Hydroxypropyl bylulose bylulose HPMC, oo sidoo kale loo yaqaan hydroxypromellose, waa cadaan-ka-dillaac budada unugyada cad ee chet-ka ama grauule ee leh silsilado biyo qabow iyo isbuul biyo kulul oo la mid ah by melulose. Kooxda hydroxypropyl group iyo methyl kooxda 'methyl group' iyo giraanta gulukoos gulukoos ee burukh oo la isku daro, waa nooc ka mid ah unugyada unugyada in-ka-goynta. Waa peymer sedex ah, firfircoon, poly peymer peymler caadi ah oo caadi ahaan loo isticmaalo saliidaha buluugga ah, ama u eg daawooyinka afka ah.
1. Nidaamka wax soo saarka
Kuft pull oo leh αceblose waxa ku jira 97%, dib-u-fiirinta oo dhan ee 720ml / g iyo dhererka fiber-ka ah ee 2.6mm ayaa lagu qooyay 49% NaOh xalka NOOh 40 ℃ 50 ilmood. Kadibna saxarka ayaa loo dulqaatay si looga saaro xad dhaafka 49% Xoh si loo helo unugyada alkali. Saamiga miisaanka ee (49% Xoh Aqueol) ilaa (Qeybta adag ee saxarka) ee tihdada galka ah waxay ahayd 200. Alkali cellsulose sidaas ayaa lagu meeleeyaa (20kg) oo lagu rakibay cadaadiska cadaadiska ee jaceylka leh oo kacsi gudaha ah, ka dib ayaa loo daayaa oo lagu nadiifiyaa nitrogen si ay sifiican uga saaraan oksijiinta ka soo baxa arji. Kadib, heerkulka ku yimid ka-faa'iideysiga waxaa lagu xakameeyay 60 ℃ halka ay kareyso gudaha la fuliyay.
Markaas 2.4kg DME ayaa lagu daray heerkulka ku jira falcelinta waxaa lagu xukumay 60 ℃. Ka dib marka lagu daro Dimityl Ether, methylene chloride waxaa lagu daray si loo sameeyo dawada methylement ee chloride-ka methyne-ka ee loo yaqaan 'propylene' ee loo yaqaan 'propyle thrulose' oo lagu adag yahay 'plp' oo lagu adag yahay 1.97, iyo heerkulka ku dhex jira ka-faa'iideysiga waxaa lagu xukumay 60 ℃ illaa 80 ℃. Ka dib markii lagu daro chloromethane iyo propyleneneene oxide, heerkulka ku jira falcelinta waxaa lagu xakameeyay 80 ℃ ilaa 90 ℃. Intaa waxa u dheer, fal-celinta waxay socotay 20 daqiiqo 90 ℃.
Gaaska ayaa ka dibna laga daadiyaa ka-bixiyaha iyo ceyriska ceyriska hydroxypropyl methyl bylulose waxaa laga saaraa jawaabta. Heerkulka ceyriinka hydroxypropyly melulose wuxuu ahaa 62 ℃. Cabir isku-darka 50% cabirka walxaha ah ee isugeynta tirada isugeynta ee ku saleysan cabirka tirada ceyriska hydroxypropyl bylul by by by by funding of shanta sowood-shareerka ah, mid walbana wuxuu leeyahay cabir ka duwan.
Natiijo ahaan, celcelis ahaan cabirka walxaha qaybta ee walxaha qalafsan ayaa ahaa 6.2mm. The cryroxypropyl plureulose methypy methyl (krc burada) (KRC KNAAER S1, LR = 10.2 L / DHESTMS 150RPM) Xawaaraha 10kg / Hr, iyo jajabinta ceyriinka by buttypyl bylulepyl ayaa la helay. Natiijada cabir la mid ah iyadoo la adeegsanayo 5 shaashadood oo leh cabbirro kaladuwan oo kala duwan, celcelis ahaan cabirka walxaha ayaa ahaa 1.4mm. Ku darista 80 ℃ Biyo kulul oo kululeeya ceyriinka ceyriska hydroxypropylyl byluyl by haanta leh haanta gacanta ku haysa jaakada. Caddadka saamiga miisaanka ee ceyriska ceyriska-goynta hydroxypropyl byluyl bluelose ee tirada guud ee slurry waa 0.1, oo slurry ayaa la helaa. Slantry wuxuu ku kiciyay heerkul joogto ah oo ah 80 ℃ 60 daqiiqo.
Kadib, slurry-ka waxaa lasiiyaa xawaaraha wareegga ah ee ah 0.5 rpm iyo shaandhada cadaadiska cadaadiska ee roveriga ee kuleylka (badeecada BHS shothofen). Heerkulka Grout waa 93 ℃. U adeegso bamka si aad u soo bandhigto slsutry, cadaadiska ka-bixista bamka waa 0.2mpa. Cabbirka furitaanka shaandhada cadaadiska ee Rotry waa 80μm, aagga shaandhadana waa 0.12m2. Slurry la keenay shaandhada cadaadiska ee wareegga waxaa lagu sifeeyaa shaandhada loona beddelo keega shaandhaynta. Keega shaandhada ka dhalanaysa waxaa la siiyaa 0.3mpa Steam iyo 95 ℃ biyo kulul oo leh culeys culeys ah 10.0 qeybta adag ee qaybta adag ee lagu maydhay byroxypropyl, oo markaa lagu sifeeyo shaandhada.
Biyaha kulul waxaa lagu bixiyaa bamgare cadaadis sii-karka ah ee ah 0.2mpa. Ka dib markii biyaha kulul la bixiyo, 0.3mpa Steam ayaa la keenaa. Kadib, ka dib markii wax lagu dhaqo oo lagu dhaqo ayaa laga saaraa dusha sare shaandhada oo ay ku qoran tahay xoqitaannada oo laga soo saaray mashiinka dharka dhaqa. Talaabooyinka laga soo saaro bixinta sturry si loo kala baxo alaabada la maydhay ayaa si isdaba joog ah loo fuliyaa. Sida lagu cabiray iyadoo la adeegsanayo kuleylka kuleylka - kuleylka qalajinta, waxa ku jira biyaha ee badeecada la maydhay ayaa loo sii daayay waxay ahayd 52.8%. Alaabada la maydhay ayaa laga soo saaray shaandhada cadaadiska ee wareejinta waxay qalajiyeen qashin qubka 80 ℃, waxaana lagu burburiyey Mill Guusha si ay u helaan bydroxyprose methyl melulose.
2.asoo saaris
Alaabada HPMC waxaa loo isticmaalaa sidii dhumuc weyn, kala firidhsan, xayiraada, emulsififier wuxuuna ku nasiyaa warshadaha dharka. Sidoo kale si ballaaran loogu isticmaalo resin isku-darka, patroochemical, dhoobada, waraaqda, maqaarka, dawada, cuntada, waxyaabaha la isku qurxiyo iyo warshadaha kale.
Waqtiga Post: Mar-23-2022