Mohammad Zuber

Publications (31) View all

• Article: Properties of the modified cellulosic fabrics using polyurethane acrylate copolymers.

  Shazia Tabasum, Mohammad Zuber, Abdul Jabbar, Khalid Mahmood Zia
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  ABSTRACT: Polyurethane acrylate copolymers (PAC) were synthesized via emulsion polymerization following three step synthesis process using toluene-2,4-diisocyanate, hydroxy terminated poly(caprolactone) diol, 2-hydroxyethylacrylate (HEA) and butyl acrylate (BuA). Structural characteristics of the synthesized polyurethane acrylate copolymer (PAC) were studied using Fourier Transform Infrared (FT-IR) spectrophotometer and are with accordance with the proposed PAC structure. The physicochemical properties such as solid contents (%), tackiness, film appearance and emulsion stability were studied, discussed and co-related with other findings. The plain weave poly-cotton printed fabrics after application of PAC was evaluated applying colorfastness standard test method. The results revealed that emulsion stability is the main controlling factor of the synthesized material in order to get better applications and properties. The emulsion stability of the synthesized material increased with increase in molecular weight of the polycaprolactone diol.
  Carbohydrate polymers. 05/2013; 94(2):866-73.
• Article: Chitin based polyurethanes using hydroxyl terminated polybutadiene, Part I: Molecular engineering.

  Khalid Mahmood Zia, Kashif Mahmood, Mohammad Zuber, Tahir Jamil, Muhammad Shafiq
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  ABSTRACT: Chitin based polyurethanes (PUs) using hydroxyl terminated polybutadiene (HTPB) as soft segment were prepared and the structure of the proposed PU was confirmed using FTIR spectrometer. PU prepolymer was prepared using HTPB and toluene-2,4-diisocyanate (TDI), and the chain was extended with different proportions of 1,4-butane diol (BDO) and chitin. During the detailed FTIR study, it was observed that tri-functional character of chitin results in the formation of network structure due to crosslinking of the material, whereas bi-functional aliphatic diol based polyurethane produced linear PU. Hydrogen bonding between the hard segments was identified by the IR spectroscopy. The scanning electron microscope (SEM) analysis also confirmed the cross-linked structure.
  International journal of biological macromolecules 05/2013; · 2.37 Impact Factor
• Article: Morphological studies of chitin based polyurethanes using hydroxyl terminated polybutadiene.

  Khalid Mahmood Zia, Naureen Aziz Qureshi, Mohammad Mujahid, Kashif Mahmood, Mohammad Zuber
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  ABSTRACT: Chitin-hydroxyl terminated polybutadiene (HTPB) based polyurethane (PU) was prepared and structure of the pre-designed PU was confirmed using FT-IR spectrometer. The FT-IR analysis confirmed that the crosslinking density increased with increasing the chitin contents in the final PU. During the detailed FTIR study, it was observed that tri-functional character of chitin is responsible for the formation of network structure. The scanning electron microscope (SEM) analysis also confirmed the cross-linked structure of the material. The amount of carbon, nitrogen and oxygen elements obtained from EDX-SEM microanalysis was also supported the results. The resistance in solubility against the solvent also confirmed the crosslinking behavior of the prepared polyurethane.
  International journal of biological macromolecules 04/2013; · 2.37 Impact Factor
• Article: Antimicrobial and pilling evaluation of the modified cellulosic fabrics using polyurethane acrylate copolymers.

  Shazia Tabasum, Mohammad Zuber, Tahir Jamil, Muhammad Shahid, Rizwan Hussain
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  ABSTRACT: Polyurethane acrylate copolymers (PAC) were synthesized by three step synthesis process via emulsion polymerization using toluene-2,4-diisocyanate, hydroxy terminated poly (caprolactone) diol (PCL), 2-hydroxyethylacrylate (HEA) and butyl acrylate (BuA). The proposed structure of the synthesized polyurethane acrylate copolymer (PAC) was confirmed using Fourier Transform Infrared (FT-IR) spectrophotometer. The pilling characteristic and antimicrobial activities of the plain weave poly-cotton grey, white, printed and dyed fabric swatches after application of PAC were evaluated. The results revealed that by increasing the molecular weight of PCL in the synthesized PAC samples, the antimicrobial activities increased and this behavior was interpreted in term of increasing hydrophilic character. An increase in pilling ratings of the treated samples has been observed by increasing the molecular weight of the polycaprolactone diols in the synthesized PAC samples.
  International journal of biological macromolecules 02/2013; · 2.37 Impact Factor
• Article: Natural occurrence of aflatoxins and ochratoxin A in commercial chilli and chilli sauce samples

  Shahzad Zafar Iqbal, Muhammad Rafique Asi, Mohammad Zuber, Javed Akhtar, Muhammad Jawwad Saif
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  ABSTRACT: Total 170 samples of chillies (chilli sauce, crushed chilli and powdered chilli) were analyzed by HPLC coupled with fluorescence detector. AFs were detected in 39, 59 and 56% of chilli sauce, crushed chilli and chilli powder samples from open market compared with 29, 54 and 58% samples respectively, from food restaurants. OTA was found 5 (19%), 11 (38%) and 13 (38%), in chilli sauce, crushed chilli and chilli powder from open market compared to 4 (17%), 14 (50%), and 12 (41%) samples respectively, from food restaurants. About 12, 27 and 35% chilli sauce, crushed chilli and powdered chilli samples from open market were found above the European Union (EU) limit for total AFs compared to 8, 32, and 41% samples from food restaurants. The daily intakes of AFs and OTA were 3.3 and 2 μg/kg, respectively.
  Food Control. 01/2013; 30(2):621-625.