Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Biomacromolecules. 2012 Jan 9;13(1):276-81. doi: 10.1021/bm201616m. Epub 2011 Dec 22.
Imogolite is one of the clay minerals contained in volcanic ash soils. The novel hybrid hydrogels were prepared from imogolite nanofibers and DNA by utilizing strong interaction between the aluminol groups on imogolite surface and phosphate groups of DNA. The hybrid hydrogels of imogolite and DNA were prepared in various feed ratios, and their physicochemical properties and molecular aggregation states were investigated in both dispersion and gel states. The maximum DNA content in the hybrid gels was shown in equivalent molar ratio of imogolite and DNA. The physical properties of the hybrid gels were changed by varying DNA blend ratios. In the dispersion state, the hybrid gels showed a fibrous structure of imogolite, whereas a continuous network structure was observed in pure imogolite, indicating that the hybrid with DNA enhanced the dispersion of imogolite. In the gel state, DNA and imogolite nanofibers formed a 3D network structure.
埃洛石是火山灰土壤中所含的粘土矿物之一。通过利用埃洛石表面的醇铝基团与 DNA 的磷酸基团之间的强相互作用，由埃洛石纳米纤维和 DNA 制备了新型杂化水凝胶。在各种进料比下制备了埃洛石和 DNA 的杂化水凝胶，并在分散体和凝胶状态下研究了它们的物理化学性质和分子聚集状态。在埃洛石和 DNA 的等摩尔比下，杂化凝胶中显示出最大的 DNA 含量。通过改变 DNA 共混比可以改变杂化凝胶的物理性质。在分散状态下，杂化凝胶显示出埃洛石的纤维结构，而在纯埃洛石中观察到连续的网络结构，表明与 DNA 的杂化增强了埃洛石的分散性。在凝胶状态下，DNA 和埃洛石纳米纤维形成了 3D 网络结构。
