Amfani da Hydroxypropyl Methyl Cellulose na Cikin Gida wajen Samar da Babban Polymerization Degree na Polyvinyl Chloride

Takaitaccen Bayani: Amfani da kayan aikin gidahydroxypropyl methylcelluloseAn gabatar da wani abu da aka shigo da shi daga waje don samar da PVC mai babban matakin polymerization. An binciki tasirin nau'ikan hydroxypropyl methylcellulose guda biyu akan kaddarorin PVC masu babban matakin polymerization. Sakamakon ya nuna cewa yana yiwuwa a maye gurbin hydroxypropyl methyl cellulose na cikin gida maimakon wanda aka shigo da shi daga waje.

Resin PVC mai girman-mataki-na-polymerization yana nufin resin PVC mai matsakaicin matakin polymerization na sama da 1,700 ko kuma tare da ɗan haɗin gwiwa tsakanin ƙwayoyin halitta, daga cikinsu mafi yawan su ne resin PVC mai matsakaicin matakin polymerization na 2,500 [1]. Idan aka kwatanta da resin PVC na yau da kullun, resin PVC mai yawan polymerization yana da juriya mai ƙarfi, ƙaramin saitin matsi, juriya mai kyau ga zafi, juriyar tsufa, juriya ga gajiya da juriyar lalacewa. Madadin roba ne mai kyau kuma ana iya amfani da shi a cikin bututun rufe motoci, wayoyi da kebul, catheters na likitanci, da sauransu [2].

Hanyar samar da PVC mai yawan polymerization ita ce polymerization na dakatarwa [3-4]. A cikin samar da hanyar dakatarwa, mai wargazawa muhimmin wakili ne na taimako, kuma nau'insa da adadinsa za su shafi siffar barbashi kai tsaye, rarraba girman barbashi, da kuma shan plasticizer na resin PVC da aka gama. Tsarin wargazawa da aka fi amfani da su sune tsarin barasa na polyvinyl da tsarin wargazawar hydroxypropyl methylcellulose da polyvinyl alcohol composite, kuma masana'antun cikin gida galibi suna amfani da na ƙarshe [5].

1 Babban kayan aiki da ƙayyadaddun bayanai

An nuna manyan kayan aiki da ƙayyadaddun bayanai da aka yi amfani da su a gwajin a cikin Jadawali na 1. Ana iya gani daga Jadawali na 1 cewa hydroxypropyl methylcellulose na cikin gida da aka zaɓa a cikin wannan takarda ya yi daidai da hydroxypropyl methylcellulose da aka shigo da shi, wanda ke ba da sharadin gwajin maye gurbin a cikin wannan takarda.

2 Abubuwan gwaji

2. 1 Shirya maganin hydroxypropyl methylcellulose

A ɗauki wani adadin ruwan da aka narkar da shi, a saka shi a cikin akwati a dumama shi zuwa digiri 70 na Celsius, sannan a hankali a zuba hydroxypropyl methylcellulose a hankali a hankali ana juyawa akai-akai. Cellulose ɗin yana shawagi a kan ruwan da farko, sannan a hankali a bar shi ya haɗu har sai ya yi daidai. A sanyaya ruwan har sai ya yi kauri.

Tebur 1 Babban kayan aiki da ƙayyadaddun bayanai

2. 2 Hanyar gwaji

A kan ƙaramin na'urar gwaji mai ƙarfin L 10, yi amfani da hydroxypropyl methyl cellulose da aka shigo da shi don gudanar da gwaje-gwajen ma'auni don tantance dabarar ƙaramin gwajin; yi amfani da hydroxypropyl methyl cellulose na cikin gida don maye gurbin hydroxypropyl methyl cellulose da aka shigo da shi don gwaji; An kwatanta samfuran resin PVC da aka samar ta hanyar hydroxypropyl methyl cellulose daban-daban don yin nazarin yuwuwar maye gurbin hydroxypropyl methyl cellulose na cikin gida. Dangane da sakamakon ƙaramin gwajin, ana gudanar da gwajin samarwa.

2. Matakan gwaji 3

Kafin a fara aikin, a tsaftace tukunyar polymerization, a rufe bawul ɗin ƙasa, a ƙara wani adadin ruwan da aka tace, sannan a ƙara mai watsawa; a rufe murfin tukunyar, a yi amfani da injin tsotsa bayan an gama gwajin matsin lamba na nitrogen, sannan a ƙara monomer ɗin vinyl chloride; bayan an gauraya da sanyi, a ƙara mai farawa; A yi amfani da ruwan da ke zagayawa don ɗaga zafin da ke cikin tukunyar zuwa zafin amsawar, sannan a ƙara maganin ammonium bicarbonate a kan lokaci yayin wannan aikin don daidaita ƙimar pH na tsarin amsawar; lokacin da matsin lamba ya faɗi zuwa matsin lamba da aka ƙayyade a cikin dabarar, a ƙara wakili mai ƙarewa da wakili mai narkewa, sannan a fitar da samfurin da aka gama na resin PVC ta hanyar centrifugation da bushewa, sannan a ɗauki samfurin don bincike.

