Synthesis of biodegradable plastic of Nikawa

Kobe Municipal High School of Science and Technology

Introduction
Awareness of gibier

Agricultural damage in Hyogo(Unit: thousand yen)

I don’t know

Name onlyI know

444,777
1) “Hyogo Prefectural Government, Agricultural and Forestry Damage Caused by Wild Birds andhttps://web.pref.hyogo.lg.jp/nk27/nourinngyouhigaitoukei.html (reference2022-05-19)

Animals, FY2020 Edition", 18 May 2022.

2) "Statistics on Agriculture, Forestry and Fisheries: Survey on Consumers' Attitudes and Intentions towards Wild Game Meat", 1991, 1, 23,https://www.maff.go.jp/kanto/to_jyo/networkmonitorjigyo/attach/pdf/index-1.pdf(reference2022-05-18)

Introduction
Image of gibier.

Smelly, likely to be.

Safety concerns.
Meat is tough, looks tough．

3) "Statistics on Agriculture, Forestry and Fisheries: Consumer attitudes and intentions regarding wild game (wild game meat)", 1991, 1, 23,https://www.maff.go.jp/kanto/to_jyo/networkmonitorjigyo/attach/pdf/index-1.pdf(reference2022-05-18)

Introduction
Trends in the production of plastics

20倍増加4) PLASTICS JAPAN.com Marine plastic litter problem (Report 1) 16 Jul 2017.
https://plastics-japan.com/archives/2875/amp(reference2022-05-19)

Future Plan
Collection of plastics

5) “PILOT Terra Recycle LOFT Recovery and Recycling Program
Start recycling pens 2022."https://www.loft.co.jp/news release/47177620939af8334a804f20f9c207957e0312b1.pdf(ref 2022-06-01)

Introduction
What is Nikawa・・・Gelatine made by boiling animal skins, tendons,bones and connective tissue in water, thenconcentrating, cooling and coagulating thesolution. It is mainly used as an adhesive andpainting material.

6) "Minowa Lacquer Co.
https://urusiya.ocnk.net/product/765(reference2022-05-07)

7) "Asahiyo Chemical Co.
https://www.asahi-gelatine.co.jp/cn18/sanzenbon_j.html(reference2022-05-07)

This Work
Environmentally friendly pens

Method＜Experiment 1.＞ Three-point bending test

Method＜Experiment 1.＞ Disassembly experiment

約9cm

Experiment 1 Graph of results
Biodegradable plastics Graph of average durability
2000

1800

1757

Weight of weights(g)

1600

1400
1200

1030

1000
800
600

645

758

671

543
421

413

393

400
200
200
040%の濃さのにかわ溶液
40％ Nikawa

solution

30%の濃さのにかわ溶液
30％ Nikawasolution

20%の濃さのにかわ溶液
20％ Nikawa

solution

和紙のみJapanesepaper
onlyExperiment 2 Graph of results
Biodegradable plastics buried in soil for two weeks Result.
0.5
0.43
0.4weight(g)

0.34
0.3

0.27
0.22

0.2

0.11
0.1

0.06

0
和紙を４巻 paper
4 rolls of Japanese

3 rolls of和紙を３巻Japanese paper
土に埋める前Beforeburying in theground

土に埋めたあとAfter burying inthe ground

和紙を２巻
2 rollsof Japanese paper

Experiment 2 Graph of results
Biodegradable plastics buried in soil for two weeks Result.
0.50.450.43

0.4

Weight(g)0.350.320.3

0.26

0.25

0.2
0.15

0.13

0.1
0.05

000

4 rolls和紙を４巻
of Japanese paper 3 rolls of Japanese
和紙を３巻
paper
Before burying in
土に埋める前the ground

Afterburying in the
土に埋めたあとground2 rolls 和紙を２巻
of Japanese paper

Discussion

Higher concentrations of Nikawa and a higher number of windings wereconsidered to be stronger.

We thought that it would decompose in the sea and that it would decompose fasterthan in the ground.

Future Plan
Degradation experiments with seawater using magnetic stirrers.

References1) “Hyogo Prefectural Government, Agricultural and Forestry Damage Caused by Wild Birds and Animals,
FY2020Edition", 18 May 2022.
https://web.pref.hyogo.lg.jp/nk27/nourinngyouhigaitoukei.html (reference2022-05-19)
2) "Statistics on Agriculture, Forestry and Fisheries: Survey on Consumers' Attitudes and Intentions towards Wild Game Meat", 1991, 1, 23,https://www.maff.go.jp/kanto/to_jyo/networkmonitorjigyo/attach/pdf/index-1.pdf(reference2022-05-18)
3) "Statistics on Agriculture, Forestry and Fisheries: Consumer attitudes and intentions regarding wild game(wild game meat)", 1991, 1, 23,https://www.maff.go.jp/kanto/to_jyo/networkmonitorjigyo/attach/pdf/index-1.pdf(reference2022-05-18)
4) PLASTICS JAPAN.com Marine plastic litter problem (Report 1) 16 Jul 2017.
https://plastics-japan.com/archives/2875/amp(reference2022-05-19)
5) “PILOT Terra Recycle LOFT Recovery and Recycling Program
Start recycling pens 2022."https://www.loft.co.jp/news release/47177620939af8334a804f20f9c207957e0312b1.pdf(ref 2022-06-01)
6) "Minowa Lacquer Co.
https://urusiya.ocnk.net/product/765(reference2022-05-07)
7) "Asahiyo Chemical Co.
https://www.asahi-gelatine.co.jp/cn18/sanzenbon_j.html(reference2022-05-07)