成果報告書詳細
管理番号20120000000740
タイトル*平成23年度中間年報 グリーン・サステイナブルケミカルプロセス基盤技術開発/化学品原料の転換・多様化を可能とする革新グリーン技術の開発/非可食原料からのバイオポリエステル製造基盤技術の研究開発と実用材料化
公開日2012/7/11
報告書年度2011 - 2011
委託先名国立大学法人東京大学 株式会社カネカ 国立大学法人大阪大学 バイオベース株式会社 関西化学機械製作株式会社 Bioーenergy株式会社
プロジェクト番号P09010
部署名電子・材料・ナノテクノロジー部
和文要約和文要約等以下本編抜粋:
1. 研究開発の内容及び成果等
本プロジェクトは、再生産可能資源(バイオマス)である糖や植物油から、微生物の優れた物質変換機能を利用して新規なバイオベースポリマーを省エネルギーかつ二酸化炭素削減プロセスで生合成するとともに、ポリマーに応じた新規成形加工技術を開発し、実用材料化に向けた応用開発研究を産学連携のもと遂行している。
具体的には、植物油を精製する際に排出される副産物や木質バイオマスから大量かつ安価に製造されるパルプなどの食糧と競合しない非可食系バイオマスを出発原料とし、2種類の有用なバイオポリエステル(微生物産生ポリエステルと分岐状ポリエステル)を製造するための基盤技術の確立と大量生産に向けた研究開発を行うことを目的としている。さらに、生産されたバイオポリエステルを中心とし、(1)結晶核剤および相溶化剤とのコンパウンド生産技術の開発、(2)気泡緩衝材などのフィルム包装資材の開発、(3)接着剤のためのエマルジョンの開発、(4)難燃、抗菌、防虫機能を有する高性能不織布あるいは高強度繊維を用いた繊維強化複合材料の開発、(5)耐衝撃性・難燃性に優れた家電用外装材、OA機器用外装材、自動車内装部材、ウレタン発泡体などの大型成形品の開発、に関する研究を委託先4企業、2大学に加え、再委託先3企業、1大学の共同研究のもと遂行している。
英文要約Summary

The aim of this project is the efficient production of microbial polyesters and branched biopolyesters from non-edible renewable resources as by-products derived from plant oil or wood pulp and the development of new processing techniques for the production of applications. Main results in this financial year are followings;
Molecular-weight of poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate] (P(3HB-co-3HH) or PHBH), is reduced when non-edible by-products derived from palm oil mill are utilized as carbon sources instead of palm oil or palm-kernel oil. We searched the pre-treatment condition of non-edible by-products and found out that the responsible substances for the reduction of molecular-weight were removed by using bleaching earth. We succeeded to biosynthesize P(3HB-co-11mol%-3HH) with molecular-weight more than 1 million.
On the other hand, we have investigated the synthesis of a branched biopolymer from grass plant biomass and its applications. In the synthesis of the branched biopolymer with the core of castor oil and the branch of poly(lactic acid), the production of lactic acid by fermentation from grass plant biomass, the precise synthesis and quantity synthesis of the branched biopolymer from lactic acid were examined. In the production of lactic acid by fermentation using pulp as starting material, more than 90% yield of the lactic acid production was achieved, which led to the one-quarter cost of the fermentation. For the quantity production of the branched biopolymer, we had a set of goals of two molecular weights and the trial production was carried out by using a 30L reactor.
Practical methods to enhance the productivity of PHBH-based blown film were investigated. The specific composition consisted of PHBH, well-crystallized-PBS, ductile PBAT and some specific additives has achieved the initial target level of releasability. Folded 2-ply blown film can be peeled from each other speedily within 35 sec after molding with the niproll with moderate temperature set around 30 degree C. Furthermore, we succeeded to produce air-bubble-type wraps from PHBH which are usually produced from polyethylene. Nonwovens and high functional fiber was processed from PHBH and the filament can be used for knitting processing.
For the application of the branched biopolymers, impact-resistant bio-based resins were developed. The combination of branched polymers and poly(lactic acid) provided the impact strength of 8 kJ/m2, which is comparable to that of polypropylene. For the flame-retardant treatment of the bio-based resin, when added a phosphorus flame retardant and a drip inhibitor, the flame resistance improved to UL94-V0, which is much superior to the target value (UL94-V2). The molding in the 200, 400, and 800 ton-level clamp capacity was examined for the optimization for the quantity production of the molded products of bio-based resin.
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