Polylactic acid yog cov khoom siv biodegradable thiab ib qho ntawm cov khoom siv fiber ntau zoo nyob rau xyoo pua 21st.Polylactic acid (PLA)tsis muaj nyob hauv cov xwm txheej thiab yuav tsum muaj kev sib xyaw ua ke. Cov khoom siv raw lactic acid yog fermented los ntawm cov qoob loo xws li nplej, qab zib beet, cassava, pob kws, thiab organic chiv. Polylactic acid fibers, tseem hu ua pob kws fibers, tuaj yeem tau los ntawm spinning.
Kev loj hlob ntawm polylactic acid fibers
Lactic acid muaj nyob rau hauv yogurt. Tom qab ntawd, cov kws tshawb fawb pom tau tias cov kua qaub uas tsim los ntawm cov leeg nqaij hauv cov tsiaj thiab tib neeg yog lactic acid. Lub invention ntawm DuPont Corporation (tus inventor ntawm nylon) yog thawj zaug siv lactic acid polymers los npaj polylactic acid polymer cov ntaub ntawv nyob rau hauv lub laboratory.
Kev tshawb fawb thiab kev loj hlob ntawm polylactic acid fibers muaj keeb kwm ntau tshaj li ib nrab xyoo pua. Cyanamid, ib lub tuam txhab Asmeskas, tsim polylactic acid absorbable sutures hauv xyoo 1960. Xyoo 1989, Nyiv Zhong Fang thiab Shimadzu Manufacturing Institute tau koom tes los tsim cov ntshiab spun polylactic acid fiber (LactonTM) thiab nws cov khoom sib xyaw nrog ntuj fibers (corn FiberTM), uas tau nthuav tawm ntawm 1998 Nagano Winter Games; Unijica Corporation ntawm Nyiv tau tsim polylactic acid filament thiab spunbond nonwoven npuag (TerramacTM) nyob rau hauv 2000. Cargill Dow Polymers (CDP) nyob rau hauv lub tebchaws United States (tam sim no NatureWorks) tso tawm ib tug series ntawm cov khoom (IngeoTM) npog polylactic acid resins, fibers, thiab films nyob rau hauv 2003, thiab muaj ntawv tso cai rau cov ntaub ntawv nyob rau hauv lub teb chaws Yelemees 2003. siv hauv teb xws li tsheb, tsev textiles, thiab tu cev.
Cov txheej txheem thiab kev siv ntawm polylactic acid fibers
Tam sim no, lub ntsiab PLA non-woven fabrics yog tsim los ntawm high optical purity L-polylactic acid (PLLA) raws li raw khoom, siv nws cov crystallinity siab thiab orientation yam ntxwv, thiab npaj los ntawm txawv spinning txheej txheem (melt spinning, ntub spinning, qhuav spinning, qhuav ntub spinning, electrostatic spinning, thiab lwm yam). Ntawm lawv, yaj spun polylactic acid fibers (ntev fibers, luv fibers) yuav siv tau nyob rau hauv lub teb ntawm cov khaub ncaws, tsev textiles, thiab lwm yam. Cov khoom siv thiab cov txheej txheem yog zoo li polyester, nrog zoo spinnability thiab nruab nrab kev ua tau zoo. Tom qab kev hloov kho tsim nyog, polylactic acid fibers tuaj yeem ua tiav cov nplaim hluav taws zoo (tus kheej tua) thiab cov khoom siv tshuaj tua kab mob ntuj. Txawm li cas los xij, yaj spun PLA fiber ntau tseem muaj chaw rau kev txhim kho lub zog txhua yam, qhov kub thiab txias qhov ruaj khov, kev ua haujlwm siab thiab kev laus ua haujlwm.
Kev ntub dej, ziab ziab, qhuav ntub dej, thiab electrospinning ntawm polylactic acid fibers (membranes) yog siv rau hauv biomedical teb. Cov khoom sawv cev muaj xws li lub zog siab absorbable sutures, tshuaj nqa khoom, tiv thaiv adhesion daim nyias nyias, daim tawv nqaij, cov ntaub so ntswg engineering scaffolds, thiab lwm yam.
Nrog rau qhov kev thov ntau ntxiv rau cov ntaub ntawv pov tseg tsis-woven hauv kev kho mob, huv, pom, kho kom zoo nkauj thiab lwm yam, polylactic acid non-woven fabrics kuj tau dhau los ua ib qho ntawm kev tshawb fawb thiab kev loj hlob hotspots.
