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Background Study

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joanne tung

on 5 August 2014

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Transcript of Background Study

-scientific name: Ananas Cosmosus
-tropical fruit
-grows in tropical and sub-tropical countries or regions
-belongs in the Bromeliaceae Family
- grows 1m in length in 1.5 m in width (approximately)
-predominant cultivars of Ananas is called "smooth cayenne"
-contains antioxidants and protease
-various thermoplastic plastics
-fibers that are polymers of propolene
-coefficient that usually expresses numerically degree to which a body or substance posses a particular property
-mega pascals (pressure of force)
-used to emasure stiffness or tensile strength of amterials
-unit for pressure or stress or force
-flexibility of a material
-rich in cellulose
-relatively inexpensive
-has the potential for polymer reinforced composite
-tensile modulus and tensile strength were found to be increasing with fiber content
-tensile modulus and tensile strength witha volume fraction 10.8% are 687.02 + 37.28 MPa respectively
felxural modulus gives a highers value at 2.7% volume fraction
sub-problem 3:
Would the paper be durable enough that water will not be able to tear it easily?
sub-problem 5:
Would the durability of all the papers be the same if we use the same amount of pineapple fibers for all?
sub-problem 2:
Would the age of the plant affect the quality of the pineapple fibers?
Pineapple leaves contain fibers which increase the tensile strength of the material. A quality of paper requires durability and sturdiness, and pineapple leaves contribute to these characteristics
Background Study
Feasibility of the

sub-problem 1:
sub-problem 4:
Would we be able to increase the tensile strength of paper if we used pineapple leaves (fiber from the leaves)?
How much pineapple leaves will be needed to make the paper more durable?
null hypothesis: We would need a different concentration for each type of paper.
alternative hypothesis: the concentration of pineapple fiber would differ because of the different concentration of the original paper
null hypothesis: The age of the plant would not affect the durability of the pineapple fiber
alternative hypothesis: A pineapple plant that is still newly grown would have more durable pineapple fibers
null hypothesis: The resistance of paper would be the same as it was before the experiment was made
alternative hypothesis: The paper would be very durable that water will wouldn't make it tear easily
would the surroundings of the plant affect the quality of the fiber?
null hypothesis: The surrounding would not affect the quality of the pineapple fibers
alternative hypothesis: unhealthy surroundings can cause the pineapple fibers to weaken even if it is still newly grown
null hypothesis: The same amount of fiber concentration would make all the durability of the paper the same
alternative hypothesis: The tensile strength would depend on the original concentration of fibers during the making of paper
Controlled variable:
Dependent variable:
Independent variable:
-type of paper
-place where it is made
-the way of production
-place where plant is grown
-type or kind of pineapple
-tensile strength of paper
-durability of the paper
-how long or how much weight until the paper will tear
-the concentration of the pineapple leaves (fiber) that will make the tensile strength of the paper increase
*as this contains protease, it can be incorporated into foods, which is an advantage to hunan health when taken orally
*pineapple wastes can be utilized to produce methane, animal feed and bromelain
Significance of Study
-find out how effective pineapple leaves would be on the increase of the tensile strength of paper
-to improve the tensile strength of paper
-pineapple leaves are usually thrown out, so we are able to the "waste" for a good purpose instead of throwing it in the trash
-paper bags can be further improved on and can carry heavier weight
-even if its gets wet or moist, it won't break easily
-as of now, malls and shops use paper bags instead of plastic bags because paper bags are healthier for the environment
-if the tensile strength is increased, then we wouldn't have to worry about the risks of paper bags being easily torn when heavy things are placed
-we would be able to achieve a stronger and sturdier type of paper
-allows us to create a better and sturdier product with the use of this paper, like paper bags
-we are able to recycle and reuse this paper more often because it is sturdier and less easily torn compared to the paper bags being produced and sold
Hanna Karlsson, 2007, Some aspects on strength properties composed of different pulps [on line PDF]

Helen Hiebert, 2005, Harvesting Fibers [on line]
052109 Sarah B. Carvalho, Pineaple,

Mechanical properties of pineapple leaf fiber reinforced polypropylene composites, 081304 Elsevier,

Yusri Yusof et al., 2011, Advanced Materials Research, 383-390, 3382,

Production od paper pout of pineapple leaf fiber, Ela Bautista, September 17, 2013,
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