Upload
abel-adams
View
217
Download
0
Tags:
Embed Size (px)
Citation preview
Main points of study in Materials ChemistryMaterials Chemistry and
related IT learning materials
Dr Patrio Chiu
1
2
Topics in Materials ChemistryTopics in Materials Chemistry
3
Topics in Materials ChemistryTopics in Materials Chemistry
4
Chapter Section in Discovering Chemistry
HKCEE HKALE
Chapter 56Naturally occurring polymers
56.1 Introduction56.2 Cellulose56.3 Chitin56.4 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)
Curriculum Comparison between NSS, NSS, CE and ALCE and AL for Materials Chemistry
5
Chapter Section in Discovering Chemistry
HKCEE HKALE
Chapter 57Synthetic polymers and plastics
57.1 Plastics in use57.2 What are polymers?57.3 Two basic polymerization
processes57.4 Polymeric biomaterials57.5 Effect of structure on properties57.6 Plastics fabrication processes57.7 Importance and problems of
recycling plastics
8.1Plastics
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)
Curriculum Comparison between NSS, NSS, CE and ALCE and AL for Materials Chemistry
6
Chapter Section in Discovering Chemistry
HKCEE HKALE
Chapter 58Metals and alloys
58.1 Metallic crystal structure
58.2 Alloys
Not included 4.2 Metallic crystalsAlloys
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)
Curriculum Comparison between NSS, NSS, CE and ALCE and AL for Materials Chemistry
7
Chapter Section in Discovering Chemistry
HKCEE HKALE
Chapter 59Synthetic 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 Not included
Curriculum Comparison between NSS, NSS, CE and ALCE and AL for Materials Chemistry
8
Chapter Section in Discovering Chemistry
HKCEE HKALE
Chapter 60Green 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)
Curriculum Comparison between NSS, NSS, CE and ALCE and AL for Materials Chemistry
Materials ChemistryMaterials Chemistry
9
• 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.
Synthetic materials in modern life:Synthetic materials in modern life:What kind of material is used to
fabricate a LED?
10
Aluminium nitride ceramics
Synthetic materials in modern life:Synthetic materials in modern life:What is the “diamond” like material that
is commonly found in store?
11
Crystalline Zirconia (ZrO2)
Synthetic materials in modern life:Synthetic materials in modern life: Characteristics of different materials
12
Silicon carbide, SiC
Source: Department of Defence, USA
Synthetic materials in modern life:Synthetic materials in modern life: Liquid crystals
13
What is liquid crystal?
How it works?
Synthetic materials in modern lifeSynthetic materials in modern life: What is liquid crystal?
14
A liquid crystal molecule
Dipole in a liquid crystal molecule
Synthetic materials in modern life:Synthetic materials in modern life: Phases of liquid crystals
15
Nematicphase
Smecticphase
Cholestericphase
Synthetic materials in modern life:Synthetic materials in modern life: Liquid Crystal Display
16
• Light is unpolarized, we can polarize light vertically using a vertical filter.
Synthetic materials in modern life:Synthetic materials in modern life: Liquid Crystal Display
17
• A cholesteric liquid crystal can rotate light
Cholestericphase
Synthetic materials in modern life:Synthetic materials in modern life: Liquid Crystal Display
18
• When electric field (voltage) is applied, the liquid crystals are aligned.
Cholestericphase
Nematic phase
Synthetic materials in modern life:Synthetic materials in modern life: Liquid Crystal Display CAL Program
19
Synthetic materials in modern life:Synthetic materials in modern life: Liquid Crystal Thermometer
20
Cholesteric phase
Synthetic materials in modern life:Synthetic materials in modern life: Liquid Crystal Thermometer CAL Program
21
Synthetic materials in modern life:Synthetic materials in modern life: Nanomaterials
22
C60-buckyball CNT-carbon nanotube
23
Related material programs inRelated material programs in University educationUniversity education in Hong Kong
• Material programs can be found in:– Chemistry department
• Material Chemistry
– Engineering department• Material Engineering
– Physics department• Applied Physics
Thank you!