title: Preparation of bulk sodium carboxymethyl cellulose aerogels with tunable morphology.
abstract: Homogeneous and bulk carboxymethyl cellulose hydrogel and aerogel were prepared by a novel process, using Fe(3+) and d-(+)-gluconic acid-lactone as cross-linker and releasing agent, respectively. The results showed that the mass fraction of Fe(3+) has a great effect on CMC aerogels' structure, crystallization and morphology. By adjusting the mass fraction of Fe(3+), granular, three-dimensional network and rod-like morphology were obtained, responding to varying density and porosity. The aerogel had low density (low to 0.0568 g/cm(3)) and high porosity (up to 90.45%). Meantime. Combination patterns between carboxylate ion and iron ion were checked by FTIR. Furthermore, with the addition of Fe(3+), lattice mismatch of CMC emerged and led to decreasing crystalline degree and thermal stability. This work would play an important role in the handy and extensive application of CMC aerogels.
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, No. 58, Renmin Avenue, Haikou 570228, Hainan, China.
authors.forename: Runjun
authors.initials: R
authors.lastname: Lin
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, No. 58, Renmin Avenue, Haikou 570228, Hainan, China.
authors.forename: Ang
authors.initials: A
authors.lastname: Li
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, No. 58, Renmin Avenue, Haikou 570228, Hainan, China. Electronic address: lulingbin@126.com.
authors.forename: Lingbin
authors.initials: L
authors.lastname: Lu
authors.affiliation: Key Lab of Advanced Materials of Tropical Island Resources, Ministry of Education, College of Materials and Chemical Engineering, Hainan University, No. 58, Renmin Avenue, Haikou 570228, Hainan, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Cao
mesh_terms: D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D007501:Iron; D002266:Carboxymethylcellulose Sodium
keywords: CMC aerogel; Coordination; Iron ion; Tunable morphology