Nyob rau xyoo 1990, University of Tennessee hauv Tebchaws Meskas thawj zaug tau kawm txog polylactic acid spunbond thiab yaj cov ntaub tsis muaj ntaub. Nyiv lub Zhongfang tom qab tsim polylactic acid spunbond nonwoven fabrics rau kev ua liaj ua teb daim ntaub ntawv, thaum Fabkis lub tuam txhab Fibreweb tsim polylactic acid spunbond, yaj cua tshuab nonwoven fabrics, thiab ntau txheej txheej (DepositaTM). Ntawm lawv, spunbond nonwoven npuag txheej tsuas yog muab kev txhawb nqa txhua yam, thaum lub tshuab ziab khaub ncaws tsis yog ntaub txheej thiab spunbond nonwoven npuag txheej ua ke muab kev cuam tshuam, adsorption, pom, thiab rwb thaiv tsev.
Domestic Tongji University, Shanghai Tongjieliang Biomaterials Co., Ltd., Hengtian Changjiang Biomaterials Co., Ltd. thiab lwm yam units tau ntse tsim nonwoven fabrics xws li spun viscose, spunlaced, kub dov, kub kub, thiab lwm yam nyob rau hauv kev loj hlob ntawm puas fibers rau nonwovens thiab nonwoven cov khoom uas yog siv rau cov khoom siv sansitposable. thiab cov ntaub so ntswg, nrog rau lub ntsej muag lub ntsej muag, lub hnab tshuaj yej, cov khoom siv lim cua thiab dej thiab lwm yam khoom.
Polylactic acid fiber ntau tau nthuav dav thiab siv rau hauv tsheb sab hauv, cov khoom siv luam yeeb, thiab lwm qhov chaw vim nws qhov chaw, biodegradability, thiab ib puag ncig tus phooj ywg.
Cov yam ntxwv ntawm polylactic acid fibers
Ib qho ntawm cov txiaj ntsig zoo ntawm polylactic acid fibers yog lawv lub peev xwm los biodegrade lossis nqus hauv lub cev. Nyob rau hauv cov txheej txheem composting, biodegradability yuav tsum tau ntsuas, thiab cov khoom degradation yog dej thiab carbon dioxide. Cov pa polylactic acid fibers hydrolyze maj mam lossis txawm tias nyuaj los kuaj pom hauv kev siv ib txwm siv lossis feem ntau ib puag ncig ntuj. Piv txwv li, yog tias faus rau hauv cov av ntuj rau ib xyoos, nws yeej tsis degrade, tab sis nyob rau hauv ib txwm kub composting tej yam kev mob, nws degrades rau txog ib lub lim tiam.
Lub degradation thiab nqus ntawm polylactic acid fibers hauv vivo cuam tshuam zoo heev los ntawm lawv cov crystallinity. Kev simulation hauv vitro degradation thwmsim tau pom tias muaj crystallinity polylactic acid fibers tseem tuav lawv cov duab thiab ze li ntawm 80% lub zog tom qab 5.3 xyoo, thiab yuav siv sij hawm 40-50 xyoo kom tag nrho degrade.
Innovation thiab expansion ntawm polylactic acid fibers
Raws li cov tshuaj fiber ntau uas tau tsim thiab tsim tawm rau ntau tshaj ib nrab xyoo pua, qhov kev siv ntawm polylactic acid fiber ntau tseem tsawg dua li ib txhiab ntawm polyester fiber. Txawm hais tias tus nqi tseem ceeb yog thawj, nws qhov kev ua tau zoo tsis tuaj yeem tsis quav ntsej. Kev hloov kho yog ib txoj hauv kev los tsim cov polylactic acid fibers.
Tuam Tshoj yog tus tsim khoom loj thiab cov neeg siv khoom siv tshuaj fiber ntau, thiab nyob rau xyoo tas los no, kev tshawb fawb txog kev hloov pauv polylactic acid fibers tau muab qhov tseem ceeb. Polylactic acid fibers tuaj yeem sib xyaw nrog cov khoom siv niaj hnub "paj rwb, linen, thiab ntaub plaub" los ua tshuab woven thiab knitted fabrics nrog kev ua tau zoo, nrog rau lwm cov tshuaj fibers xws li spandex thiab PTT ua cov ntaub, xav txog cov tawv nqaij zoo nkauj, breathable, thiab noo noo wicking cuam tshuam. Lawv tau txais kev txhawb nqa hauv thaj tsam ntawm cov ris tsho hauv qab fabrics.
Dongguan Liansheng Nonwoven Fabric Co., Ltd., cov chaw tsim khoom ntawm cov ntaub ntawv tsis-woven thiab non-woven fabrics, tsim nyog ntawm koj txoj kev ntseeg siab!
Post lub sij hawm: Jun-11-2024