［Objective］To investigate the curing kinetics of the curing process for a waterborne epoxy-amine system，establish a more accurate thermal kinetic model，and provide guidance for the formulation design of waterborne epoxy coatings.［Methods］Based on differential scanning calorimetry（DSC）test data for the curing of a two-component waterborne epoxy resin and the Kamal-Sourour（KS）model，a KS & diffusion model（abbreviated as KS & diff）was developed by incorporating a Williams-Landel-Ferry（WLF）equation-based diffusion correction. Furthermore，combining the KS-diff model with DSC isothermal testing，the Time-Temperature-Transformation（TTT）diagram for this waterborne epoxy resin curing was constructed.［Results］ The KS-diff model achieved 97. 8% agreement with the experimental DSC data for simulating the curing kinetics of the waterborne epoxy-amine system. The experimentally determined degree of cure from isothermal tests agreed well with themodel predictions. Furthermore，the curing states predicted by the TTT diagram correlated well with thecoating's hygrothermal resistance performance.［Conclusion］ The KS-diff model can effectivelysimulate the curing kinetics of the waterborne epoxy-amine system and provide valuable guidance forformulating waterborne epoxy coatings.

［Objective］ The traditional anticorrosive coatings are prone to damage and failureunder harsh environments. To address this issue，a dual-functional anticorrosive coating integrating damage-visualized self-warning and self-repairing capabilities was designed.［Methods］ Ethyl cellulose core-shell microcapsules encapsulating the warning agent（fluorescein sodium）and repairing agent（linseed oil）were successfully prepared via the solvent evaporation method. These microcapsuleswere then incorporated into epoxy resin to create a composite coating with autonomous damage warningand repairing functions. When subjected to mechanical damage，the embedded microcapsule shells rupture under the effect of stress concentration. Based on the aggregation-induced fluorescence quenching effect，the released fluorescein sodium emits yellow-green fluorescence in the damaged areas due to the decrease in concentration in the humid environment. Simultaneously，a dense repair layer is formed at the scratch through oxidative crosslinking of the released linseed oil.［Results］SEM characterization confirmed the distinct core-shell structures in the microcapsules，ensuring theencapsulation of functional agents. Fluorescence spectroscopy results revealed a 60% intensity increasein damaged regions compared to intact zones. Scratch tests demonstrated that a 14 μm-wide scratch inthe composite coating could be completely closed within 1 hour. Electrochemical impedance spectroscopy（EIS） showed that the composite coating maintained an impedance modulus of 
3. 15×10⁹Ω ·cm² after 75 days' immersion in 3. 5%NaCl solution，confirming long-term corrosion resistance.［Conclusion］ This research establishes an integrated anti-corrosion coating featuring “damage sensing，visual warning，and in-situ repair”. This coating demonstrates significant potentialfor practical deployment in corrosion protection for metal equipment and real-time health monitoringunder demanding service environments such as ships，bridges，and offshore platforms. 

［Objective］To solve the problem of rapid failure of acrylic polyurethane coating after defects or local damage.［Methods］ This study employed a one-pot synthesis strategy to in situ polymerize pyrrole（PPy） onto the surface of cetyltrimethylammonium bromide（CTAB）-modified graphene，producing Gr-PPy nanoparticles for incorporation into acrylic polyurethane anticorrosion coatings. The microstructure and composition of Gr-PPy nanoparticles were characterized using scanning electron microscopy（SEM），Raman spectroscopy，and Fourier-transform infrared spectroscopy（FT-IR）. The corrosion resistance of the coatings was evaluated via electrochemical impedancespectroscopy（EIS） and neutral salt spray（NSS） tests.［Results］ The acrylic polyurethane coating modified with Gr-PPy powder（PPY）exhibited significantly enhanced corrosion resistance. Notably， the PPY3 coating demonstrated optimal corrosion resistance：after 42 days of immersion in 3. 5%NaCl solution，its impedance modulus at 0. 01 Hz remained at 5. 3×10¹⁰ Ω ·cm²，and it showed the least severe corrosion after 672 hours of NSS test.［Conclusion］The excellent anticorrosion performance of the PPY3 coating was attributed to the synergistic effects of the physical barrier provided by impermeable graphene sheets and the passivation induced by PPy.

