-insoluble lignin. Compared with rice hull acid-insoluble lignin/PF (RPF) resin, the formulated resin exhibited a better morphology and temperature stability. Compared with ligninphenol/PF resin prepared by phenolation and one-step polymerization (LPF1), the formulated resin showed better water and ultraviolet resistance.Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Phenolation and three-step polymerization were combined to increase the reactivity of rice hull acid-insoluble lignin. ► The yield of ligninphenol and the resins, morphology, temperature stability, water and ultraviolet resistance of the resins. ► Compared with rice hull acid-insoluble lignin/PF (RPF) resin, the formulated resin exhibited a better morphology and temperature stability. ► Compared with ligninphenol/PF resin prepared by phenolation and one-step polymerization (LPF1), the formulated resin showed better water and ultraviolet resistance. ► This research provides a new way to convert lignin into the value-added products.
