1、Polyethyleneimine‐Modified Cellulose Nanofibers for Toughening Acid

Weak interfacial bonding between the two phases limited the toughening efficacy of carboxylated cellulose nanofibers (CNF-C) on epoxy resin. To address this interfacial incompatibility, surface modification of CNF-C was implemented through polyethyleneimine (PEI) functionalization.

2、Efficient Adsorption of Dyes Using Polyethyleneimine

Herein, we designed a polyethyleneimine (PEI)-modified NH 2 -MIL-101 (Al) composite (PEI@NH 2 -MIL-101 (Al)). This composite showed excellent dye removal performance of methyl orange (MO, 89.4%) and Direct Red 80 (DR80, 99.8%).

3、Polyethyleneimine modified ammonium polyphosphate toward polyamine

Polyethyleneimine modified ammonium polyphosphate toward polyamine-hardener for epoxy resin: Thermal stability, flame retardance and smoke suppression Yi Tan , Zhu-Bao Shao, Lei-Xiao Yu , Ying-Jun Xu, Wen-Hui Rao , Li Chen, Yu-Zhong Wang Show more Add to Mendeley

4、Gallic acid—polyethyleneimine modified UHMWPE fibers with epoxy resin

The results showed that the surface active functional groups of the modified UHMWPE fibers increased, and the bending properties and interfacial shear strength of the composites with epoxy resin were significantly improved, with the bending strength and interfacial shear strength increased by 33.1% and 45.9%, respectively.

5、Polyethyleneimine

Weak interfacial bonding between the two phases limited the toughening efficacy of carboxylated cellulose nanofibers (CNF-C) on epoxy resin. To address this interfacial incompatibility, surface modification of CNF-C was implemented through polyethyleneimine (PEI) functionalization.

Polyethylenimine (PEI)

A highly efficient solid-amine adsorbent with excellent CO2 capacity from flue gas was successfully prepared using polyethyleneimine (PEI)-impregnated resin HPD450 in this study.

CO2 adsorption performance of polyethyleneimine

A series of solid amine adsorbents were prepared by the template method with ion-exchange resin (D001) as the carrier and polyethyleneimine (PEI) as the modifier.

Efficient continuous adsorption of anionic dyes by polyethyleneimine

This study describes the synthesis of polyethyleneimine-based novel hyper-cross-linked resin (PEI-MA) for the adsorptive removal of anionic dyes, AY, CR, and EBT, from an aqueous solution.

Polyethylenimine

Polyethylenimine (PEI)-impregnated resins with high CO 2 adsorption capacity were successfully prepared in this study. The nonpolar resin HP20 was suitable for PEI loading to achieve high CO 2 adsorption, and the optimal PEI loading was 50 wt %.

Efficient Adsorption of Dyes Using Polyethyleneimine

To achieve the above purpose, we designed a simple and effective method to synthesize a modified MOF composite and investigate the dye adsorption performance. Then, the dye-adsorbed MOF composite can be used as a flame retardant.

Abstract: Polyethyleneimine (PEI) is a synthetic polymer material with excellent properties, widely used in fields such as electronics, aerospace, automotive, and biomedical engineering. This paper primarily explores the preparation methods, performance characteristics, and applications of PEI-modified resins across various domains.

Keywords: Polyethyleneimine; Modified Resin; Preparation Methods; Performance Characteristics; Application Fields

1. Introduction Polyethyleneimine (PEI) is a polymer formed by the polymerization of nitrogen atoms and vinyl groups. Due to its superior mechanical properties, electrical insulation, and chemical stability, PEI is extensively used in the electronics field, such as in semiconductor device encapsulation materials and conductive coatings. PEI also has limitations, including brittleness and hygroscopicity. modifying PEI to improve its comprehensive properties is of significant importance.

2. Preparation Methods for PEI-Modified Resins 2.1 Solution Polymerization Method Solution polymerization is one of the most common methods for PEI modification. PEI is first dissolved in an organic solvent, followed by the addition of an initiator to trigger the polymerization reaction. This method allows precise control over the content and distribution of PEI, resulting in high-quality modified resins.

2.2 Melt Copolymerization Method Melt copolymerization involves blending PEI with other polymers (e.g., polypropylene) and undergoing melt copolymerization. This approach achieves uniform dispersion of PEI particles, enhancing the performance of the modified resin. Additionally, the PEI content can be adjusted by varying the ratio of copolymers.

2.3 Interfacial Polymerization Method Interfacial polymerization occurs at the interface between two immiscible polymers, where PEI polymerization takes place. This method enables highly dispersed PEI particles, improving the resin’s performance. The PEI content can also be regulated by adjusting the interfacial polymerization conditions.

3. Performance Characteristics of PEI-Modified Resins 3.1 Superior Mechanical Properties PEI-modified resins exhibit high tensile strength, tensile modulus, and elongation at break, enabling exceptional performance in environments subject to external forces.

3.2 Excellent Electrical Insulation PEI-modified resins maintain stable electrical properties under high voltage, making them suitable for encapsulating high-voltage electrical components and electronic devices.

3.3 Outstanding Chemical Stability These resins demonstrate strong resistance to chemicals, withstand corrosion from acids, alkalis, salts, and other environmental factors, thereby extending their service life.

3.4 Good Thermal Stability PEI-modified resins retain their physical properties at high temperatures, making them ideal for applications in harsh thermal environments.

4. Applications of PEI-Modified Resins 4.1 Electronics Field PEI-modified resins are used in electronics for semiconductor device encapsulation, conductive coatings, and other applications. These uses not only enhance the comprehensive performance of PEI-modified resins but also expand their application scope.

4.2 Aerospace Field In aerospace, PEI-modified resins are employed in critical components such as aircraft engine parts and fuel systems. Their high heat resistance and corrosion resistance meet the demanding requirements of this field.

4.3 Automotive Field In automobiles, these resins are utilized for manufacturing car bodies, interior parts, and other components. Their wear resistance, impact resistance, and UV resistance make them well-suited for automotive applications.

4.4 Biomedical Field In biomedical engineering, PEI-modified resins are used to produce artificial joints, vascular stents, and other medical devices. Their biocompatibility and biodegradability fulfill the stringent requirements of this sector.

PEI-modified resins possess excellent mechanical properties, electrical insulation, chemical stability, and thermal stability. These advantages enable their widespread application potential in electronics, aerospace, automotive, and biomedical fields. further research is needed to fully optimize their performance and reduce costs.