{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T01:49:48Z","timestamp":1785376188083,"version":"3.55.0"},"reference-count":35,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2021,9,15]],"date-time":"2021-09-15T00:00:00Z","timestamp":1631664000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Microcapsules with lac resin as the core material and urea-formaldehyde resin as the wall material were prepared by in situ polymerization, and then the lac resin microcapsules and fluorane microcapsules were added into a water-based primer or topcoat, respectively, to prepare water-based coatings with dual functions of thermochromic and self-repair. The effects of different methods of adding microcapsules on the optical properties, mechanical properties, self-repairing properties, and the aging resistance of water-based paint film were investigated, so as to prepare water-based paint film with the best discoloration and self-repairing functions. The results showed that the paint film with 10.0% fluorane microcapsules in the topcoat and 5.0% lac resin microcapsules in the primer had better comprehensive properties, and the paint film changed from yellow to colorless at 32 \u00b0C, with a color difference of 68.9, hardness of 3H, adhesion grade of 0, impact resistance of 13.0 kg\u2219cm, and elongation at break of 20.0%. The resistance of the paint film to NaCl, ethanol, and detergent was grade 2, with slight discontinuous marks, and the resistance to red ink was grade 3, with slight marks. The lac resin microcapsules have good aging resistance, which can enhance the aging resistance of the paint film with fluorane microcapsules. The gap width of the paint film was repaired by 2.1 \u00b5m, the self-repairing rate was 12.3%, and the paint film with lac resin microcapsules had a better crack inhibition effect. The results have provided a reference for multifunctional wood coatings.<\/jats:p>","DOI":"10.3390\/polym13183109","type":"journal-article","created":{"date-parts":[[2021,9,15]],"date-time":"2021-09-15T12:00:44Z","timestamp":1631707244000},"page":"3109","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Preparation and Performance of Thermochromic and Self-Repairing Dual Function Paint Film with Lac Resin Microcapsules and Fluorane Microcapsules"],"prefix":"10.3390","volume":"13","author":[{"given":"Xiaoxing","family":"Yan","sequence":"first","affiliation":[{"name":"Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China"},{"name":"College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenting","family":"Zhao","sequence":"additional","affiliation":[{"name":"College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lin","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Liu, Q.Q., Gao, D., and Xu, W. (2021). Influence of the bottom color modification and material color modification process on the performance of modified Poplar. Coatings, 11.","DOI":"10.3390\/coatings11060660"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Liu, Q.Q., Gao, D., and Xu, W. (2020). Effect of sanding processes on the surface properties of modified Poplar coated by primer compared with Mahogany. Coatings, 10.","DOI":"10.3390\/coatings10090856"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Wu, S.S., Tao, X., and Xu, W. (2021). Thermal conductivity of Poplar wood veneer impregnated with graphene\/polyvinyl alcohol. Forests, 12.","DOI":"10.3390\/f12060777"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"28","DOI":"10.22382\/wfs-2020-004","article-title":"Effect of coating thickness on sound absorption property of four wood species commonly used for piano soundboards","volume":"52","author":"Xu","year":"2020","journal-title":"Wood Fiber Sci."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"403","DOI":"10.1007\/s00226-021-01264-y","article-title":"Self-assembly of poly(styrene\u2013methyl methacrylate-acrylic acid) (P(St\u2013MMA\u2013AA)) colloidal microspheres on wood surface by thermal-assisted gravity deposition","volume":"55","author":"Liu","year":"2021","journal-title":"Wood Sci. Technol."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Liu, Y., and Hu, J. (2021). Investigation of polystyrene-based microspheres from different copolymers and their structural color coatings on wood surface. Coatings, 11.","DOI":"10.3390\/coatings11010014"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Liu, Y., Hu, J., and Wu, Z. (2020). Fabrication of coatings with structural color on a wood surface. Coatings, 10.","DOI":"10.3390\/coatings10010032"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"101390","DOI":"10.1016\/j.est.2020.101390","article-title":"Thermo-physical analysis of natural shellac wax as novel bio-phase change material for thermal energy storage applications","volume":"29","author":"Murthy","year":"2020","journal-title":"J. Energy Storage"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"105559","DOI":"10.1016\/j.porgcoat.2020.105559","article-title":"Modification of shellac coating using Jeffamine (R) for enhanced mechanical properties and stability","volume":"141","author":"Bar","year":"2020","journal-title":"Prog. Org. Coat."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"205","DOI":"10.1108\/03699420610677208","article-title":"Specular reflectance and derivative spectrometric studies of lac-phenol formaldehyde resin blends","volume":"35","author":"Bhatia","year":"2006","journal-title":"Pigm. Resin. Technol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"5069","DOI":"10.1039\/c2sm07488e","article-title":"Triggered cell release from shellac-cell composite microcapsules","volume":"8","author":"Hamad","year":"2012","journal-title":"Soft Matter"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1016\/j.partic.2015.09.003","article-title":"Composite microcapsules with enhanced mechanical stability and reduced active ingredient leakage","volume":"26","author":"Long","year":"2016","journal-title":"Particuology"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"726","DOI":"10.1002\/jsfa.10685","article-title":"Microencapsulation of probiotic lactobacilli with shellac as moisture barrier and to allow controlled release","volume":"101","author":"Huang","year":"2021","journal-title":"J. Sci. Food Agric."