Preparation of Polyetheramine‐Grafted Lignin and Its Application in UV‐Resistant Polyurea Coatings

Abstract

Lignin‐containing polyurea coating with good ultraviolet (UV) resistance is prepared by partially substituting polyetheramine with enzymatic hydrolysis lignin. Lignin is first grafted by polyetheramine chains via Mannich reaction, which improves its interfacial compatibility with polyurea matrix. The influences of the modified lignin on the chemical and corrosion resistance, UV‐aging property, and thermal stability of the polyurea coatings are studied. It is demonstrated that lignin‐containing polyurea coatings exhibit excellent UV‐aging properties. Aminating lignin with polyetheramine improves its dispersion in the polymer matrix. This work offers a novel method for the high‐value utilization of biomass lignin in anti‐UV polyurea coatings.

Strong, Reusable, and Self‐Healing Lignin‐Containing Polyurea Adhesives

“…Lignin was first modified with long chain polyetheramine (Jeffamine D2000) through Mannich reaction, [23] which introduced highly reactive amino groups as well as flexible long chain segments to lignin. The amino groups improved the reaction activity of lignin with isocyanate groups, the flexible polyether chain segments enhanced the interfacial compatibility between lignin and polyurea matrix.…”

Preparation of Renewable Thiol‐Yne “Click” Networks Based on Fractionated Lignin for Anticorrosive Protective Film Applications

“…Another example is the work of Fang et al., in which polyurea coatings containing up to 30% polyetheramine‐grafted lignin, exhibiting corrosion resistance and excellent UV‐aging properties were demonstrated. [ 14 ] Carlos de Haro et al described silanized lignin cross‐linked films by tetraethylorthosilicate. [ 12 ] In that study, the silanized lignin loading was very high, 95%, and the resulting cross‐linked, hydrophobic film showed good adhesion and corrosion inhibition properties on aluminum surfaces.…”

“…There are some state-of-the-art examples where lignin was incorporated in protective, anticorrosive coatings. Lignin can become part of the coating formulation in multiple ways, including being part of the cross-linked thermoset composition, [12][13][14][15] as an additive in a thermoplastic system, [16,17] deposited on the metal surface as such, [18,19] or lignin can be used as an anticorrosive additive. [20] In this research, lignin is incorporated in the coating formulation as a component of the thermoset resin, and for that reason, only the examples of works where lignin is a part of the thermoset resin are further described.…”

Higher Fatty Acid-Based CO2-Controllable Dual-Circulation Approach for Oil Recovery

“…The polyetheramine has been diffusely used in the industrial production field as a new type of material, for instance, for preparing UV-resistant polyurea coatings. 35 The D230 was selected as the hydrophilic amine inner loop because D230 has polyethyleneoxide units that provide appropriate hydrophilicity, 36 as well as the amine group with CO 2 switching response. Meanwhile, the environmental protection 37 of D230 was also taken into consideration, and its low toxicity, ecofriendliness, biodegradability, and cost-effective properties distinguished it from the above small-molecule amines.…”