Main points of study in Materials Chemistry and related IT learning materials Dr Patrio Chiu

Topics in Materials Chemistry 2

Topics in Materials Chemistry 3

Curriculum Comparison between NSS, CE and AL for Materials Chemistry Chapter Section in Discovering Chemistry HKCEE HKALE Chapter 56 Naturally occurring polymers 56.1 Introduction 56.2 Cellulose 56.3 Chitin 56.4 Silicates Not included 9.2 Silicon and silicates New contents compared to HKALE (adapted from NSS Chemistry Curriculum): 1. Explain the properties of cellulose and chitin in terms of their structures (Discovering Chemistry 56.2&3) 2. Compare structural features of cellulose and chitin (Discovering Chemistry 56.2&3) 4

Curriculum Comparison between NSS, CE and AL for Materials Chemistry Chapter Section in Discovering Chemistry HKCEE HKALE Chapter 57 Synthetic polymers and plastics 57.1 Plastics in use 57.2 What are polymers? 57.3 Two basic polymerization processes 57.4 Polymeric biomaterials 57.5 Effect of structure on properties 57.6 Plastics fabrication processes 57.7 Importance and problems of recycling plastics 8.1 Plastics 13.1 Synthetic polymers New contents compared to HKALE (adapted from NSS Chemistry Curriculum): 1. Formation and uses of cyanoacrylate (superglue) (Discovering Chemistry 57.3) 2. Polymeric biomaterials such as polylactide (PLA) (Discovering Chemistry 57.4) 5

Curriculum Comparison between NSS, CE and AL for Materials Chemistry Chapter Section in Discovering Chemistry HKCEE HKALE Chapter 58 Metals and alloys 58.1 Metallic crystal structure 58.2 Alloys Not included 4.2 Metallic crystals Alloys New contents compared to HKALE (adopted from NSS Chemistry Curriculum): 1. Explain the differences in properties (e.g. hardness and conductivity) between metals and alloys (Discovering Chemistry 58.2) 2. Relate the uses of alloys (e.g. steel and brass) to their properties as compared with the pure metals from given information (Discovering Chemistry 58.2) 6

Curriculum Comparison between NSS, CE and AL for Materials Chemistry Chapter Section in Discovering Chemistry HKCEE HKALE Chapter 59 Synthetic materials in modern life 59.1 New materials in the modern society 59.2 General features of liquid crystals 59.3 What are ceramics? 59.4 What are nanomaterials? Not included 7

Curriculum Comparison between NSS, CE and AL for Materials Chemistry Chapter Section in Discovering Chemistry HKCEE HKALE Chapter 60 Green chemistry 60.1 Principles of green chemistry 60.2 Green chemistry processes 60.3 Evaluation of production of synthetic material using principles of green chemistry Not included 13.3 Principles of green chemistry for promoting sustainable development, green chemistry practices as exemplified by decaffeination using supercritical carbon dioxide New contents compared to HKALE (adapted from NSS Chemistry Curriculum): 1. Understand the green chemistry practices in the production of synthetic materials including the use of less hazardous chemical synthesis and safer solvents and auxiliaries (Discovering Chemistry 60.2) 2. Evaluate processes for the production of synthetic materials using the principles of green chemistry (Discovering Chemistry 60.3) 8

Materials Chemistry To broaden students’ knowledge and understanding of materials chemistry. Cover many new topics to secondary students. Some of the topics are taught in university previously. Secondary school topics are application-oriented.

Aluminium nitride ceramics Synthetic materials in modern life: What kind of material is used to fabricate a LED? Aluminium nitride ceramics

Crystalline Zirconia (ZrO2) Synthetic materials in modern life: What is the “diamond” like material that is commonly found in store? Crystalline Zirconia (ZrO2)

Synthetic materials in modern life: Characteristics of different materials Silicon carbide, SiC Source: Department of Defence, USA

Synthetic materials in modern life: Liquid crystals What is liquid crystal? How it works?

Synthetic materials in modern life: What is liquid crystal? A liquid crystal molecule Dipole in a liquid crystal molecule

Synthetic materials in modern life: Phases of liquid crystals Nematic phase Smectic phase Cholesteric phase

Synthetic materials in modern life: Liquid Crystal Display Light is unpolarized, we can polarize light vertically using a vertical filter.

Synthetic materials in modern life: Liquid Crystal Display Cholesteric phase A cholesteric liquid crystal can rotate light

Synthetic materials in modern life: Liquid Crystal Display Nematic phase Cholesteric phase When electric field (voltage) is applied, the liquid crystals are aligned.

Synthetic materials in modern life: Liquid Crystal Display CAL Program

Synthetic materials in modern life: Liquid Crystal Thermometer Cholesteric phase

Synthetic materials in modern life: Liquid Crystal Thermometer CAL Program

Synthetic materials in modern life: Nanomaterials C60-buckyball CNT-carbon nanotube

Related material programs in University education in Hong Kong Material programs can be found in: Chemistry department Material Chemistry Engineering department Material Engineering Physics department Applied Physics

Thank you!