JP4766266B2 - 共重合型易分解性ポリ乳酸とポリ乳酸の分解方法 - Google Patents
共重合型易分解性ポリ乳酸とポリ乳酸の分解方法 Download PDFInfo
- Publication number
- JP4766266B2 JP4766266B2 JP2007001576A JP2007001576A JP4766266B2 JP 4766266 B2 JP4766266 B2 JP 4766266B2 JP 2007001576 A JP2007001576 A JP 2007001576A JP 2007001576 A JP2007001576 A JP 2007001576A JP 4766266 B2 JP4766266 B2 JP 4766266B2
- Authority
- JP
- Japan
- Prior art keywords
- polylactic acid
- copolymer
- decomposing
- glycolide
- poly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/105—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with enzymes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Description
Eur. J. Biochem., 47, 91 (1974) Appl. Environ. Microbiol. 63, 4, 1637(1997) Macromolecules, 27, 825 (1994) Macromol. Biosci., 1, 25(2001)
本発明の共重合体は、D−ラクチドとグリコリドとを化学触媒の存在下に開環重合させることによって合成される。該共重合体において、化学式(1)で表される構造単位はD−ラクチド由来の構造単位であり、化学式(2)で表される構造単位はグリコリド由来の構造単位である。
本発明の共重合体は、D−ラクチド及びグリコリドを目的とする共重合体に応じた割合で混合し、該混合物を化学触媒の存在下、必要に応じて加熱するなどして重合反応を行うことにより合成できる。好ましくは撹拌しながら反応を進めるのがよい。
本発明の共重合体は、プロテアーゼやリパーゼ等の加水分解酵素により分解することができる。プロテアーゼとしては、特にパパイン、α−キモトリプシン、プロテイネースKが好ましい。
D−ラクチド6gとD−グリコリド4gに触媒としてオクチル酸すず(II)100mgを加え、130℃で2時間撹拌した。反応後、粗生成物を20mLのクロロホルムに溶解し、100mLのメタノールに沈殿させ、3gの白色生成物を得た。
実施例1で得たD−ラクチドとグリコリドとの共重合体10mgを酵素溶液1mL、0.5%オクチルグルコシド溶液0.1mL、pH 7の0.1Mリン酸緩衝液4mLからなる反応液に加え、37℃で撹拌しながら反応させた。12時間後、酵素反応により生成した水溶性の有機炭素を全有機炭素分析装置(島津社製TOC5000A)で測定した。
島津社製ポリ−L−乳酸(ラクティー#1012、数平均分子量Mn=2.1×105)10mgを酵素溶液1mL、0.5%オクチルグルコシド溶液0.1mL、pH 7の0.1Mリン酸緩衝液4mLからなる反応液に加え、37℃で撹拌しながら反応させた。12時間後、酵素反応により生成した水溶性の有機炭素を全有機炭素分析装置で測定した。表3には、各種リパーゼ、プロテアーゼによるポリ−L−乳酸の分解性を示した。α−キモトリプシンを使用するとプロテイネースKには及ばないもののポリ−L−乳酸に対して明らかな生分解性を示した。なお、酵素標品は実施例2と同じものを用いた。また、キャンディダシリンドラセア由来のリパーゼはバイオキャタリスト社製、シュードモナスセパシア由来のリパーゼはアマノ社製、トリプシンはシグマ社製の酵素標品をそれぞれ使用した。
Claims (1)
- オクチルグルコシド存在下でポリ−L−乳酸をキモトリプシンで分解する方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007001576A JP4766266B2 (ja) | 2007-01-09 | 2007-01-09 | 共重合型易分解性ポリ乳酸とポリ乳酸の分解方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007001576A JP4766266B2 (ja) | 2007-01-09 | 2007-01-09 | 共重合型易分解性ポリ乳酸とポリ乳酸の分解方法 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002057906A Division JP4065990B2 (ja) | 2002-03-04 | 2002-03-04 | 共重合型易分解性ポリ乳酸とポリ乳酸の分解方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007177247A JP2007177247A (ja) | 2007-07-12 |
JP4766266B2 true JP4766266B2 (ja) | 2011-09-07 |
Family
ID=38302720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007001576A Expired - Lifetime JP4766266B2 (ja) | 2007-01-09 | 2007-01-09 | 共重合型易分解性ポリ乳酸とポリ乳酸の分解方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4766266B2 (ja) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0667886B2 (ja) * | 1990-08-21 | 1994-08-31 | エム・ディ・リサーチ株式会社 | 高分子化合物 |
JP3077704B2 (ja) * | 1990-10-30 | 2000-08-14 | 株式会社島津製作所 | 生分解性プラスチック成形体 |
DE19619236A1 (de) * | 1996-05-13 | 1997-11-20 | Bayer Ag | Abbau von biologisch abbaubaren Polyesteramiden mit Enzymen |
JP3692455B2 (ja) * | 1998-08-21 | 2005-09-07 | 独立行政法人理化学研究所 | ポリ乳酸樹脂分解能を有する新規微生物およびポリ乳酸樹脂の分解処理方法 |
JP3866468B2 (ja) * | 1999-12-24 | 2007-01-10 | 大日精化工業株式会社 | ポリ乳酸の分解方法 |
JP3326495B2 (ja) * | 2000-05-29 | 2002-09-24 | 独立行政法人産業技術総合研究所 | ポリ乳酸樹脂の分解方法 |
-
2007
- 2007-01-09 JP JP2007001576A patent/JP4766266B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2007177247A (ja) | 2007-07-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Nair et al. | Biodegradation of biopolymers | |
