Synchrotron radiation（ SR） produces light that is highly brilliant than conventional X-ray sources. Photon energy covers from soft X-ray, tender X-ray to hard X-ray. By utilizing wide energy range and high quality of light, various scattering and spectroscopic methods can be applied to various soft materials. In this review, our recent researches on application of SR X-ray scattering and spectroscopy to soft matter are summarized.

Influence of addition method of silane coupling agent（ SCA） on the flexural strength and fracture toughness of silica particle-filled epoxy resin was investigated. The spherical silica particles were added to epoxy resin at amounts from 10 to 50 wt%. Two addition methods were compared, a pre-treatment method and an integral blend method in which all components were mixed simultaneously. Bonding, hydrocarbon and fluorocarbon type SCAs were employed. The bonding type has glycidoxy or amino groups that react with epoxy resin, whereas the other types have only hydrophobic chains. Higher both flexural strength and fracture toughness were obtained by the bonding type and the integral blend method. The better adhesion between particle/epoxy resin interface for the bonding type and the wettability of interface and the dispersibility for the hydrocarbon type were all obtained by the integral blend method than the pre-treatment method.

Material surface properties are drastically modified by grafting polymer brushes. Surface initiated polymerizations allow fabrication of polymer brushes attached to the material surfaces by covalent bond. A cationic polyelectrolyte brush, poly［2（- methacryloyloxy） ethyltrimethylammonium chloride］（ PMTAC）, was grafted on the poly（butylene terephthalate） laminate film on a steel plate through surface-initiated atom transfer radical polymerization（ SI-ATRP） and/or surface-initiated photo radical polymerization（ SI-PRP） methods. Both methods were valid to produce PMTAC brushes on the PBT surface. Meanwhile, the SI-PRP method was superior to the SI-ATRP from the practical view point of reduced process and short polymerization time. The hydrophobic PBT surfaces got hydrophilic through the PMTAC brush grafting. The PBT surfaces modified with PMTAC brushes showed excellent anti-fouling capability to various foulants that are required for bath wall application. The foulants were removed completely from the surfaces by washing with water. The anti-fouling properties were well retained after 10,000 cycle scratch processing with nylon scrub.