Two Birds with One Stone: Preparation of 4, 4-Diaminodiphenylmethane Functionalized GO@SiO2 with Mechanical Reinforcement and UV Shielding Properties and Its Application in Thermoplastic Polyurethane

• Published in: Polymers 2021-12, Vol.13 (23), p.4220
• Main Authors: Ding, Guoxin, Tai, Hongxu, Chen, Chuanxin, Sun, Chenfeng, Tang, Zhongfeng
• Format: Article
• Language: English
• Subjects: Chemical precipitation; Epoxy resins; Graphene; Hydrochloric acid; Low temperature; Mechanical properties; Methylene dianiline; Nanocomposites; Nanoparticles; Polymers; Polyurethane resins; Potassium; Scanning electron microscopy; Shielding; Silica; Silicon dioxide; Spectrum analysis; Substrates; Tensile strength; Urethane thermoplastic elastomers
• ISSN: 2073-4360; 2073-4360
• DOI: 10.3390/polym13234220

This study prepared 4,4-diaminodiphenylmethane (DDM)-functionalized graphene oxide (GO)@silica dioxide (SiO2) nano-composites through amidation reaction and low-temperature precipitation. The resulting modified GO, that was DDM−GO@SiO2. The study found that DDM−GO@SiO2 showed good dispersion and compatibility with thermoplastic polyurethane (TPU) substrates. Compared with pure TPU, the tensile strength of the TPU composites increased by 41% to 94.6 MPa at only 0.5 wt% DDM−GO@SiO2. In addition, even when a small amount of DDM−GO@SiO2 was added, the UV absorption of TPU composites increased significantly, TPU composites can achieve a UV shielding efficiency of 95.21% in the UV-A region. These results show that this type of material holds great promise for the preparation of functional coatings and film materials with high strength and weather resistance.