I-Polylactic acid yimathiriyeli enokubola kwaye yenye yezinto ezithembisayo zefayibha kwinkulungwane yama-21.Iasidi yePolylactic (PLA)ayikho kwindalo kwaye ifuna ukuhlanganiswa okwenziweyo. I-lactic acid ekrwada ivundiswa kwizityalo ezifana nengqolowa, iswekile beet, icassava, umbona, kunye nezichumisi eziphilayo. Iintsinga zePolylactic acid, ezaziwa ngokuba ziintsinga zombona, zinokufunyanwa ngokusonta.
Ukuphuhliswa kweefayili ze-polylactic acid
I-lactic acid ifumaneka kwi-yogurt. Kamva, izazinzulu zafumanisa ukuba iasidi eveliswa kukushukuma kwezihlunu kwizilwanyana nakubantu yi-lactic acid. Ukuveliswa kwe-DuPont Corporation (umyili wenayiloni) yaba yeyokuqala ukusebenzisa iipolima ze-lactic acid ukulungiselela imathiriyeli yepolymeric ye-polylactic acid kwilabhoratri.
Uphando kunye nophuhliso lwemicu ye-polylactic acid inembali engaphezu kwesiqingatha senkulungwane. I-Cyanamid, inkampani yaseMelika, iphuhlise i-polylactic acid efunxa i-sutures kwi-1960s. Kwi-1989, i-Japan's Zhong Fang kunye ne-Shimadzu Manufacturing Institute babambisene nokuphuhlisa i-polylactic acid fiber ecocekileyo (i-Lacton TM) kunye nokudibanisa kwayo kunye nemicu yendalo (i-Corn Fiber TM), eboniswe kwi-1998 ye-Nagano Winter Games; I-Unijica Corporation yaseJapan yavelisa i-polylactic acid filament kunye ne-spunbond nonwoven fabric (Terramac TM) kwi-2000. I-Cargill Dow Polymers (CDP) e-United States (ngoku eyi-NatureWorks) ikhuphe uluhlu lweemveliso (i-Ingeo TM) ezigubungela i-polylactic acid resins, i-fibers, kunye neefilimu kwi-2003 ye-Trevirange yochungechunge lwe-Trevirange eJamani kwi-2003 ilayisensi yokuvelisa i-Trevirangeoven eJamani. amalaphu asetyenziswa kwiindawo ezifana neemoto, amalaphu asekhaya, kunye nococeko.
Inkqubo kunye nokusetyenziswa kwe-polylactic acid fibers
Okwangoku, amalaphu aqhelekileyo e-PLA angalukwanga enziwe kwi-high optical purity L-polylactic acid (PLLA) njengento ekrwada, esebenzisa icrystallinity ephezulu kunye neempawu zokuqhelanisa, kwaye ilungiswe ngeenkqubo ezahlukeneyo zokusonta (i-melt spinning, i-spinning emanzi, i-spinning eyomileyo, ukujikeleza okumanzi okomileyo, ukujikeleza kwe-electrostatic, njl.). Phakathi kwazo, inyibilika i-polylactic acid fibers (iintambo ezide, iifiber ezimfutshane) zingasetyenziselwa kwiinkalo zeengubo, iingubo zasekhaya, njl njl. Izixhobo zokuvelisa kunye nenkqubo zifana ne-polyester, ene-spinnability efanelekileyo kunye nokusebenza okuphakathi. Emva kokuguqulwa okufanelekileyo, iifayili ze-polylactic acid zinokufikelela kwi-flame retardant ephezulu (ukuzicima) kunye neempawu zendalo ze-antibacterial. Nangona kunjalo, i-melt spun PLA fiber isenayo indawo yokuphucula amandla oomatshini, uzinzo oluphezulu lobushushu obuphezulu, ukomelela kunye nokumelana nokwaluphala.
Ukusonta okumanzi, ukusonta okomileyo, ukusonta okumanzi okomileyo, kunye ne-electrospinning ye-polylactic acid fibers (imembranes) zisetyenziswa ikakhulu kwinkalo yebiomedical. Iimveliso ezimeleyo ziquka i-sutures efunxayo enamandla kakhulu, abathwali beziyobisi, i-anti-adhesion membranes, isikhumba sokwenziwa, i-scaffolds yobunjineli beethishu, njl.
Ngokunyuka kwemfuno yamalaphu angalukwanga alahlwayo kunyango, ucoceko, ukuhluzwa, ukuhombisa kunye namanye amabala, amalaphu e-polylactic acid angalukwanga nawo abe yenye yeendawo zophando kunye nophuhliso.
