Controlled Wettability of Polymers via Environmental Crazing  

作　　者：Alena Yu.Yarysheva Larisa M.Yarysheva Fedor V.Drozdov Olga V.Arzhakova Aziz M.Muzafarov 

机构地区：[1]Faculty of Chemistry,Lomonosov Moscow State University,LeninskieGory 1-3,Moscow 119991,Russia [2]Institute of Synthetic Polymer Materials RAS,ul.Profsoyuznaya 70,Moscow 117393,Rusia

出　　处：《Chinese Journal of Polymer Science》2022年第10期1307-1314,I0012,共9页高分子科学（英文版）

基　　金：funding from the Ministry of Science and Higher Education of the Russian Federation(Agreement No.075-15-2020-794)。

摘　　要：This work highlights the benefits of environmental crazing for the control over the hydrophilic-lipophilic balance of glassy amorphous and semicrystalline polymers:poly(ethylene terephthalate)(PET)and biodegradable polycaprolactone(PCL).Task-oriented encapsulation of diverse commercial and natural hydrophilic(polyethyleneoxide,polyvinylpyrrolidone,gelatin)and hydrophobic guest additives(perfluoroorgano siloxanes,water-repellent impregnation)into mesoporous host polymer(PET,PCL)matrixes allows targeted control over the wettability of the resultant nanocomposite materials.Depending on the nature of the guest additive,the properties of the modified polymers can be varied from hydrophilic to hydrophobic:contact angle(CA)of PET can be adjusted from 47_(⊥)/38_(||)to 130_(⊥)/117_(||)°(for initial PET,CA=82°)and CA of PCL from 40°to 114°(for initial PCL CA=75°).The unique benefits of environmental crazing for structural modification are related to the universal character of this approach which can be applied to a broad range of polymers and allows preparation of diverse high-performance materials with tunable hydrophilic-lipophilic balance.

关 键 词：WETTABILITY Hydrophilic-hydrophobic balance Contact angle Environmental crazing Poly(ethylene terephthalate) POLYCAPROLACTONE 

分 类 号：O631.2[理学—高分子化学]