Section outline

  • Announcement

    Collapse all Expand all


    Class Schedule

     
    08.30-10.00
    10.00-11.30
    11.30-01.00
    01.00-02.30
    02.30-04.00
    Saturday
     
     
     
     

    Sunday
     A1
     
     
     

    Monday

     
     
     

    Tuesday
     A1
     

     
     
    Wednesday
     

     
     

     

    Counseling Hour

    Sunday        : 11.00 am -12.00 pm
    Monday       : 10.00 am -11.00 pm
    Tuesday       : 10.00 am -11.00 am & 03.00 pm - 05.00 pm
    Wednesday : 10.00 am -05.00 pm


  • Introduction

    Welcome Note:

    Dear Students,
    Assalamu-Alaikum and a very warm welcome to all of you.
    This is Dr. Mainul Morshed,  Assistant Professor at dept. of TE and I am here to conduct your new course Special Wet Process and share and learn something new about the world of Special and Advance Wet Process. So, let's gather knowledge with you all together. Feel free to approach me any kind of problem.
    This course attempts to strengthen students’ knowledge about Supercritical fluid dyeing, Solvent scouring, Solvent dyeing, Foam technology, Color vision, CCMS system, Nano technology, Salt free dyeing etc.
    Thank you very much.
    Regards,

    Course Teacher

    Dr. Mainul Morshed
    Assistant Professor
    Department of Textile Engineering
    Faculty of Engineering
    Daffodil International University

    Cell : +8801406238336
    Email : mainul.te@diu.edu.bd
    Faculty Website : https://faculty.daffodilvarsity.edu.bd/profile/te/kamrul-te.html

    General Course Description : 

    • Course Title: Specialized Wet Process
    • Course Code: TE 421
    • Credit Hours: 3 (Theory, 3 contact hours per week) 
    • Prerequisite: 0723-217, TE 313, TE 337
    • Course Level: Level 4 Term 1

    Course Outcomes:

    After the completion of this course students will be able to-

    1. Describe innovative wet processes such as SCF dyeing in textiles.
    2. Demonstrate about the environmental sustainability with the use of foam/solvents to reduce water consumption in dyeing　　

    3. Analyze color and interpret its different theories.

    4. Explain and analyze problems during color formulation and color matching using computers among various samples in dyeing industries of Bangladesh.

    5. Develop ideas about new dyeing technology for salt free reactive dyeing on cotton, eco processing, nano technology etc.
    6. Identify and compare yarn dyeing machines, methods and also conventional and modern garments washing techniques.


    Mapping/Alignment of CLOs/COs with Program Learning Outcomes(PLO/PO):


     

    PO1

    PO2

    PO3

    PO4

    PO5

    PO6

    PO7

    PO8

    PO9

    PO10

    PO11

    PO12

    CO 1


     √

     

     

     

     


     

     

     

     


    CO 2

     

     

     √

     

     

     


     

     

     

     


    CO 3


    √

     

     

     

     

     

     

     

     

     

     

    CO 4


    √


     


     

     

     

     

     

     

     



























  • Library Resources & References

    I Found this Amazing Free Presentation Creative Resource Education Animated GIF Icon Pack on Discover Template. Tr… | Free keynote template, Animated gif, Icon pack

  • Assignment


    Assignment Title:  Recipe Calculations (Submission date: 25/03/2025)

     

    Regulations:

    # The Assignment should be submitted soft copy first on or before the respective due Date.

    # For late submission there will be negative marking.

    # Assignment must be submitted in .exe format.

    #Everyone must follow the prescribed guideline to do the assignment

    # It Should be submitted by each and every single student by him/herself.

    # Any kinds of copy from other classmate's assignment would cause negative marking.

    # Late submission on BLC will also cause negative marking.

    • assign icon
      Assignment Submission
      Opened: Wednesday, 1 January 2025, 12:00 AM
      Due: Friday, 25 April 2025, 11:59 PM
      Students must
      View

      Submit your assignment here.

  • Presentation

    Presentation Date: 28/02/2025


    Regulations:

    # Each group will select there own topic.

    # Presentation will conduct group wise.

    # Total number of groups should be 5 for each section.

    # Each group should contain minimum of 6 persons.

    # Each group will get 10 minutes to finish there presentation.

    # There will be no second option for the presentation.

    # All male students must present themselves in formal dress up; for female students no dress code is applicable.

    # Every single group member must submit the soft copy (.ppt version) of his/her assignment on or before 15/4/2025 on BLC. 

    # Late submission on BLC will cause negative marking.

    # For online soft copy submission, students are must follow the criteria:

    File name should be (Section + Presentation topic)


    • assign icon
      Presentation Submission Assignment
      Opened: Wednesday, 8 January 2025, 12:00 AM
      Due: Wednesday, 19 February 2025, 11:59 PM
      Students must
      Mark as done
      Every single member must submit his own PPT slides here.

  • Basic Concepts of Colors


    Chapter Outcomes :

    After completing this chapter Students can,

    1. To explain Human vision and color
    2. To explain defective color vision
    3. To assume Metamerism and Its classification
    4. Light sources for color matching
    5. To analyze color and its attributes, additive or light theory, subtractive or pigment theory
    6. To interpret CIE LAB theory and color space, CIE LCH theory, Color difference, CMC theory

  • Dyestuff Recognition





    Course objectives:

    • Understand dye chemistry and structure-property relationships.

    • Classify dyes by type, application, and origin (natural/synthetic).