［Objective］To address the persistent challenges of leakage failure，thermal cycling instability，and low energy storage density in conventional phase change materials（PCMs）applied to solar energy storage，waste heat recovery，building energy efficiency，and electronics thermal management.［Methods］ This study innovatively proposes a molecular design strategy for polyurethane-based solid-solid PCM（PUPCM） through structural modulation. Specifically，linear main-chain PUPCM（L-PUPCM） was constructed via block copolymerization of hexamethylene diisocyanate（HDI）/urea with poly（ethylene glycol）（PEG），while three-dimensional networked PUPCM（C-PUPCM）was formed through crosslinking reactions between triphenylmethane triisocyanate（TTI） and PEG. Systematic investigations of structure-property relationships were conducted by regulatingfeed ratios［n（PEG）∶n（HDI）∶n（Urea）=1∶2. 2∶0. 2 for linear systems；n（TTI）∶n（PEG）=1∶2.2 for crosslinked systems］ and PEG molecular weights.［Results］ DSC results demonstrated high phase change enthalpies of 157. 8 J/g for linear structures and 125. 3 J/g for crosslinked structures，both exhibiting excellent latent heat. FT-IR analysis confirmed effective immobilization of PEG phase-change units in both materials，with crosslinked structures showing superior dimensional stability.［Conclusion］ This work provides a novel molecular design strategy for developing high-enthalpy， high-stability solid-solid PCMs.

［Objective］To prepare an acrylic silane ester resin with controllable hydrolysis abilityfor the stable release of antifouling agents within the coating，thereby improving the long-term antifouling performance of self-polishing antifouling coatings.［Methods］Isobornyl acrylate monomerwas introduced into the synthesis route of the conventional acrylic silane ester resin to successfullyprepare a linear hydrolyzable acrylic silane ester resin. The difference in hydrolysis rate between thisresin and the conventional one was compared. A self-polishing antifouling coating was prepared basedon the linear hydrolyzable acrylic silane ester resin and an organic boron antifouling agent. The effect ofresin content variation on the coating’s antifouling performance was investigated.［Results］ The polishing rate of the linear hydrolyzable acrylic silane ester resin remained stable at（3±1）μm/month during 6 laboratory test cycles，demonstrating significantly enhanced hydrolysis stability compared to the conventional acrylic silane ester resin. When the content of linear hydrolyzable acrylic silane esterresin in the coating was 32%，the antifouling performance was optimal，along with excellent mechanical properties and coating compatibility.［Conclusion］The linear hydrolyzable acrylic silane ester resineffectively enhances the antifouling performance of self-polishing coatings，enabling long-term foulingprotection for marine facilities such as ships and offshore drilling platforms.

［Objective］Addressing the issues of photovoltaic glass surfaces being susceptible to environmental abrasion and fogging due to water vapor condensation caused by temperature fluctuations.［Methods］ Hydrophilic silane monomer（F6-TMS） was synthesized via silicon hydrogenation addition reaction，and hydrophilic nanoparticles（F6@SiO₂）were produced by hydrolysisand condensation with ethyl orthosilicate. The hydrophilic acrylic resin emulsion（WPA）was obtained by seed emulsion polymerization using allyloxypolyethyleneglycol and acrylate monomers as raw materials. The nanoparticle hybrid superhydrophilic coating F6@SiO₂-WPA was constructed by composite roasting of the two，and the nanoparticles and the resin were characterized by FT-IR and SEM. The wettability，abrasion resistance，transmittance，and anti-fogging properties of the superhydrophilic coating were tested.［Results］The results showed that when F6@SiO₂ was added at 30%，the water contact angle（WCA）of the constructed superhydrophilic coating was 3. 3°，and after 600 cycles of abrasion，the WCA remained below 10° and the coating was in a superhydrophilic state overall. The light transmittance of the coating was 93. 1%，which was 3. 8% higher than that of blank glass，showing a significant light-transmitting effect. After being placed for 30 days，the anti-fog grade of the coating remained at level 0. The superhydrophilic coating showed excellent anti-fog performance and durability.［Conclusion］ F6@SiO₂-WPA provides new solutions in the field of anti-reflection and anti-fogsuperhydrophilic coatings for photovoltaic glass.

