【摘要】：本論文以高聚物共混體系界面上的擴散現(xiàn)象為理論基礎(chǔ),采用一種新穎、簡單、經(jīng)濟、環(huán)保的復(fù)合膜層壓剝離的方法來實現(xiàn)超疏水表面的大面積制備。實驗采用工業(yè)常用原料聚乙烯與聚丙烯為制備材料,通過層壓法將聚合物薄膜復(fù)合,冷卻后剝離發(fā)現(xiàn)剝離表面有微納米級的層級結(jié)構(gòu),賦予表面優(yōu)良的超疏水性質(zhì)。文章研究了加工原料的支化結(jié)構(gòu),組分比,加工條件,剝離條件等方與剝離表面微觀結(jié)構(gòu)的相互影響關(guān)系,并對表面的微觀結(jié)構(gòu)和潤濕情況進行性能表征。實驗結(jié)果發(fā)現(xiàn)與其他種類聚乙烯相比, HDPE與PP層壓剝離后表面剝離纖維密度最大,CA角可達157°,為同種加工條件下幾種聚乙烯材料中超疏水性能最好的材料。加工條件會通過影響界面擴散影響最終的剝離表面的微觀結(jié)構(gòu),實驗首先對mLLDPE與PP進行層壓剝離,考察加工工藝對超疏水性能的影響。結(jié)果發(fā)現(xiàn)當層壓溫度達到180℃,層壓時間為30s時,常溫冷卻剝離后,剝離表面的微觀層級結(jié)構(gòu)賦予mLLDPE表面最優(yōu)的超疏水性能,表觀接觸角可高達160°。之后又對HDPE/PP進行剝離工藝的考察,發(fā)現(xiàn)淬火的冷卻方式和80℃剝離溫度時,HDPE表面剝離纖維密度最大,接觸角為167°。另外,我們對實驗制備的超疏水表面進行性能優(yōu)化改善其表面耐磨性及超疏油的性質(zhì)。實驗分別采用超高分子量聚乙烯(UHMWPE)和二氧化硅(Si02)進行共混改性來增加剝離表面的層級結(jié)構(gòu),以一種“保護性”微球及增加表面層級結(jié)構(gòu)的方法來改善表面的耐磨性。實驗證明,超高分子量聚乙烯的加入量達40%時表面耐磨性最優(yōu),靜摩擦后接觸角變化率最小,而Si02的加入雖然增加了表面微觀結(jié)構(gòu)的層級性,但經(jīng)摩擦后,接觸角迅速下降,耐磨性并沒有太大改善。對超疏油表面的改性主要是在剝離表面進行氟硅烷的沉積,在控制表面粗糙度的基礎(chǔ)上降低剝離表面的表面能,并通過改變氟硅烷沉積時間和沉積濃度發(fā)現(xiàn)適量的濃度和時間可有效的達到表面雙超疏的目的。
[Abstract]:In this paper, based on the diffusion phenomenon on the interface of polymer blends, a novel, simple, economical and environmentally friendly method of composite film layer peeling is used to prepare superhydrophobic surface in large area. Polyethylene and polypropylene were used as preparation materials in the experiment. The polymer film was composite by lamination method. After cooling, it was found that the peeled surface had micro-nanometer hierarchical structure, which gave the surface excellent superhydrophobic properties. In this paper, the relationship between the branching structure, component ratio, processing conditions and peeling conditions of raw materials and the microstructure of peeling surface was studied, and the properties of surface microstructure and wetting were characterized. The experimental results show that compared with other kinds of polyethylene, the density of surface peeling fiber after HDPE and PP lamination peeling is the highest, and the CA angle can reach 157 擄, which is the best superhydrophobic material among several polyethylene materials under the same processing conditions. The microstructure of the final peeling surface will be affected by the interface diffusion. firstly, the lamination peeling of mLLDPE and PP is carried out to investigate the effect of processing technology on the superhydrophobic properties. The results show that when the lamination temperature reaches 180 鈩，

本文編號：2487047