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Synthesis, Characterization and Application of Polymer Based Membranes by Using Modified Zeolite Particles

Thesis Info

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Author

Muntha, Sedra Tul

Program

PhD

Institute

Quaid-I-Azam University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Physical Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10742/1/Sedra%20Tul%20Muntha_Physical_Chemistry_2019_QAU_25.04.2019.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725065632

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Membrane technology has been extensively explored as fascinating separation technique due to its energy efficient nature. This work concerns with the synthesis of five series of polymer membranes namely Polysulfone/Polyimide/Modified Zeolite mixed matrix membrane (MMM), Polysulfone/Polyimide/Silica nanocomposite membranes (NCM), Polysulfone/Polyimide-Silica- Modified Zeolite NCM, PIM-1/Modified Zeolite MMM and PIM-1/Modified zeolite thin-film composite membranes by solution casting method. Modified zeolite (MZ) filler was added to polymer matrix for tight packing of polymer layers. By adding silica (SiO2) and MZ filler to polymer matrix, the membranes exhibit properties of both organic and inorganic membranes. Polyimide and Polymer of intrinsic microporosity-1 (PIM-1) were synthesized by condensation reactions. Morphology and structure of fabricated samples were investigated by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD). Mechanical and thermal properties of nanocomposite membranes were also investigated. Polysulfone based membranes were investigated for antibacterial properties while PIM-1/Modified Zeolite MMMs were investigated for CO2/N2 separation. Thermal and mechanical properties of fabricated membranes were enhanced by filler addition due to fine compatibility and strong interaction of polymer and filler. Diffrential scanning calorimetry analysis (DSC) indicated increase in glass transition temperature (Tg) with increasing filler concentration. Better DSC specifications were evaluated for 10 wt% MZ content. Thermogravimetric analysis (TGA) complimented DSC results. Combining effects of Polysulfone (PSf), Polyimide (PI), SiO2 and MZ enhanced the antibacterial properties however, better antibacterial results were observed for 10 wt% nanocomposite in all cases. Integration of MZ filler in PIM-1 improved the CO2 permeability.Moreover, considerable increase in CO2 permeability was evaluated for alcohol treated PIM-1/MZ MMM as alcohol wash opens up the free volume.Effect of membrane’s thickness on gaseous flux was evaluated by fabrication of thin-film composite membrane (TFC) which improved the aging properties for TFC membranes as significant arrest was observed in permeability loss for TFC membranes. In all cases, CO2 permeability was observed to increase with increasing MZ concentration.Thus, we speculate that the permeation properties are adequately enhanced due to strong interaction and fine compatibility of MZ filler in PIM-1 matrix.
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منزلِ شوق (نظم)

دہر کی نفرتوں کا ستایا ہوں میں
جستجو ہے مجھے الفت و مہر کی
ایک یوٹوپیائی جہاں ہو جہاں
فاختہ کا نشیمن سلامت رہے
اس کی پرواز پر کوئی پہرہ نہ ہو
ہر سو چاہت کے، احساس کے گل کھلیں
امن کا گیت گائیں جہاں پر سبھی
میری تو منزلِ شوق ہے بس یہی

مکالمہ بین المذاہب شرائط، مقاصد جديد

Now the whole world is the global village. The science has brought revolution in every field of life. Man has made a lot of things for his comforts, discomforts, reliefs and destruction. Now the time has come for us to take evolutionary steps to save us from giant’s destruction, terrorism, extremism, intolerance and unrest which are the machinations of complete annihilation over the earth, which needs cosmopolitanism on our part For this purpose, dialogue can play a vital role. People belongs to different civilizations, cultures, societies, nations and religions can sit around the table beings humans and can solve religious, political, geo political and economical problems by enhancing mutuality and common understanding. Dialogical aim should be to avoid clash of civilizations and peace for everyone. Terrorism and extremism should be stopped and we should promulgate coexistence and peace for whole human community. Purpose should be to serve the humanity. We should promote love, peace, respect for the other religions; serve humanity create equality and equity among human beings. This should be safety of present and coming generation. We should pay our role as super creature and thinking creature; super. The barriers which come across while promulgating cosmopolitanism and expatriation is seemed to be is the double standard of the west, that promotes colonialism, terrorism, extremism and economical support of missionaries and these things are the real problems for those human beings who take serious trenchant and serious efforts to achieve dialogical goals cannot achieve it. The role western media plays; is not supportive to this nation. Western world especially American should use her hegemony to make world worth living and worth seeing to the coming generation.

Factors Affecting Womens Share in Family Inheritance in District Peshawar, Khyber Pakhtunkhwa

The present study was conducted to find out factors affecting the women’s share in family inheritance in District Peshawar. It was based on the assumption made from Structural Oppression Feminism Theory that inheritance denial to women in Pakistani society is a common phenomena where male economic interest in family inheritance is directly or indirectly supported by patriarchy centered inheritance norms, practices and legal, religious and social institutions. Data for the study were collected through a pretested interview schedule from 384 sampled respondents belonging to both urban and rural areas of District Peshawar, Khyber Pakhtunkhwa. Findings of the study are based on univariate and bivariate analysis of data. The findings of the study confirmed the denial to women in family inheritance as a common phenomena in the study area. Many respondents did not even consider the denial as a violation of female’s basic human rights. Hence, this was found a common phenomena among all socioeconomic groups. Almost three fourth of the total respondents did not share inheritance with females at all while those who gave full share constituted only 2.3 percent. The rest tried to exploit the females and their in-laws by giving a small piece of land or little amount of money. A number of factors were found to affect the phenomena. Female inheritance denial was found significantly associated with the families where land and property were considered as the critical and fundamental economic resources and assets for males who wanted to keep it within the family to control both the resources and the females. Legal and religious institutions, despite having clear rules and regulations, could not protect female inheritance rights. They were both male dominated and found favoring the males. The females, on their part, could not contact the legal institutions, especially, due to lengthy and cumbersome procedure as well as high social and economic cost on litigation. Similarly, mosque and religious leaders did not motivate the respondents to share inheritance with their females. In fact, the male claim on family inheritance was further strengthened by the prevalence of patriarchy based inheritance norms, practices, unlawful methods and complicated procedures to get the share in inheritance. A significant association of female inheritance rights denial in this regard was also found with the patriarchal based perceptions that emanated females as subordinate, land and property belong to family where male got the primary rights and females silence is a proper behavior in inheritance share cases. The family and social norms in one way or other supported these ideas. Special marriages including exchange, paternal cousins or with the children of inheritance entitled females were also arranged to keep land and property within the family. Helping females and dowry was found as a substitute for inheritance share. The community level social institutions such as family and Jirga also did not play a positive role and supported the male interest. Similarly, media, political parties, NGOs and educational institutions, despite having potential and authority, could not address to the extent it deserved and demanded. The results partially endorsed both the socialist feminism and intersectionality theories of structural feminism. The study concludes that for general understanding and acceptance at community and society level, the female inheritance denial was/is a basic but an ignored issue. At community level, it should be highlighted through mosque, religious leaders and community based organizations. Similarly, the political parties, media and educational institutions should also be used as channels for disseminating relative knowledge for bringing positive change in the attitude of locals over the issue under consideration. The study recommends further that there is no need for further legislation; existing laws should be implemented overwhelmingly. All customary laws and practices having any role in female inheritance denial should be dealt strictly in accordance with the prevalent law.