Liquid exfoliated, hydroxylated functionalized hexagonal boron nitride nanosheets (h-BNNSs-OH) are prepared for improved dispersion in polymers. Polymer nanocomposites are fabricated using (0–0.03 V_f) hydroxyl (OH) functionalized and non-functionalized BNNSs with poly methyl methacrylate, PMMA, by solution mixing for comparative study. Mechanical properties of the composites are improved considerably. The maximum ultimate tensile strength of the functionalized BN/PMMA (0.003 V_f BN) reached to ~ 26 MPa as compared to non-functionalized composites maximum value of ~ 19 MPa while the base polymer value remained at ~ 15 MPa. The Young’s modulus enhanced as well from 1.45 GPa (PMMA) to 2.01 GPa and 2.19 GPa both for non-functionalized and functionalized composites respectively. The degree of reinforcement validated with the Halpin–Tsai Model is in close agreement for functionalized polymer nanocomposites. Structural and morphological characteristics are analyzed using X-ray Diffraction (XRD) and scanning electron microscopy (SEM) respectively, confirming the composites formation. The lateral dimension of the synthesized nanosheets is estimated with SEM as well. Dimensional analysis of nanosheets is carried out using atomic force microscopy (AFM). The estimated thickness of functionalized hBN flakes was around 5–10 nm. Fourier transform infra-red spectroscopy (FTIR) is used to confirm the presence of functional groups on h-BN. Differential scanning calorimeter (DSC) is used to study the polymer and nanosheets interactions.

制备液体剥离，羟基化的官能化六方氮化硼纳米片（h-BNNSs-OH），以改善在聚合物中的分散性。聚合物纳米复合材料是通过（0-0.03 V _f）羟基（OH）官能化和非官能化的BNNS与聚甲基丙烯酸甲酯PMMA制备的，通过溶液混合进行比较研究。复合材料的机械性能大大提高。功能化BN / PMMA的最大极限拉伸强度（0.003 V _fBN）达到〜26 MPa，而非官能化复合材料的最大值约为〜19 MPa，而基础聚合物的值保持在〜15 MPa。对于未官能化和官能化的复合材料，杨氏模量也分别从1.45 GPa（PMMA）提高到2.01 GPa和2.19 GPa。用Halpin-Tsai模型验证的增强程度与功能化的聚合物纳米复合材料密切相关。分别使用X射线衍射（XRD）和扫描电子显微镜（SEM）分析结构和形态特征，从而确认了复合物的形成。合成的纳米片的横向尺寸也用SEM估计。纳米片的尺寸分析是使用原子力显微镜（AFM）进行的。功能化hBN薄片的估计厚度约为5-10 nm。傅里叶变换红外光谱（FTIR）用于确认h-BN上官能团的存在。差示扫描量热仪（DSC）用于研究聚合物和纳米片的相互作用。