自清洁超疏水无胶纳米纤丝化复合材料的制备及其性能  

Preparation and Performance of Self-cleaning Superhydrophocic Nanofibrillatedcellulose Composite Binderless Composite

作　　者：杨玉山 沈华杰[2] 王宪[2] 邱坚 Yang Yushan;Shen Huajie;Wang Xian;Qiu Jian(Southwest Forestry University,Kunming 650224,P.R.China)

机构地区：[1]西南林业大学材料科学与工程学院,昆明650224 [2]西南林业大学,昆明650224

出　　处：《东北林业大学学报》2020年第6期80-85,共6页Journal of Northeast Forestry University

基　　金：国家自然科学基金面上项目(30471357)。

摘　　要：以松木纤维为原料,通过机械胶膜法将松木纤维和改性贝壳粉体有效地复合在一起,再通过无胶热压得到高机械性能、自清洁超疏水复合材料。借助扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)和X射线光电子能谱(XPS)对复合材料的形貌结构、化学组分的主要基团和元素变化进行分析,对其润湿性能进行探索以确定自清洁超疏水特性。结果表明:SEM显示贝壳粉体与松木纤维能够有效地粘合在一起;木质纤维素复合材料FTIR谱图显示,在1498 cm^-1处的离子的晶格振动峰变宽,即木质纤维素复合材料与改性贝壳粉体发生化学吸附,即活化改性产生新的化学键;XPS图谱显示通过OH-键在自清洁超疏水木质纤维素复合材料表面上附着有改性贝壳粉体;木质纤维素复合材料表面水接触角为153°,表面的石墨粉被滚动的水滴带走,水滴中充满了污染物,显示出自清洁能力,形成一个清洁的表面;纳米木质纤维素/甲壳素复合材料的静曲强度、弹性模量、内结合强度分别为34.04、7043、0.955 MPa;同时还表现出一定的尺寸稳定性,及吸水厚度膨胀率仅为3.32%。Pine lignocellulose are used as raw materials.Pine lignocellulose and shell powder can be effectively compounded by mechanical film method.Superhydrophobic and self-cleaning nanofibrillatedcellulose binderless composite was obtained by hot-spot.The morphology,structure,chemical components and element variation of the nanofibrillatedcellulose composite was analyzed by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR)and X-ray photoelectron spectroscopy(XPS).Wetting characteristics of the nanofibrillatedcellulose composites were compared for exploring the superhydrophobic and self-cleaning properties of nanofibrillatedcellulose composites.The results show that SEM test results showed that the pine lignocellulose was laminated through the grinding and the shell powder was effectively attached.FTIR test results showed that the lattice vibrational peak of the hydration at 1498 cm^-1 was broadened,and the nanofibrillatedcellulose composite was chemically adsorbed with the shell powder,that is,activation modification produces a new chemical bond.By XPS test,the modified shell powder was adhered to the surface of the superhydrophobic and self-cleaning nanofibrillatedcellulose composite by an OH-bond.The water contact angle of the nanofibrillatedcellulose composite surface was 153°.The moving droplet was able to pick up the graphite powder,after removal of the contamination,the water droplet was loaded with contaminations,revealing a self-cleaning ability.The static bending strength,modulus of elasticity and internal bonding strength of fibrillatedcellulose composite exhibited the high strength of the static bending strength of 34.04 MPa,the modulus of elasticity of 7043 MPa and the internal bonding strength of 0.955 MPa,respectively.Meanwhile,it showed the dimensional stability with the swelling value of water absorption thickness of 3.32%.

关 键 词：松木纤维 贝壳粉体 无胶纳米纤丝化复合材料 机械性能 自清洁超疏水 

分 类 号：S781.29[农业科学—木材科学与技术]