The metal-organic framework (MOF) materials family is one of the biggest porous materials families that has been explored by the scientific community in the last 25 years. They consist of the self-assembly of organic linkers with inorganic clusters, also called secondary building units (SBUs), resulting in porous structures with different topologies. However, MOFs are typically obtained as microcrystalline powders exhibiting poor mechanical properties which presents a challenge to industrial implementation. For example, many lose their desirable physical properties such as porosity during processing, the retention of which is crucial for many applications including water harvesting, gas sorption, drug delivery and heterogeneous catalysis. MOF composites have recently received great attention as they offer a realistic solution to maintain the MOF's properties whilst avoiding mechanical instability and processing issues. MOF composites are typically formed by combining the crystalline MOF with another porous or non-porous material. There are many kinds of composites, including mixed-matrix membranes, silica-MOF composites, MOFs coated with oxides and graphene oxide containing MOFs. A common issue with compositing, however, is a reduction in the chemical and physical efficacy of the resultant material. In addition, composites in general are highly sensitive to the nature of the interface.