Sander | Biodegradation of polymeric mulch films in agricultural soils: concepts, knowledge gaps, and future research directions | |
Sharma et al. | Polyhydroxyalkanoate (PHA): properties and modifications | |
Muhammadi et al. | Bacterial polyhydroxyalkanoates-eco-friendly next generation plastic: production, biocompatibility, biodegradation, physical properties and applications | |
Karamanlioglu et al. | Abiotic and biotic environmental degradation of the bioplastic polymer poly (lactic acid): A review | |
Qi et al. | New advances in the biodegradation of Poly (lactic) acid | |
Hiroto et al. | Breakdown of plastics and polymers by microorganisms | |
Tokiwa et al. | Biodegradability of plastics | |
Tokiwa et al. | Biodegradability and biodegradation of polyesters | |
Iram et al. | Usage of potential micro-organisms for degradation of plastics | |
Chiellini et al. | Biodegradation of poly (vinyl alcohol) based materials | |
Södergård et al. | Properties of lactic acid based polymers and their correlation with composition | |
Nampoothiri et al. | An overview of the recent developments in polylactide (PLA) research | |
Tokiwa et al. | Biodegradability and biodegradation of poly (lactide) | |
Tokiwa et al. | Review degradation of microbial polyesters | |
Sharma et al. | A handbook of applied biopolymer technology: synthesis, degradation and applications | |
Samantaray et al. | Design and control of compostability in synthetic biopolyesters | |
Sankhla et al. | Fungal degradation of bioplastics: An overview | |
JP4359718B2 (ja) | ポリ乳酸の酵素解重合法、及び解重合生成物を用いるポリ乳酸の製造方法 | |
US6191176B1 (en) | Degradable polyesters, a mixed culture of microorganisms for degrading these polyesters, and methods for making these substances | |
Kawai | Polylactic acid (PLA)-degrading microorganisms and PLA depolymerases | |
Youngpreda et al. | Optimization of poly (DL-lactic acid) degradation and evaluation of biological re-polymerization | |
CN1308395C (zh) | 生物降解性聚酯水性分散液及其制造方法 | |
Syahirah et al. | Preparation, characterization and biodegradation of blend films of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) with natural biopolymers | |
JP2002320499A (ja) | ポリアルキレンアルカノエートまたはポリ(3−ヒドロキシアルカノエート)の環状体を主成分とするオリゴマーへの解重合方法、および前記環状オリゴマーの重合方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070327 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070518 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20070518 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20080911 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080917 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20081117 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100127 |
|
A601 | Written request for extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A601 Effective date: 20100326 |
|
A602 | Written permission of extension of time |
Free format text: JAPANESE INTERMEDIATE CODE: A602 Effective date: 20100402 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110510 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110531 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 4766266 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140624 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term |