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"4015","DOI":"10.1038\/s41598-018-22445-z","article-title":"Thermochromic microcapsules with highly transparent shells obtained through in-situ polymerization of urea formaldehyde around thermochromic cores for smart wood coatings","volume":"8","author":"Zhu","year":"2018","journal-title":"Sci. Rep."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"24175","DOI":"10.1039\/C9RA04740A","article-title":"Dispersion of microcapsules for the improved thermochromic performance of smart coatings","volume":"9","author":"Pedaballi","year":"2019","journal-title":"RSC Adv."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"1343","DOI":"10.1246\/cl.190629","article-title":"Polyurea microcapsules with different phase change material for thermochromic smart displays","volume":"48","author":"Park","year":"2019","journal-title":"Chem. Lett."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"379","DOI":"10.1016\/j.jcis.2020.06.010","article-title":"Solid-state photochromism of spironaphthoxazine loaded microcapsules with photo-patterning and thermo-regulating features","volume":"578","author":"Raeesi","year":"2020","journal-title":"J. Colloid Interface Sci."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1097","DOI":"10.1080\/00405000.2019.1684224","article-title":"Research on the behaviors of extending thermochromic colors for a new thermochromic microcapsule","volume":"111","author":"Ma","year":"2019","journal-title":"J. Text. Inst."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Yan, X.X., and Wang, L. (2020). Preparation of shellac resin microcapsules coated with urea formaldehyde resin and properties of waterborne paint films for Tilia amurensis Rupr. Membranes, 10.","DOI":"10.3390\/membranes10100278"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"105377","DOI":"10.1016\/j.foodhyd.2019.105377","article-title":"Stability and functionality of xanthan gum-shellac nanoparticles for the encapsulation of cinnamon bark extract","volume":"100","author":"Muhammad","year":"2020","journal-title":"Food Hydrocoll."},{"key":"ref_21","doi-asserted-by":"crossref","unstructured":"Wang, W.W., Liu, P.F., Lu, Q., Ling, X.F., Zhang, J.W., Chen, M.S., Chen, H., and Chen, X.M. (2019). Potential pathways and genes involved in Lac synthesis and secretion in kerria chinensis (hemiptera: Kerriidae) based on transcriptomic analyses. Insects, 10.","DOI":"10.3390\/insects10120430"},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Wang, L., and Yan, X.X. (2020). Mechanical and optical properties of thermochromic reversible waterborne primer film on Tilia europaeawith 1,2-Benzo-6-diethylaminofluorane based microcapsules. Polymers, 12.","DOI":"10.3390\/polym12092062"},{"key":"ref_23","unstructured":"(1995). Colour Standard for Paint Film, Standardization Administration of China. GB\/T 3181-1995."},{"key":"ref_24","unstructured":"(2006). Paints and Varnishes-Determination of Film Hardness by Pencil Test, Standardization Administration of China. GB\/T 6739-2006."},{"key":"ref_25","unstructured":"(2013). Test of Surface Coatings of Furniture-Part 4: Determination of Adhesion-Cross Cut, Standardization Administration of China. GB\/T 4893.4-2013."},{"key":"ref_26","unstructured":"(1993). Determination of Impact Resistance of Film, Standardization Administration of China. GB\/T 1732-1993."},{"key":"ref_27","unstructured":"(2005). Furniture-Assessment of Surface Resistance to Cold Liquids, Standardization Administration of China. GB\/T 4893.1-2005."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"108535","DOI":"10.1016\/j.matdes.2020.108535","article-title":"Microencapsulation of ethylenediamine and its application in binary self-healing system using dual-microcapsule","volume":"189","author":"Hu","year":"2020","journal-title":"Mater. Des."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1080\/02773813.2013.861850","article-title":"Investigating the extent of urea formaldehyde resin cure in medium density fiberboard: Resin extractability and fiber effects","volume":"34","author":"Grigsby","year":"2014","journal-title":"J. Wood Chem. Technol."},{"key":"ref_30","first-page":"312","article-title":"Effect of lac treatment on mechanical properties of jute fabric\/polyester resin based biocomposite","volume":"41","author":"Ammayappan","year":"2016","journal-title":"Indian J. Fibre Text."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"149","DOI":"10.1016\/j.chroma.2014.02.063","article-title":"Characterisation and discrimination of various types of lac resin using gas chromatography mass spectrometry techniques with quaternary ammonium reagents","volume":"1338","author":"Sutherland","year":"2014","journal-title":"J. Chromatogr. A"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Yan, X.X., Wang, L., and Qian, X.Y. (2019). Effect of urea-formaldehyde-coated epoxy microcapsule modification on gloss, toughness and chromatic distortion of acrylic copolymers waterborne coating. Coatings, 9.","DOI":"10.3390\/coatings9040239"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"119403","DOI":"10.1016\/j.fuel.2020.119403","article-title":"Long-term photo oxidation aging investigation of temperature-regulating bitumen based on thermochromic principle","volume":"286","author":"Chen","year":"2021","journal-title":"Fuel"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"9547","DOI":"10.15376\/biores.11.4.9547-9559","article-title":"Development of photochromic wood material by microcapsules","volume":"11","author":"Hu","year":"2016","journal-title":"Bioresources"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1093\/treephys\/tpu108","article-title":"Distilling allometric and environmental information from time series of conduit size: The standardization issue and its relationship to tree hydraulic architecture","volume":"35","author":"Carrer","year":"2015","journal-title":"Tree Physiol."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/18\/3109\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:00:08Z","timestamp":1760166008000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/18\/3109"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,9,15]]},"references-count":35,"journal-issue":{"issue":"18","published-online":{"date-parts":[[2021,9]]}},"alternative-id":["polym13183109"],"URL":"https:\/\/doi.org\/10.3390\/polym13183109","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,9,15]]}}}