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Tianjin University Form for Summary of Literature Reading: 学期第 篇文献 Semester 3rd No. 01

This literature summarizes research on synthesizing citric acid crosslinked polyvinyl alcohol (PVA)/tapioca starch bioplastic films reinforced with grafted cellulose. Cellulose was grafted with palmitic acid, decreasing its crystallinity. PVA films were crosslinked with tapioca starch using activated citric acid and reinforced with cellulose and grafted cellulose. Characterization showed that transparency and strength decreased with additions, while swelling and solubility decreased except for grafted cellulose due to palmitic acid. The bioplastic films showed potential as an alternative to petroleum-based plastics like LDPE.

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15 views3 pages

Tianjin University Form for Summary of Literature Reading: 学期第 篇文献 Semester 3rd No. 01

This literature summarizes research on synthesizing citric acid crosslinked polyvinyl alcohol (PVA)/tapioca starch bioplastic films reinforced with grafted cellulose. Cellulose was grafted with palmitic acid, decreasing its crystallinity. PVA films were crosslinked with tapioca starch using activated citric acid and reinforced with cellulose and grafted cellulose. Characterization showed that transparency and strength decreased with additions, while swelling and solubility decreased except for grafted cellulose due to palmitic acid. The bioplastic films showed potential as an alternative to petroleum-based plastics like LDPE.

Uploaded by

rupesh chakma
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© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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天津大学研究生文献阅读记录表

Tianjin University
Form for Summary of Literature Reading
学期第 篇文献

Semester 3rd No. 01


姓名 Name Rupesh Chakma 学号 Student Number 6219000214
文献题目 Synthesis of Citric Acid Crosslinked PVA/Tapioca Starch Bioplastic
Article Title Reinforced with Grafted Cellulose

In this literature, cellulose was grafted by palmitic acid with a yield of 61 ± 14 %. It


was found that the crystallinity of cellulose decreased after grafting. PVA/starch
bioplastic films were synthesized from PVA crosslinked with tapioca starch by the
addition of activated citric acid as a crosslinker and then reinforced with the addition of
cellulose and grafted cellulose. Activated citric acid was produced by converting the
acid into a more reactive anhydrous state through heating. They carried out
characterization to evaluate chemical and physical properties of the composite. Such as
FTIR, tensile test, swelling test, and solubility test were also carried out. It was seen
that transparency of the plastics increased after the addition of starch, and further
文 increased after the addition of cellulose. Due to having excessive OH groups on its
献 backbone structure, PVA shows highly water solubility.
核
Crosslinking with starch and the strengthening with cellulose were able to reduce the
心 swelling and solubility. However, the addition of grafted cellulose was unable to
内 improve swelling and solubility because of the palmitic acid disturbing the plastic
容 network. Furthermore, it was observed that the addition of starch, cellulose, and grafted
cellulose, respectively decreased the tensile strength of the original PVA films. Grafted
Core Content

cellulose was proven ineffective in decreasing the swelling power and solubility in thin
hydrophilic plastic films. Crosslinked PVA/starch films shows potential to become an
alternative for LDPE plastics.

（可另附页）
This research work directly relates with my research plan. Because, I will do my
research also on the topic of PVA. PVA is a highly water soluble due to having
numerous hydrophilic hydroxyl groups(-OH). Unlike maximum petro-synthetic
polymers PVA is a biodegradable, nontoxic with having potential application of many
areas such as pharmaceutical, biomedical, building construction, Intelligent sensor,
packaging, adhesive and additive of various materials. So, now PVA draws a great
attraction due to its smart properties. Being environmental concern researchers are
对 trying to reduce the use of petro-polymer which have serious negative impact on
本 environment.
人
It is very crystal clear that today’s world is moving towards the alternative of
研
non-degradable petro-synthetic plastics to get ride of the environmental curse like white
究 pollutions. So, production of biodegradable polymers is stunningly growing in recent
课 decades. The proof can be found if we assess global production rate of
题 biodegradable(bioplastics) polymers. For example, the global tendency of increasing
production rate of bioplastics is more prospective. By 2018 in China only the net
的 production of bioplastics is about 5.44 billion RMB which almost 21.13% higher than
启 prior 2017. Concurrently, at present annual global bioplastics production is almost
发 about to 1% of 335 million tons of total plastics production. Even, production of
semi-biodegradable polymer also increases parallelly form 1.20 million tons to 1.33
Enlightenment to My Research Topic

million tons by 2018 to 2023

（可另附页）
First author
F. G. Nugroho
Corresponding author
N. M. Nizardo and E. Saepudin
Journal
International Symposium on Current Progress in Mathematics and Sciences
DOI
https://doi.org/10.1063/5.0010357
Annual issue number
1 June 2020
Impact factor
4.3
Keywords
Citric acid, poly(vinyl alcohol), tapioca starch, cellulose, crosslinking

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