Abubuwan da suka shafi hydrolysis na polylactic acid (pla)
November 20, 2023
A halin yanzu, samar da matsalolin duniya kimanin tan miliyan 140, bayan amfani da sharar gida da aka lissafta, wanda ya haifar da gurasar da gurasar ƙasa, haɗarin ƙasa, haɗi Girma na tsire-tsire da dabbobi, suna barazanar rayuwa game da 'yan adam da kiwon lafiya, kuma sun zama babban mahimman zunuban duniya. Kamar yadda mutane ke biya karin hankali da kuma matsalolin muhalli, sannu a hankali ana falala a hankali. A matsayinka na alipatic polyester polyester, polylactic acid (pla) shima daya daga cikin nau'ikan kayan amfani na abubuwa . Tare da kyakkyawan biochompatives, waka da kyau kwarai da kaddarorin, PL ya karɓi kulawa kuma ana daukar su zama ɗaya daga cikin sabbin hanyoyin "ECO-kayan" don maye gurbin robobi masu gudana. 1.Daukar inji na polylactic acid (pla) A matsayin kayan polyester, lalata polylactic acid ya kasu kashi biyu na hydrolytic mai sauƙi da enzyme-catalyzed lalata. Mai sauƙin lalacewa shine rashin daidaituwa game da isasshen ruwa, da fara daga cikin ramin kwayoyin, yaduwa cikin matsakaiciyar acid da alkali a cikin matsakaici, da itret Bond free hydrolyis karaya, samfurin na kwayoyin, yawan raguwa a cikin nauyin kwayar cuta lokacin da aka rage nauyin ƙwayoyin cuta. Degradation na enzymatic lalata na polylactide ne kai tsaye, polylactic acid farko hydrolysis ya faru, da kuma kara metabolism a karkashin aikin enzadation za a iya kammala.
2.factors ya shafi hydrolysis da lalata polylactic acid Abubuwan da suka shafi hydrolysis na PL za a iya raba kashi biyu: kayan abu da yanayin hydrolysis. Kayan kayan abu sun hada da tsarin kwayar halitta, lu'ulu'u mai nauyi girman kai da rarraba tsari, tsari da girma, da sauransu.; Yanayin hydrolysis sun hada da PH, zazzabi da zafi, jiyya na radiation, da sauransu, waɗannan dalilai ba su da 'yanci daga tasirin polymer na kayan kwalliya na kayan polymer. 3. Shirin Tsarin kwayoyin halitta Tsarin kwayoyin halitta shine mahimmancin mahimman abubuwan da ke shafar kaddarorin kayan aikin. Wasu masu binciken sun shirya 3-dauke da makamai, 4 dauke da makamai da sauran makamai na da makamai suna amfani da kadarorin hydrolysis daban-daban, kuma sun gano cewa yawan sarkar silsila iri ɗaya, mafi girman adadin sarƙoƙi iri ɗaya, mafi girma yawan masarauta, da sauri yawan mashin sarƙoƙi. Binciken na iya zama saboda gaskiyar cewa polymers dauke da reri-ginannun tsare-tsaren suna da ƙananan lu'ulu'u da yawa, sabili da haka karkatar da sauri fiye da waɗanda suke da tsarin layi. Mutane suna sauya tsarin kwayar cutar ta pla ta hanyar gyara copolymerization da kuma samar da nau'ikan copolymers tare da pla kamar yadda matrix don sarrafa farashin hydrolysis. Misali, PLGA cocklymer, gabatarwar Peg ba wai kawai inganta hydrophility na PLACE kawai, amma kuma yana samar da sabbin kaddarorin da ayyuka. Hydrophilicity na kungiyar da aka gabatar tana taka muhimmiyar rawa a cikin tsarin kwalliyar kwalliyar a cikin gyara na hadin kai, mafi girman lalacewar hydrolytic.
4. Tasirin Crystallity Platon mallakar kayan polyester na polyester, amma koda kuwa mallakar polyalline polyalline, lu'ulu'u ne ya isa kashi 100%, kuma an rarraba kayan cikin kayan masarufi (yankin Amorphous). A kan aiwatar da hydrolysis na pla, hydrolysis yana faruwa da farko a cikin yankin amorphot. Ruwa na farko ya shiga cikin yankin amorphot, wanda ya sa ester Bond a cikin amorphothous ya karye, lokacin da yake mafi yawan yankin zuwa tsakiyar yankin crstalline ya fara hydreryze. Ya kamata a lura cewa, a cikin tsari na pla hydrolysis, sau da yawa ana iya kasancewa saboda hydrolysis na amorpomous, da tsara da yawa tsarin ƙara ƙwayoyin cuta, yin pla da lu'ulu'u ya karu. Wasu masu bincike sun yi imani cewa karuwa a cikin lu'ulu'u a cikin hydrolysis na amorphotalin yankin, wanda ke ƙara yawan crystalline yankin a cikin sauran samfurin. 5. Tasirin tsari na Cubic Saboda opla acid na lactic acid, PLLA, wanda aka yi ta hanyar polymerization na tsarkakakken l-lactic acid; Pdla, wanda aka yi ta hanyar polymerization na tsarkakakken d-lactic; PDLA, wanda aka yi ta hanyar polymerization na ƙananan haske mai tsabta a cikin wani rabo na L-lactic acid da D-Lactic acid; da p (l / d) LA, wanda aka yi shi ta hanyar hadawa da plla da PDla a wasu rabo. Mai bincike idan aka kwatanta kayan aikin hydrolysis na Plla, PDLA, PDla, da PDla, da PDla, da PDla, da PDla, da PDla, da PDla, da PDla, da PDla, da PDLA, da PDLA, da PDLA, da PDLA, da PDLA, da PDla, da PDLA, da PDLA, da PDLA, da PDLA, da PDLA, sakamakon ya nuna cewa PDLLA ya nuna cewa PDLLA shine mafi sauƙin cutar hydrolyz; Pdla da PDLA sun kasance mafi sauƙin zuwa hydrolyze, da p (L / d) la yana da mafi ƙarfi hydrolysis juriya.
