德國非金屬礦物學家訪問研究院聯合研究開發中心
2018年4月5日，德國粘土礦物學家和化學化工專家Prof. Josef Breu訪問了青陽非金屬礦研究院聯合研究開發中心，開展有關合成礦物化學化工、礦物功能材料等科技領域的講學、交流和合作。Prof. Josef Breu在研究院聯合研究開發中心作了題為“Synthetic Clay Minerals: Materials Chemistry in Two Dimensions”學術報告（具體內容如下），Prof. Josef Breu的報告持續了近兩小時。報告期間和會后，Prof. Josef Breu熱情和詳細地回答了研究院聯合研究開發中心研究人員提出的一些的基礎科學和技術問題。Prof. Josef Breu和研究院聯合研究開發中心就共同的研究領域作了深入交流。聽取了研究院的工作介紹后，Prof. Josef Breu對非金屬礦研究院的公益科技工作表示了贊賞，欣然地接受邀請擔任研究院的國際科技顧問委員會委員，現場接受了研究院頒發的聘書，并表示和青陽非金屬礦研究院及其聯合研究開發中心進一步合作，支持研究院的科研工作， 共同發展綠色礦山、礦物新材料科學，促進非金屬礦的生態環境友好型地、可持續性的發展和國際間的交流合作。
Title: Synthetic Clay Minerals: Materials Chemistry in Two Dimensions
Speaker: Prof. Josef Breu
Affiliations: Department of Chemistry and Bavarian Polymer Institute,University of Bayreuth (Germany)
Time: 16.:00-17:30 pm
Date: Thursday, 5th, April, 2018
Location: Level 3, Meeting Room, Chemical Building，ZJUT
Abstract:
The intrinsically anisotropic bonding in layered silicates enables spontaneous delamination by osmotic swelling, where continuum electrostatic repulsion separates stacks into individual layers with high precision producing highly ordered lamellar liquid crystalline phases.This requires, however, a homogenous charge density only found with clays synthesized from the melt at temperatures above 1000 K. Utterly controlling homogeneity and thus intracrystalline reactivity, moreover, allows for synthesis of regular heterostructures that may be delaminated into double stacks with any kind of functional molecules sandwhiched between two clay layers. This way emitters may e.g. be oriented in a quasi-epitaxial wayallowing for polarized emission or the heterostacks may be turned into Janus platelets. By pillaring microporous organically pillared silicates (MOPS) are obtained that may be used for gas separation and enantiodiscrimination.These “second generation” layered silicate with aspect ratios of up to 20000 and lateral diameters larger than 2 μm allow for a further quantum leap in relevant material properties when used as fillers in polymer nanocomposites, for instance as ultra-high barriers needed in optoelectronic devices.