Kim, Seung-Il Moon, Ji-Yun Hyeong, Seok-Ki Ghods, Soheil Kim, Jin-Su Choi, Jun-Hui Park, Dong Seop Bae, Sukang Cho, Sung Ho Lee, Seoung-Ki Lee, Jae-Hyun 2024-04-18T05:30:33Z 2024-04-18T05:30:33Z 2024-04-18 2024-03 https://pubs.kist.re.kr/handle/201004/149668 Semi-infinite single-atom-thick graphene is an ideal reinforcing material that can simultaneously improve the mechanical, electrical, and thermal properties of matrix. Here, we present a float-stacking strategy to accurately align the monolayer graphene reinforcement in polymer matrix. We float graphene-poly(methylmethacrylate) (PMMA) membrane (GPM) at the water-air interface, and wind-up layer-by-layer by roller. During the stacking process, the inherent water meniscus continuously induces web tension of the GPM, suppressing wrinkle and folding generation. Moreover, rolling-up and hot-rolling mill process above the glass transition temperature of PMMA induces conformal contact between each layer. This allows for pre-tension of the composite, maximizing its reinforcing efficiency. The number and spacing of the embedded graphene fillers are precisely controlled. Notably, we accurately align 100 layers of monolayer graphene in a PMMA matrix with the same intervals to achieve a specific strength of about 118.5 MPa g-1 cm3, which is higher than that of lightweight Al alloy, and a thermal conductivity of about 4.00 W m-1 K-1, which is increased by about 2,000 %, compared to the PMMA film. To maximize composite reinforcing efficiency, a semi-infinite reinforcement should be aligned in the matrix. Here, the authors report a float-stacking strategy for graphene-PMMA laminate with precisely aligned monolayer graphene in a polymer matrix. English Nature Publishing Group Float-stacked graphene-PMMA laminate Article 10.1038/s41467-024-46502-6 1 Nature Communications, v.15, no.1 Nature Communications 15 1 Y scie scopus 001183186200021 2-s2.0-85187159380 Multidisciplinary Sciences Science & Technology - Other Topics Article POLY METHYL-METHACRYLATE THERMAL-CONDUCTIVITY MECHANICAL-PROPERTIES PHYSICAL-PROPERTIES OXIDE NANOCOMPOSITES COMPOSITES STRENGTH