［Objective］To improve painting efficiency and cut costs，while meeting the higherrequirements for dry film thickness of waterborne epoxy coatings in a single application within the steelstructure coating industry.［Methods］ Through the screening of waterborne epoxy curing agents， waterborne epoxy emulsions，and rheological additives，a high-build waterborne epoxy mica iron oxide（MIO） intermediate coating was developed. The study focused on the evaluation of the coating's sagging resistance，neutral salt spray test，pull-off adhesion，and continuous condensation test. Additionally，the water evaporation rate under different temperatures and wet film thicknesses wasmeasured via the mass loss method to determine the optimal application conditions.［Results］The optimized coating demonstrates exceptional application properties：sagging resistance of 425 μm（wet film，one coat），2 280 h neutral salt spray test，7 MPa pull-off adhesion，and 504 h continuous condensation test，meeting industrial requirements for heavy-duty corrosion protection.［Conclusion］ The composite coating system met all requirements for atmospheric corrosion category C4（H） as specified in the Chinese industrial standard HG/T 5176—2017（Water-based anticorrosive coatings for steel structures）. This work provides a reliable solution for industrial applications of high-performance waterborne epoxy intermediate coatings.

［Objective］To integrate hydrophobicity and hardness of long carbon chain modified photocured coatings，a long carbon chain polyurethane-urea acrylate was prepared.［Methods］An intermediate was first prepared by reacting hydroxyethyl acrylate with isophorone diisocyanate，which was then further reacted with bio-based dimeric diamines（Priamine 1074 and Priamine1071） to synthesize polyurethane-urea acrylates（PUUA-1074 and PUUA-1071）. The product structure was confirmed by Fourier transform infrared spectroscopy and ¹H NMR.［Results］The prepared bio-based PUUA coatings exhibited water absorption below 1%，demonstrating excellent hydrophobicity，with no pitting or blistering observed on the PUUA-1074 coating surface after 600 h salt spray testing.Meanwhile，benefiting from the hydrogen bonding reinforcement provided by the urea groups，the PUUA-1074 cured film achieved both good tensile strength（40. 9 MPa）and surface hardness（pencil hardness F）.［Conclusion］ Introduction of urea groups couldimprove the hardness of long carbonchain-modified photocured coatings.

【Objective】To explore the application potential of bio-based materials in the field ofwater-based polyurethanes and reduce reliance on petroleum-based products.【Methods】Using poly（trimethylene ether）glycol（PO3G），polycarbonate diol（PCDL），dimethylolpropionic acid（DMPA）， and isophorone diisocyanate（IPDI） as the main raw materials，a series of bio-based water-based polyurethane dispersions with a solid content of 50% were prepared，and the printing performance wastested by preparing them into printing pastes. Characterization analysis of the product was conductedusing infrared spectroscopy，and the effects of PCDL dosage on the stability of dispersion，thermodynamic properties，mechanical properties，water contact angle，and printing performance of the film were discussed.【Results】With the increase of PCDL content，the elongation at break of the film decreased，while the strength and hardness gradually improved. When the mass of PCDL and PO3G was40 g and 80 g respectively，the water contact angle on the coating surface was increased to 83. 9°. The XRDtesting results indicated that the material was an amorphous polymer. Additionally，in printing tests，the soaping fastness of the cloth board was significantly improved.【Conclusion】This study demonstrates the feasibility of replacing petroleum-based products with bio-based alternatives，providing theoretical support for the application of bio-based water-based polyurethanes in the printing field.

