Qaybaha Asiidhka Daahsoon ee Biyo-ku-salaysan ee Biyodegradable

Isku-dubaridka habka iyo habka Polylactic acid
1. Wax soo saarka Polylactic acid wuxuu ku salaysan yahay lactic acid sida alaabta ceeriin, halsano lactic acid dhaqameed inta badan leh alaabta ceeriin istaarijka, wakhtigan xaadirka ah, Maraykanka, France, Japan iyo dalal kale ayaa horumariyay isticmaalka beeraha by-products sida alaabta ceeriin ee wax soo saarka halsano ee lactic acid, ka dibna wax soo saarka ee polylactic acid.
Habka buufiska tooska ah
Habka uudhisku waa monomer-ka lactic acid ee si toos ah uumi-saarid, sidoo kale loo yaqaan habka hal-tallaabo polymerization. Joogitaanka wakiilka fuuq-baxa, kooxaha hydroxyl iyo karboksyl ee ku jira molecule acid lactic waxaa fuuqbaxay kulaylka, iyo oligomers waxaa lagu farsameeyaa uumi toos ah. Ku dar kicinta, sii wad inaad kor u qaaddo heerkulka, cufnaanta molecular qaraabo hoose ee polylactic acid polymerization galay miisaan sare oo qaraabo ah oo ah polylactic acid.
Habka laba-tallaabo
Samee aashitada lactic si aad u soo saarto giraanta dimer propylene glycol ester, ka bacdina furitaanka polycondensation-ka galay polylactic acid. Tiknoolajiyadani waa qaan-gaar badan, habka ugu muhiimsan waa alaabta ceeriin ee halsano microbial si ay u soo saarto lactic acid, ka dibna ka dib nadiifinta, oligomerization fuuqbaxa, dildilaaca heerkulka sare, iyo ugu dambeyntii polymerization galay polylactic acid.
Diyaarinta miisaanka unugyadu sareeyo ee PLA by falcelinta falcelinta
Isku darka kicinta kicinta ee joogtada ah iyo extruder mataanaha ah ayaa loo isticmaalaa si loo sameeyo tijaabooyin dhalaalid joogto ah si loo helo PLA oo leh miisaan kelli ah ilaa 150,000 oo laga sameeyay lactic acid iyadoo si joogto ah loo dhalaalinayo polycondensation. Cufnaanta molar-ka sare ee PLA waxaa lagu diyaariyay kondensation dheeraad ah oo ah xuubka cufka cufka lactic acid prepolymer ee duleeliyaha iyadoo la adeegsanayo faaruqaha mataanaha ah. Tirada molarka ee PLA si dhakhso leh oo wax ku ool ah ayaa loo kordhin karaa iyada oo la adeegsanayo falcelinta mataanaha ah ee polycondensation ee heerkulka falcelinta 150 °C, qiyaasta kicinta ee 0.5%, iyo xawaaraha furaha ee 75 r/min, iyo iskudarka kala firdhisanaanta badeecada falcelinta-baxday ayaa hoos u dhacday isku-noolaanshahana wuu fiicnaaday. Isbarbardhigga qalloocyada DSC waxay muujisay in crystallinity ee PLA ee lagu helay falcelinta polycondensation extrusion la yareeyay, taas oo faa'iido u leh in la hagaajiyo jajabnaanta alaabta PLA ee habka isticmaalka.
2.Habraaca
(1) Soo saarista walxaha
Dalagyada qolofleyda ah sida galleyda waa la jajabiyaa waxaana laga soo saaraa istaarijka, ka dibna istaarijka ayaa laga dhigayaa gulukoos aan la sifeynin. Tiknoolajiyada sare ee badan ayaa ka adkaaday geeddi-socodkii laga jarayay shiididda iyo soo saarista alaabta ceeriin ee si toos ah tiro badan oo dalagga ah.
(2) Halsano
Gulukoosku waxa loo khamiiriyaa si la mid ah soo saarista biirka ama khamriga, gulukoosta waxa lagu khamiiriyaa lactic acid oo la mid ah ta lagu daray cuntada si loogu isticmaalo unugyada muruqa aadanaha.
(3) Alaabta dhexdhexaadka ah
Lactic acid monomer waxa loo beddelaa badeeco dhexdhexaad ah, lactic acid leh biyo la dhimay, ama propyl lactate, iyada oo loo marayo hab-fiirsi gaar ah.
(4) Polymerization
Ka dib marka monomer-ka propylene glycol ester lagu nadiifiyo faakuum, habka kala dirida bilaa dareere ah ayaa loo isticmaalaa si loo dhamaystiro ficilka furitaanka giraanta, si monomerku noqdo polymerized.
(5) Wax ka beddelka polymer-ka
Sababtoo ah miisaanka molecular ee kala duwan iyo crystallinity ee polymers, waxaa jira meelo badan oo loogu talagalay isbeddelka guryaha, sidaas darteed PLA waxaa loo beddelaa siyaabo kala duwan codsiyada kala duwan.

Macluumaadka shirkadda

Waxyaalaha ay shirkadu soo dejiso iyo wax-soo-saarka dhoofinta ugu badan waxaa ka mid ah

(1) Polymers: Faa'iidada polymers-ku waa in ay si fudud u samaysan karaan qaabka la rabo iyada oo la adeegsanayo farsamooyin kala duwan sida xalinta daadinta, dhalaalidda, ama mashiinnada. Natiijo ahaan, maqaar-galaha polymer-ku-saleysan ayaa ah mid aad u jaban in la soo saaro. Polymers waxay sidoo kale ka falcelin karaan si unugyo kiimiko ah oo kala duwan ay ugu dhejiyaan dusha sare ee maqaar-galaha, taas oo ka dhigaysa mid la jaan qaada agagaarka jirka.

(2)Catalysts and Auxiliaries: Kataliye waa walax bedesha heerka falcelinta fal-celinta kiimikaad halka ay ka kooban tahay iyo tayadeedu aanay isbedelin falcelinta ka dib. Kataliyatada soo dedejisa falcelinta waxaa loo yaqaannaa kicinta togan (Positive Cata-lyst), midda hoos u dhigtana waxaa loo yaqaannaa kicinta taban (Negative Catalyst) ama dib u dhac. Guud ahaan marka la hadlo, kiciyaasha ayaa ah kicinta togan.

Wakiilka kaaliyaha waxaa loola jeedaa wax soo saarka warshadaha iyo beeraha, gaar ahaan wax soo saarka kiimikada, si loo hagaajiyo habka wax soo saarka, horumarinta tayada alaabta iyo wax soo saarka, ama si ay u siiyaan alaabta qaar ka mid ah waxqabadka codsiga gaar ah, sida caadiga ah u baahan tahay in lagu daro qaar ka mid ah kiimikooyinka caawiye ah. Waa qayb weyn oo ka mid ah alaabta ceeriin ee muhiimka ah ee wax soo saarka kiimikada, waxay siin kartaa alaabta leh sifooyin gaar ah, hagaajinta isticmaalka alaabta la dhammeeyey; waxay dardargelin kartaa xawaaraha falcelinta kiimikada, hagaajinta wax-soo-saarka badeecada; badbaadin kara alaabta ceeriin, hagaajinta waxtarka processing, si ballaaran loo isticmaalo warshadaha kiimikada.