2. 4 Hanyoyin Bincike

Dangane da hanyoyin gwaji masu dacewa a cikin ma'aunin kasuwanci na Q31/0116000823C002-2018, an gwada kuma an yi nazari kan adadin danko, yawan da ke bayyane, abu mai canzawa (gami da ruwa) da kuma shan plasticizer na 100 g na resin PVC na ƙarshe; An gwada matsakaicin girman barbashi na resin PVC; an lura da yanayin barbashi na resin PVC ta amfani da na'urar hangen nesa ta lantarki.

Sakamako 3 da Tattaunawa

3. 1 Binciken kwatancen ingancin nau'ikan resin PVC daban-daban a cikin ƙananan polymerization

Danna 2. Dangane da hanyar gwaji da aka bayyana a cikin 4, an gwada kowace ƙaramin rukuni na resin PVC da aka gama, kuma sakamakon an nuna shi a cikin Jadawali na 2.

Jadawali na 2 sakamakon rukuni daban-daban na ƙananan gwaje-gwaje

Ana iya gani daga Tebur na 2: Yawan da ake gani, adadin danko da kuma yadda ake shanye plasticizer na resin PVC da aka samu sun yi kama da juna ta hanyar amfani da cellulose daban-daban don ƙaramin gwaji; samfurin resin da aka samu ta amfani da dabarar hydroxypropyl methylcellulose ta gida. Matsakaicin girman barbashi ya ɗan ƙarami.

Siffa ta 1 tana nuna hotunan SEM na samfuran resin PVC da aka samu ta amfani da hydroxypropyl methylcellulose daban-daban.

(1)—Hydroxypropyl methylcellulose da aka shigo da shi

(2)—Hydroxypropyl methylcellulose na cikin gida

Hoto na 1 na resins da aka samar a cikin polymerizer mai lita 10 a gaban hydroxypropyl methyl cellulose daban-daban

Za a iya gani daga Hoto na 1 cewa tsarin saman barbashin resin PVC da masu rarraba cellulose daban-daban ke samarwa iri ɗaya ne.

A taƙaice dai, za a iya ganin cewa sinadarin hydroxypropyl methylcellulose na cikin gida da aka gwada a cikin wannan takarda yana da yuwuwar maye gurbin sinadarin hydroxypropyl methylcellulose da aka shigo da shi daga waje.

3. 2 Binciken kwatancen ingancin resin PVC tare da babban matakin polymerization a gwajin samarwa

Saboda tsadar gwaji da haɗarin da ake da shi na samarwa, ba za a iya amfani da cikakken tsarin maye gurbin ƙananan gwaje-gwaje kai tsaye ba. Saboda haka, an ɗauki tsarin ƙara yawan hydroxypropyl methylcellulose na cikin gida a cikin dabarar. Sakamakon gwajin kowane rukuni an nuna shi a cikin Jadawali na 3. da aka nuna.

Tebur 3 Sakamakon gwaji na rukuni daban-daban na samarwa

Za a iya gani daga Jadawali na 3 cewa amfani da hydroxypropyl methylcellulose na cikin gida ya ƙaru a hankali har sai da dukkan rukunin hydroxypropyl methylcellulose na cikin gida suka maye gurbin hydroxypropyl methylcellulose da aka shigo da shi daga waje. Manyan alamomi kamar sha da kuma yawan plasticizer bai canza sosai ba, wanda ke nuna cewa hydroxypropyl methylcellulose na cikin gida da aka zaɓa a cikin wannan takarda zai iya maye gurbin hydroxypropyl methylcellulose da aka shigo da shi daga waje a samarwa.

Kammalawa 4

Jarabawar gidahydroxypropyl methyl celluloseA kan ƙaramin na'urar gwaji mai ƙarfin L 10, tana nuna cewa tana da yuwuwar maye gurbin hydroxypropyl methyl cellulose da aka shigo da shi daga ƙasashen waje; sakamakon gwajin maye gurbin samarwa ya nuna cewa ana amfani da hydroxypropyl methyl cellulose na cikin gida don samar da resin PVC, manyan alamun ingancin resin PVC da aka gama da hydroxypropyl methyl cellulose da aka shigo da su ba su da wani bambanci mai mahimmanci. A halin yanzu, farashin cellulose na cikin gida a kasuwa ya yi ƙasa da na cellulose da aka shigo da shi daga ƙasashen waje. Saboda haka, idan ana amfani da cellulose na cikin gida wajen samarwa, farashin kayan aikin samarwa na iya raguwa sosai.