Jin, Jeong-Un Jang, Se Gyu Ahn, Seokhoon Kim, Dae-Yoon Hahn, Jae Ryang You, Nam -Ho 2024-01-19T09:31:56Z 2024-01-19T09:31:56Z 2023-04-27 2023-06 0169-4332 https://pubs.kist.re.kr/handle/201004/113704 In this study, polyamic acid salt-BNNTs (PAS-BNNTs) were prepared by noncovalently functionalizing water-soluble PAS with improved dispersion stability in organic solvents, and high compatibility with polyimide (PI) nanocomposites. We show that BNNTs functionalized with PAS have enhanced mechanical properties that are influenced by various loadings of PAS-BNNT/PI films through in situ polymerization. Compared with the pure PI film, the tensile strength and tensile modulus increased by about 20% and 37%, respectively. The proposed system also improved the coefficient of thermal expansion (CTE) from 52.6 to 45.7 ppm/oC. The enhanced mechanical properties of the PI nanocomposite were due to the interfacial bond strength enhanced by the reinforcing effect of PAS-BNNTs. Our study demonstrates the potential of PAS-BNNTs for preparing BNNT/PI nanocomposites with various structures. English Elsevier BV Noncovalently functionalized boron nitride nanotubes and polymer nanocomposites with water-soluble poly (amic acid) salt Article 10.1016/j.apsusc.2023.157082 1 Applied Surface Science, v.623 Applied Surface Science 623 N scie scopus 000966075700001 2-s2.0-85151006284 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article NANOMATERIALS MEMBRANES COVALENT FUNCTIONALIZATION SOLUBILIZATION CARBON NANOTUBES DISPERSION BNNT Noncovalent functionalization Nanocomposite Polyamic acid salt Mechanical properties