1. Menene babban aikace-aikacen hydroxypropyl methylcellulose (HPMC)?
Ana amfani da HPMC sosai a cikin kayan gini, sutura, resins na roba, yumbu, magunguna, abinci, yadi, noma, kayan kwalliya, taba da sauran masana'antu. Ana iya raba HPMC zuwa matakin gini, darajar abinci da kuma darajar magunguna bisa ga manufar. A halin yanzu, yawancin samfuran cikin gida sune darajar gini. A cikin aikin gine-gine, ana amfani da foda mai yawa da yawa, kimanin kashi 90% ana amfani da foda, sauran kuma ana amfani da turmi da manne.
2. Akwai nau'ikan hydroxypropyl methylcellulose (HPMC) da yawa, kuma menene bambance-bambancen amfaninsu?
Ana iya raba HPMC zuwa nau'in nan take da nau'in rushewar zafi. Nau'in samfurin nan take yana watsewa da sauri cikin ruwan sanyi kuma ya ɓace cikin ruwa. A wannan lokacin, ruwan ba shi da danko saboda HPMC kawai ana tarwatsewa cikin ruwa ba tare da narkar da gaske ba. Kusan mintuna 2, dankowar ruwa a hankali yana ƙaruwa, yana samar da colloid mai haske. Abubuwan da aka narke mai zafi, lokacin da aka sadu da ruwan sanyi, suna iya watse da sauri cikin ruwan zafi kuma su ɓace cikin ruwan zafi. Lokacin da zafin jiki ya faɗi zuwa wani zafin jiki, danƙon zai bayyana a hankali har sai ya zama colloid mai haske. Za a iya amfani da nau'in zafi mai zafi a cikin foda da turmi kawai. A cikin manne ruwa da fenti, za a sami al'amuran tarukan kuma ba za a iya amfani da su ba. Nau'in nan take yana da fa'idar aikace-aikace. Ana iya amfani dashi a cikin foda da turmi, da manne ruwa da fenti, ba tare da wani contraindications ba.
3. Menene hanyoyin rushewar hydroxypropyl methylcellulose (HPMC)?
Hanyar narkar da ruwan zafi: Tun da HPMC ba ta narke cikin ruwan zafi, ana iya rarraba HPMC daidai a cikin ruwan zafi a matakin farko, sannan kuma da sauri ya narke lokacin da aka sanyaya. Hanyoyi guda biyu na al'ada an bayyana su kamar haka:
1) Sanya adadin ruwan zafi da ake buƙata a cikin akwati kuma yayi zafi zuwa kimanin 70 ° C. A hankali an ƙara hydroxypropyl methylcellulose a ƙarƙashin jinkirin motsawa, da farko HPMC ya yi iyo a saman ruwa, sannan a hankali ya samar da slurry, wanda aka sanyaya a ƙarƙashin motsawa.
2), ƙara 1/3 ko 2/3 na adadin da ake buƙata na ruwa a cikin akwati, kuma zafi shi zuwa 70 ° C, watsar da HPMC bisa ga hanyar 1), da kuma shirya slurry ruwan zafi; sa'an nan kuma ƙara sauran adadin ruwan sanyi zuwa ruwan zafi mai zafi, an sanyaya cakuda bayan ya motsa.
Yadda ake hada foda: sai a hada garin HPMC da sauran abubuwa masu yawa, sai a hada su sosai da mahautsini, sannan a zuba ruwa a narkar da shi, sai a narkar da HPMC a wannan lokaci ba tare da an yi takura ba, domin akwai HPMC kadan a cikin kowane kankanin. kusurwa Powder, zai narke nan da nan lokacin da aka haɗu da ruwa. ——Masu kera foda da turmi suna amfani da wannan hanyar. [Hydroxypropyl methylcellulose (HPMC) ana amfani dashi azaman mai kauri da mai riƙe da ruwa a cikin turmi foda na putty. ]
4. Yadda za a yi hukunci da ingancin hydroxypropyl methylcellulose (HPMC) a sauƙaƙe da fahimta?
(1) Fari: Ko da yake fari ba zai iya tantance ko HPMC yana da sauƙin amfani ba, kuma idan an ƙara abubuwan da ake amfani da su a lokacin aikin samarwa, zai shafi ingancinsa. Duk da haka, yawancin samfurori masu kyau suna da fari mai kyau.
(2) Lalacewa: Mafi kyawun HPMC gabaɗaya yana da raga 80 da raga 100, kuma raga 120 ya ragu. Yawancin HPMC da aka samar a Hebei raga 80 ne. Mafi kyawun ingancin, gabaɗaya magana, mafi kyau.
(3) Canjin haske: sanya hydroxypropyl methylcellulose (HPMC) a cikin ruwa don samar da colloid mai haske, kuma duba haskensa. Mafi girman watsa hasken, mafi kyau, yana nuna cewa akwai ƙarancin insoluble a ciki. . The permeability na a tsaye reactors ne gaba ɗaya mai kyau, kuma na kwance reactors ya fi muni, amma ba yana nufin cewa ingancin reactors a tsaye ya fi na kwance reactors, kuma samfurin ingancin da aka ƙaddara da yawa dalilai.
