Although water supplies are prominently dependent on desalination technology, desalination plant facing severe issues of discharged brine concentrate. Membrane distillation crystallization is an emerging synergistic technology that resolves the issue of brine concentrate by recovering clean water and value-added minerals simultaneously. In the present study, properties of polyvinylidene fluoride (PVDF) membrane were modified by incorporation of exfoliated fillers of hexagonal boron nitride and polyethylene glycol. The changes in morphology, surface roughness, hydrophobicity, thermal stability, and chemical composition of the prepared membranes were evaluated by scanning electron microscopy, atomic force microscopy, contact angle, thermogravimetric analysis, Fourier-transform infrared spectroscopy, respectively. Membrane distillation crystallization experiments were conducted to observe the effect of modified membranes on the permeate flux and salts recovery at different feed temperatures. The results showed a significant improvement in the permeate flux with modified membranes compared with pure PVDF membrane. It was found that hexagonal boron nitride/polyethylene glycol200 incorporated PVDF membrane gave the higher permeate flux (3.41 kg/m² h for K₂SO₄ and 2.62 kg/m² h for KNO₃) at a temperature of 80 °C along with higher salts recovery than pure PVDF membranes. A 100 h long run test was conducted on modified membranes, which showed consistency in permeate flux with a marginal increase in conductivity.

尽管供水主要依赖于海水淡化技术，但海水淡化厂面临着排放浓盐水的严重问题。膜蒸馏结晶是一种新兴的协同技术，通过同时回收清洁水和增值矿物质来解决卤水浓缩问题。在本研究中，聚偏二氟乙烯 (PVDF) 膜的性能通过加入六方氮化硼和聚乙二醇的剥离填料来改性。分别通过扫描电子显微镜、原子力显微镜、接触角、热重分析、傅里叶变换红外光谱对制备的膜的形貌、表面粗糙度、疏水性、热稳定性和化学成分的变化进行了评价。进行膜蒸馏结晶实验以观察改性膜在不同进料温度下对渗透通量和盐回收率的影响。结果表明，与纯 PVDF 膜相比，改性膜的渗透通量显着提高。发现六方氮化硼/聚乙二醇 200 并入 PVDF 膜可提供更高的渗透通量 (3.41 kg/m² 对于Kħ ₂ SO ₄和2.62公斤/米² 为KNOħ ₃在80℃下具有更高的盐回收率比纯PVDF膜沿着一个温度）。对改性膜进行了 100 小时的长期测试，结果表明渗透通量具有一致性，电导率略有增加。