    • Identify dyes using spectroscopic (UV-Vis, IR, NMR) and chromatographic (TLC, HPLC) techniques.

    • Apply color theory and use tools like spectrophotometers for color measurement.

    • Demonstrate dye application methods for textiles, paper, and plastics.

    • Evaluate environmental impacts and follow safety protocols for dye handling.

    • Perform quality control tests for dye fastness, stability, and compatibility.

    • Explore historical and cultural significance of dyes and traditional techniques.

    • Solve problems related to dye selection, application, and performance.

    • Communicate findings and document experiments effectively.



    • resource icon
      Dyestuff Recognition File
      Students must
      Mark as done
    • resource icon
      Functional groups of dyes File
      Students must
      Mark as done
    • assign icon
      H.W. Assignment
      Opened: Wednesday, 19 February 2025, 12:00 AM
      Due: Wednesday, 26 February 2025, 12:00 AM
      Students must
      Mark as done

      Please provide the list of electron donating and electron withdrawing groups.

  • Lecture Module 1 : Supercritical Fluid Dyeing



    Chapter Outcomes :

    After completing this chapter Students can,

    1. To demonstrate about supercritical fluids (SCFs) and its Properties
    2. To describe necessity of SCF dyeing, Advantages and
    3. To explain limitations of Supercritical CO2 Dyeing.

    • resource icon
      Supercritical Fluid Dyeing File
      Students must
      Mark as done
    • url icon
      Water less dyeing of POLYESTER:POWER OF SUPER CRITICAL CARBON DIOXIDE FLUIDS URL
      Students must
      Mark as done

      Have you ever wondered how your favorite polyester clothes get their vibrant colors? Well, the traditional process involves gallons of water and harsh chemicals, raising environmental concerns. But what if there was a cleaner, greener way to dye polyester? Enter supercritical carbon dioxide dyeing! 1. What is Supercritical CO2 Dyeing of Polyester? Imagine dyeing fabric without a single drop of water. That's the magic of supercritical CO2 dyeing. Supercritical CO2 is a state where the gas behaves like both a liquid and a gas, dissolving dyes and penetrating polyester fibers. This innovative technique offers a sustainable alternative to conventional dyeing. 2. The Discovery and Pioneers: This revolutionary process wasn't discovered overnight. Early research on CO2 dyeing began in the 1980s, with scientists like Dr. Richard Fox and Dr. Roger Dean leading the way. Their groundbreaking work laid the foundation for companies like DyeCoo, which developed the first commercially viable supercritical CO2 dyeing 3. The Mechanism: Waterless Wonders: Unlike traditional water-based dyeing, which requires high temperatures and dispersing agents, supercritical CO2 creates a unique environment. The CO2 acts as both the solvent and the dye carrier, swelling the polyester fibers and allowing the dye molecules to penetrate deeply. This results in excellent colorfastness and vibrant shades. 4. Advantages: Going Green with Color: Supercritical CO2 dyeing boasts numerous advantages over traditional methods: Reduced Water Usage: Saves gallons of water per kilogram of fabric, minimizing water pollution and resource depletion. Lower Energy Consumption: Operates at lower temperatures compared to conventional dyeing, saving energy and reducing greenhouse gas emissions. Chemical-Free Process: Eliminates the need for harsh dispersing agents and other chemicals, improving worker safety and environmental impact. Superior Colorfastness: Dyes penetrate deeper, resulting in vibrant, long-lasting colors that resist fading. 5. No Process is Perfect: Exploring the Disadvantages: While supercritical CO2 dyeing offers significant benefits, it also comes with some challenges: High Initial Investment: The equipment and process require a higher initial investment compared to traditional methods. Limited Color Range: Not all dyes are compatible with CO2, potentially restricting color options.

  • Lecture Module 2 : Application of Solvent in Wet Processing


    Chapter Outcomes :

    After completing this chapter Students can,

    1. To identify Solvents and Its’ ideal requirements for textile scouring and dyeing, 
    2. To demonstrate solvent scouring process, benefits
    3. To describe limitations of solvent scouring and dyeing, 
    4. To explain Solvent recovery process.

  • Class Test 1


    The first class test of Special Wet Class will held on the following dates on the respective class hours.

    please check and take preparation according to the class sections.

    CLass Test Schedule:

    04/02/25


    Rules and Regulations

    Marks: 15

    Duration of Class Test: 30 minutes

     

    1st CT Syllabus

    Chapter 1: Basic concepts of colors

    Chapter 2: Metamerism


  • Quiz 02


    The 2nd class test of Special Wet Class will held on the following dates on the respective class hours.

    please check and take preparation according to the class sections.

    CLass Test Schedule:

    24/02/25

     

    Rules and Regulations

    Marks: 15

    Duration of Class Test: 30 minutes

     

    2nd CT Syllabus

    Chapter 3: Chemical constitution of dye

    Chapter 4: Functional groups of dyes


  • Midterm Examination


    Midterm Syllabus:

    Chapter 1. Basic Concepts of colors

    Chapter 2. Metamerism

    Chapter 3. CCMS

    Chapter 4. Chemical Constitution of Dyes

    Chapter 5. Functional groups of dyes


    Instructions for Midterm Exam : 

    Midterm Exam Assessment Plan : 

    There will be 
    Short Question & Broad Question :

    Total Marks = 25
    Date & Time: 11/03/2025 at 11.30 am

    Midterm Exam Preparation

    • Discuss with each other and find the problems regarding upcoming Midterm Examination
    • If you have any problems that you can not solve, then inform me and we will discuss it in the classroom.