公开(公告)号：US11045789B1

公开(公告)日：2021-06-29

申请号：US16898448

申请日：2020-06-11

申请人： GUANGXI UNIVERSITY

发明人： Chengrong Qin ,  Hui He ,  Hongxiang Zhu ,  Lei Wang ,  Hang Zhou ,  Zongyan Quan ,  Zhiping Chen

IPC分类号： B01D53/02 ,  B01J20/26 ,  B01J20/28 ,  B01J20/32 ,  C02F1/28 ,  C02F101/20

摘要： The present invention discloses a biomass intelligent fiber-based amphoteric multifunctional adsorptive material and a preparation method and use thereof. The material is obtained by using a stepwise dual-temperature stimuli-responsive biomass intelligent fiber as a matrix, a crown ether-modified amphoteric hyperbranched polyamine as a functional reagent, and by using a crosslinking agent to directly crosslink and combine the stepwise dual-temperature stimuli-responsive biomass intelligent fiber with the crown ether-modified amphoteric hyperbranched polyamine in one step. The material has a stepwise dual-temperature stimuli-response, high densities of amino group (more than 12 mmol/g) and carboxyl group (5 mmol/g), and nano cavities.

公开(公告)号：US11185796B1

公开(公告)日：2021-11-30

申请号：US17076823

申请日：2020-10-22

申请人： GUANGXI UNIVERSITY

发明人： Chengrong Qin ,  Hui He ,  Lei Wang ,  Hongxiang Zhu ,  Chao Zhao ,  Rimei Chen ,  Zongyan Quan ,  Zhiping Chen

IPC分类号： B01D17/02 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  C02F1/28 ,  C02F101/32

摘要： The present disclosure provides a fast and high-capacity intelligent cellulose-based oil-absorbing material and a preparation method and use thereof. The material includes an intelligent response layer and an adsorption layer. The intelligent response layer is a pH-responsive nanofiber layer with an adjustable pH response performance and is obtained by grafting hyperbranched polycarboxylic acid-modified polyethyleneimine on to carboxylated cellulose nanofibers. The hyperbranched polycarboxylic acid is prepared by melting and polycondensing at a high temperature, using trimethylolpropane as a core, citric acid as a reactive monomer, and p-toluenesulfonic acid as a catalyst. The adsorption layer is prepared by coating ferroferric oxide with the carboxylated cellulose nanofibers to prepare magnetic carboxylated cellulose nanofibers, and then modifying the magnetic carboxylated cellulose nanofibers with hexadecylamine.