Ngeminyaka yoo-1990, iYunivesithi yaseTennessee eUnited States yaqala yafunda i-polylactic acid spunbond yaza yanyibilika amalaphu angaphothiweyo. I-Zhongfang yase-Japan kamva yavelisa amalaphu e-polylactic acid e-spunbond e-spunbond angalukwanga kwizicelo zezolimo, ngelixa inkampani yaseFransi ye-Fibreweb iphuhlise i-polylactic acid spunbond, amalaphu anyibilikayo avuthelweyo, kunye nolwakhiwo oluhlanganisiweyo lwe-multi-layer (Deposita TM). Phakathi kwazo, umaleko welaphu we-spunbond nonwoven ubonelela ikakhulu ngenkxaso yomatshini, ngelixa umaleko welaphu elinyibilikayo elivuthelweyo kunye ne-spunbond nonwoven layer layer ngokudibeneyo ibonelela ngomqobo, i-adsorption, filtration, kunye neziphumo zokugquma.
IYunivesithi yaseTongji yasekhaya, iShanghai Tongjieliang Biomaterials Co., Ltd., iHengtian Changjiang Biomaterials Co., Ltd. kunye nezinye iiyunithi ziphuhlise ngempumelelo amalaphu angaphothiweyo afana ne-viscose ephothiweyo, ephothiweyo, eqengqelekayo eshushu, umoya oshushu, njl. i-napkins ye-sanitary kunye ne-diapers, kunye ne-mask yobuso, iibhegi zeeti, izinto zokucoca umoya kunye namanzi kunye nezinye iimveliso.
Ifayibha ye-Polylactic acid ikhuthazwe ngokubanzi kwaye isetyenziswa ngaphakathi kweemoto, iinyanda zecuba, kunye nezinye iindawo ngenxa yomthombo wayo wendalo, ukonakaliswa kwezinto eziphilayo, kunye nobuhlobo bendalo.
Iimpawu ze-polylactic acid fibers
Enye yeenzuzo ezidumileyo zemicu ye-polylactic acid kukukwazi kwabo ukwenza i-biodegrade okanye ukufunxa emzimbeni. Phantsi kweemeko zomgquba ezisemgangathweni, ukubola kwezinto eziphilayo kufuneka kulinganiswe, kwaye iimveliso zokuthotywa kwamanzi kunye nekharbon diokside. Imicu yeasidi yepolylactic eqhelekileyo i-hydrolyze kancinane okanye kunzima ukuyibhaqa xa isetyenziswa ngokwesiqhelo okanye kwiindawo ezininzi zendalo. Ngokomzekelo, ukuba ungcwatywe kumhlaba wendalo unyaka, ngokusisiseko awuthobi, kodwa phantsi kweemeko eziqhelekileyo zokushisa umgquba, uyancipha malunga neveki.
Ukuthotywa kunye nokufakwa kwe-polylactic acid fibers kwi-vivo kuchatshazelwa kakhulu yi-crystallinity yabo. Ukulinganisa kwi-vitro degradation experiments kubonise ukuba i-crystallinity polylactic acid fibers ephezulu igcina imilo yazo kwaye iphantse i-80% yamandla emva kweminyaka eyi-5.3, kwaye inokuthatha iminyaka engama-40-50 ukuthotywa ngokupheleleyo.
Ukuveliswa kwezinto ezintsha kunye nokwandiswa kweefayili ze-polylactic acid
Njengodidi lwefayibha yemichiza esele iphuhlisiwe kwaye yaveliswa ngaphezulu kwesiqingatha senkulungwane, eyona ndlela yokusetyenziswa kwefiber ye-polylactic acid isengaphantsi kwewaka le-polyester fiber. Nangona ixabiso lexabiso liqala kuqala, ukusebenza kwayo akunakungahoywa. Ukuguqulwa yindlela yokuphuhlisa i-polylactic acid fibers.
I-China ingumvelisi omkhulu kunye nomthengi wee-fibers zekhemikhali, kwaye kwiminyaka yamuva nje, uphando kwi-modified polylactic acid fibers inikwe phambili. Iintsinga ze-Polylactic acid zinokudityaniswa kunye nendalo yendalo "ikotoni, ilinen, kunye noboya" ukwenza umatshini olukiweyo kunye nelaphu elinithiweyo kunye nokusebenza okuhambelanayo, kunye neminye imicu yekhemikhali efana ne-spandex kunye ne-PTT ukwenza amalaphu, ebonisa i-skin friendly, ephefumulayo, kunye nemiphumo ephazamisayo yomswakama. Baye bakhuthazwa kwintsimi yeendwangu zangaphantsi.
Dongguan Liansheng Nonwoven Fabric Co., Ltd., umenzi weempahla ezingalukiweyo kunye neendwangu ezingabonakaliyo, ufanelekile ukuthembela kwakho!
Ixesha lokuposa: Jun-11-2024