Fluorinated Hyperbranched Poly（urea-urethane）s Containing Reactive Groups： Synthesis, Characterization and Application on Cotton Fabric

A series of hyperbranched poly(urea-urethane) s (HPUs)containing short fluoroalkyl chain and reactive groups (HPUFs)capable as hydrophobic and oleophobic coating materials were synthesized.The obtained polymers were characterized by FTIR ( fouier transform-infrared spectroscopy ),1 H NMR ( nuclear magnetic resonance),13C NMR,19F NMR,GPC(gel permeation chromatography),TGA ( thermogravimetric analyzer),and XPS (X-ray photoelectron spectroscopy) analyses.Highly hydrophobic and oleophobic cotton fabrics could be achieved from these fluorinated hyperbranched polymers by solution-immersion coating method.The static contact angles reached to 143°,114°,and 92° for water,hexadecane,and decane,respectively.The water and oil repellency ratings were 90 and 6,respectively,and still kept 80 and 5.respectively,after 10 soaping cycles at 50℃.     

新型含氟硅丙烯酸酯核壳乳液的合成及其在棉织物上的拒水拒油性

采用半连续种子乳液聚合法,在非离子/阴离子复配乳化剂体系下,以3-甲基丙烯酰氧基丙基三甲氧基硅烷修饰的纳米二氧化硅为核,甲基丙烯酸[2,3,3,3四-氟-2-(1,1,2,3,3,3六-氟-2-(全氟丙氧基)丙氧)丙基]酯、甲基丙烯酸十八烷酯为壳功能单体,合成了新型含氟硅丙烯酸酯核壳乳液.该乳液具有良好的拒水拒油性,经其处理的棉织物对水的接触角可达到(154±2)°,对正十六烷的接触角达到(107±3)°.     

六氟环氧丙烷齐聚物的合成

以氟化铯和四乙二醇二甲醚为催化体系,引发六氟环氧丙烷阴离子开环聚合制备六氟环氧丙烷齐聚物。六氟环氧丙烷齐聚物由氟-19核磁共振(19 F-NMR)和红外吸收光谱(IR)进行结构表征。研究了反应温度、六氟环氧丙烷的加料速度和加料量对聚合反应的影响,并分析了聚合机理,优化了制备数均分子量为1 000~2 000g/mol的六氟环氧齐聚物的工艺条件。     

芳基烷基醚及苦杏酸的三相催化合成

本文报道了用自制的三相催化剂——聚苯乙烯支载的聚乙二醇进行三相催化合成芳基烷基醚和苦杏酸.实验结果表明,本催化剂具有较高的催化活性.     

以BHDA为单体的聚酰亚胺的合成及其性能

以降冰片烯二酸酐为原料，通过羰甲酯化反应，酯的水解，酸脱水最后生成双环[2．2．1]庚烷-2-endo，3-endo，5-exo，6-exo-四羧酸2，3：5，6-二酸酐（BHDA）；将制得的酸酐作为二酐单体与4种二胺单体在溶剂中高温溶液缩聚生成4种聚酰亚胺（PI），并对它们的性能进行了测试分析．此类聚酰亚胺具有易溶于强极性有机溶剂（2种含氟元素的也可溶于普通有机溶剂），颜色较浅，较高的热分解温度，玻璃化温度低，易于加工等特性．     

Synthesis and Application of a Novel Perfluorooctylated Citric Acid

A novel perfluorooctylated citric acid was synthesized successfully via allylation of triethyl citrate followed by perfluorooctylation, reduction and hydrolysis. The fabrics treated with this compound showed good oil repellent and moderate water repellent properties; the oil repellent rating and the water repellent score were 6 and 80 respectively. Even after 10 washing cycles, the repellent properties were kept at the same level. The finished fabrics also showed some wrinkle-resistant properties, and the dry wrinkle recovery angle was increased by 53°compared with untreated fabrics. The critical surface energy of the treated fabric surface was 20±1 mN/m. This multifunctional compound also showed good water solubility, which would be beneficial for the environmental protection.     

Synthesis of Novel Fluorinated Acrylate Co-polymers and Their Application on Cotton Fabrics

Two novel fluorinated acrylate monomers 4a and 4b containing perfluorohexyl group were designed and synthesized starting from 4-allylanisole and perfluorohexyl iodide.The monomers 4a and 4b were then copolymerized with octadecyl acrylate and 2-hydroxyethyl acrylate by emulsion polymerization to give copolymers PFA 1 and PFA 2 respectively.The co-polymers were characterized by FT-IR and their heat stability was measured by TGA.The surface properties of PFA 1 and PFA 2 were studied by applying on cotton fabrics.The treated cotton fabrics showed good water-repellent property,and the contact angles for water reached 142° for PFA 1 and 136° for PFA 2.     

疏油/疏水-亲水转换涂层的制备及其转换机理

采用乳液聚合的方法,将溶解性差异较大的两种单体全氟烷基丙烯酸酯(PFAA)和丙烯酸(AA)进行共聚,得到聚(全氟烷基丙烯酸酯-丙烯酸)(P(PFAA-AA)),并用红外光谱(IR)、差示扫描量热法(DSC)和热重分析法(TG)对聚合物的结构和性能进行了表征和分析.将聚合物乳液整理到棉织物上,发现该聚合物涂层具有疏油/疏水-亲水转换功能.正十六烷在织物上的接触角为122°,水在织物上的接触角在30min内从127°减小到33°.对疏油/疏水-亲水转换机理进行了推测,并利用X-射线光电子能谱仪(XPS),通过测试润湿前后织物上涂层不同深度化学元素组成变化,证明转换机理的推测是正确的.     

A Novel Aqueous Polyurethane Containing Short Fluoroalkyl Chains： Synthesis and Application on Cotton Fabrics

IntroductionFluorinated coatings are the most i mportant class ofwater and oil repellent finishing agents for textiles due totheir opti mum perfor mance in lowering the surface freeenergy[1]and i mproving both hydrophobicity andoleophobicity . But in recent years , the fluorocarbonscontaining long perfluoroalkyl chains are facing theproblems such as the persistence ,bioaccumulation,and/ortoxicity in environment and some of them have beenbanned fromthe market[2]. Thus , many efforts have beenma…     

PFOA—APTES自组装双层膜的制备及其拒水拒油性能

采用自组装方法在羟基化硅基底表面制备全氟辛酸/氨基硅烷(PFOA-APTES)自组装双层膜,根据全氟辛酸与氨基硅烷自组装膜末端氨基反应时间的不同,制备3个PFOA-APTES自组装双层膜样品,运用原子力显微镜(AFM)、X-射线光电子能谱(XPS)和接触角测试仪来评价薄膜结构及其拒水拒油性能.结果表明:全氟辛酸与氨基硅烷自组装膜的末端氨基成功发生反应,制备的PFOA-APTES自组装双层膜具有一定拒水拒油效果.