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第54卷第6期 涂料工业 Vol. 54 No. 6
2024年6月 金 等:聚醋酸乙烯酯基光固化核壳乳液的合成及其在水性木器涂料中的应用 Jun. 2024
PAINT & COATINGS INDUSTRY
聚 酸 烯酯基光固化核壳乳液的合成
及其在水性木器涂料中的应用
,李 , ,李志国
(东北 大学材料科学与工程学院, 150040)
摘 要:为解决水性木器涂料涂装效率低的问题,首先构建了双键功能化 PVAc 基核壳乳胶粒,
然后通过预乳化将多活性单体(TMPTA)在乳胶粒合成后期加入乳液,制备了 PVAc 基光固化复合乳
液,并对其稳定性、光固化性能和漆膜性能等进行了研究。结果表明:所制备的 PVAc 基核壳乳胶粒
壳层含有活性双键,且粒径远小于紫外光波长,可实现 UV 固化;通过调控活性单体的加入量,可显著
加快PVAc基光固化复合乳液的成膜速度,应用于木器漆涂饰时,最快可在20 s内完成固化;同时乳胶
膜性能可调控,在活性单体 TMPTA 与壳层双键的物质的量比为 3∶1 时,光固化乳胶膜的力学性能最
佳,其拉伸强度为 0. 91 MPa,断裂伸长率为 1. 29%,弹性模量为 70. 54 MPa;此外,木器涂料漆膜硬度、
附着力、光泽和粗糙度分别为 4H、0 级、23. 7、1. 15 μm。所制备的 PVAc 基光固化复合乳液将在水性
木器涂料具有广阔的应用前景。
关键词:水性木器涂料;核壳结构乳液;聚醋酸乙烯酯;不对称双键;紫外光固化
中图分类号:TQ635. 3 文献标志码:A 文章编号:0253-4312(2024)06-0022-07
doi:10. 12020/j. issn. 0253-4312. 2023-397
Synthesis of Photocuring PVAc-based Core-shell Emulsion and
Its Application in Waterborne Wood Coatings
NIE Jinqiu,LI Huanhuan,FAN Xiaohui,LI Zhiguo
(Material Science and Engineering College,Northeast Forestry University,Harbin 150040,China)
Abstract:Addressing the low painting efficiency of waterborne coatings,the PVAc-
based core/shell latex functionalized with double bound groups was firstly fabricated by
grafting dipentene on shell surface of the latex. Then,he UV-curable composite emulsion was
t
prepared through adding pre-emulsified polyfunctional monomer(TMPTA)at the late stage of
a
latex formation,iming to accelerate the film-forming of the latex emulsion. The stability of its
l
lotion,ight curing properties,mechanical properties and film properties were studied. The
prepared PVAc-based core-shell latex can achieve UV-curing due to the grafting of active
group combining with the small latex size within the UV wavelength range. By adjusting the
t
amount of polyfunctional monomer,he film-forming of PVAc-based composite emulsion can
be significantly accelerated. Appling to wood coatings,UV curing can be achieved in as little
[基金项目] 国家自然科学基金(32171695)
*通信作者:李志国(1977—),男,教授,主要从事木材胶接与涂饰、高性能乳液的研究。
本文规范引用格式:
金 ,李 ,范晓慧,等. 聚 酸乙烯酯基光固化核壳乳液的合成及其在水性木器涂料中的应用[J]. 涂料工业,2024,54(6):22-28.
e
NIE J Q,LI H H,FAN X H,t al. Synthesis of photocuring PVAc-based core-shell emulsion and its application in waterborne wood coatings[J]. Paint
& Coatings Industry,2024,54(6):22-28.
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