［Objective］To address the premature cracking and delamination of steel structurecoatings induced by vibration and thermal deformation in dynamic service environments，this studydeveloped a fast-curing aspartic acid-modified polyurethane topcoat with enhanced weather resistanceand dynamic fatigue resistance. The aim was to improve the long-term protection of steel structuresunder harsh conditions.［Methods］ The effects of key formulation components including the resin system（hydroxyacrylic-aspartic acid hybrid resin），curing agent，and pigment volume concentration（PVC）on coating performance were systematically investigated. The optimized coating was preparedand subjected to comprehensive evaluation through tensile tests，UV aging，thermal cycling，and combined vibration fatigue testing.［Results］At a hydroxyacrylic-to-aspartic acid resin mass ratio of 1∶1 and a PVC of 0.20，the coating demonstrated optimal performance：rapid curing（full drying achieved within 1 hour at 45 ℃）， excellent mechanical properties（tensile strength：7. 3 MPa； elongation at break：140%）， outstanding weather resistance（no chalking after 2 000 hours of UVB aging，with 54. 6% gloss loss）， and superior dynamic fatigue resistance（no cracking or delamination after 20 thermal cycles and 10 million vibration cycles）.［Conclusion］ The aspartic acid-modified polyurethane topcoat demonstrated rapid curing，excellent mechanical properties，high weather resistance，and dynamic fatigue resistance. This significantly extended the service life of steel structuressubjected to temperature fluctuations and vibrational stresses. This work provides a novel solution forthe long-term protection of dynamically serviced facilities.

［Objective］To improve the corrosion resistance of magnesium alloys.［Methods］A composite coating consisting of a magnesium hydroxide bottom layer and a calcium silicate（CaSiO .） top layer was constructed on AZ91D magnesium alloy using a one-step hydrothermal method. Theinfluence of reaction conditions on the structure and performance of the coating was systematicallyinvestigated. The optimal preparation parameters were determined by regulating the hydrothermalreaction temperature and time. Coating performance was comprehensively evaluated using polarizationcurves，electrochemical impedance spectroscopy（EIS），and immersion weight loss tests.［Results］The prepared coatings significantly enhanced the corrosion resistance of the substrate under all investigatedreaction conditions. The corrosion current density of the best-performing sample was approximatelyfour orders of magnitude lower than that of the uncoated alloy. Furthermore，the coating maintained a stable structure during prolonged exposure to a corrosive environment，demonstrating excellent corrosion resistance.［Conclusion］This hydrothermal coating strategy provides a green，efficient，and feasible approach for surface protection of magnesium alloys.

［Objective/Significance］By sorting out phase separation theories，design strategies and existing bottlenecks of self-stratifying coatings，this paper lays a theoretical and practicalfoundation for technical breakthroughs. Future research is expected to advance their multi-functionalintegration and intelligent applications， expanding scenarios in emerging fields.［Analysis/Discussion/Progress］ The phase separation theories of self-stratifying coatings were systematically described，including density gradient-driven theory，Flory-Huggins theory，Hansen solubility theory and surface energy theory. Furthermore，the system design strategies were discussed in-depth，covering resin selection and combination，solvent system formulation，pigment and filler selection，additive incorporation，process parameter regulation and multi-functional synergy. The current technological bottlenecks in large-scale production，coating stability and precise control of structure and performance were clearly pointed out.［Conclusion/Prospect］Self-stratifying coatings， designed via phase separation theory，embody multi-layer advantages but face with bottlenecks like intricate production and poor film stability. Efforts should be done furtherly to advance theory，optimize preparation，expand its applications in areas such as multifunctional integration and intelligence，and facilitate industrialization. 

结蜡机理；输油管道；防蜡；仿生超双疏涂层