(4) Takamaiman nauyi: Girman ƙayyadaddun nauyi, mafi nauyi mafi kyau. Ƙayyadaddun ƙayyadaddun yana da girma, gabaɗaya saboda abun ciki na ƙungiyar hydroxypropyl a ciki yana da girma, kuma abun ciki na ƙungiyar hydroxypropyl yana da girma, riƙewar ruwa ya fi kyau.
5. Menene adadin hydroxypropyl methylcellulose (HPMC) a cikin sa foda?
Adadin HPMC da aka yi amfani da shi a cikin aikace-aikacen aikace-aikacen ya bambanta dangane da yanayin yanayi, zafin jiki, ingancin ash ash na gida, dabarar foda na putty da "ingancin da abokan ciniki ke buƙata". Kullum magana, tsakanin 4 kg da 5 kg. Misali: mafi yawan foda a birnin Beijing kilogiram 5 ne; yawancin foda a cikin Guizhou shine kilogiram 5 a lokacin rani da 4.5 kg a cikin hunturu; Adadin putty a Yunnan yana da ɗan ƙaramin ƙarfi, gabaɗaya kilogiram 3 zuwa 4 kg, da sauransu.
6. Menene madaidaicin danko na hydroxypropyl methylcellulose (HPMC)?
Matsakaicin foda yana da yuan 100,000, kuma buƙatun turmi sun fi girma, kuma ana buƙatar yuan 150,000 don sauƙin amfani. Bugu da ƙari, mafi mahimmancin aikin HPMC shine riƙe ruwa, wanda ya biyo baya tare da kauri. A cikin foda mai sakawa, idan dai ruwa yana da kyau kuma danko yana da ƙananan (70,000-80,000), yana yiwuwa kuma. Tabbas, mafi girman danko, mafi kyawun riƙewar ruwa. Lokacin da danko ya wuce 100,000, danko zai shafi riƙewar ruwa. Ba yawa kuma.
7. Menene manyan alamun fasaha na hydroxypropyl methylcellulose (HPMC)?
Abun ciki na Hydroxypropyl da danko, yawancin masu amfani sun damu da waɗannan alamomi guda biyu. Wadanda ke da babban abun ciki na hydroxypropyl gabaɗaya suna da mafi kyawun riƙe ruwa. Wanda ke da babban danko yana da mafi kyawun riƙe ruwa, in mun gwada da (ba cikakke ba), kuma wanda ke da ɗanko mai ƙarfi ya fi amfani da turmi siminti.
8. Menene manyan albarkatun kasa na hydroxypropyl methylcellulose (HPMC)?
Babban albarkatun kasa na hydroxypropyl methylcellulose (HPMC): mai ladabi auduga, methyl chloride, propylene oxide, da sauran albarkatun kasa, caustic soda, acid, toluene, isopropanol, da dai sauransu.
9. Menene babban aikin aikace-aikacen HPMC a cikin foda, kuma yana faruwa ta hanyar sinadarai?
A cikin putty foda, HPMC tana taka rawa uku na kauri, riƙe ruwa da gini. Kauri: Za a iya kauri cellulose don dakatarwa da kuma kiyaye maganin daidai sama da ƙasa, da tsayayya da sagging. Riƙewar ruwa: sanya foda ta bushe a hankali, kuma ta taimaka wa ash calcium don amsawa ƙarƙashin aikin ruwa. Gina: Cellulose yana da sakamako mai lubricating, wanda zai iya sa foda na putty yana da kyakkyawan gini. HPMC baya shiga cikin kowane halayen sinadarai, amma yana taka rawar taimako kawai. Ƙara ruwa a cikin foda da kuma sanya shi a kan bango wani nau'i ne na sinadaran, saboda an samar da sababbin abubuwa. Idan ka cire foda da ke jikin bango daga bangon, ka niƙa shi ya zama foda, ka sake amfani da shi, ba zai yi aiki ba saboda an samu sababbin abubuwa (calcium carbonate). ) kuma. Babban abubuwan da ke cikin ash calcium foda sune: cakuda Ca (OH) 2, CaO da karamin adadin CaCO3, CaO+H2O=Ca(OH)2-Ca(OH)2+CO2=CaCO3↓+H2O Ash calcium yana cikin ruwa da iska Karkashin aikin CO2, ana samar da sinadarin calcium carbonate, yayin da HPMC ke rike da ruwa kawai, yana taimakawa mafi kyawun dauki na ash calcium, kuma baya shiga cikin kowane irin dauki da kansa.
10. HPMC ba ionic cellulose ether, don haka menene wanda ba ionic?
A cikin ma'anar layman, wadanda ba ions abubuwa ne waɗanda ba sa ionize cikin ruwa. Ionization yana nufin tsarin da ake rarraba electrolyte zuwa ions da aka caje wanda zai iya motsawa cikin yardar kaina a cikin wani ƙayyadadden ƙarfi (kamar ruwa, barasa). Misali, sodium chloride (NaCl), gishirin da muke ci kowace rana, yana narkar da ruwa da ionizes don samar da ions sodium ions (Na+) masu motsi da yardar rai da kuma chloride ions (Cl) waɗanda aka caje su. Wato lokacin da aka sanya HPMC a cikin ruwa, ba zai rabu da ions da aka caje ba, amma ya kasance a cikin nau'in kwayoyin halitta.
11. Menene zafin gel na hydroxypropyl methylcellulose da ke da alaƙa?
Zazzabi na gel na HPMC yana da alaƙa da abun ciki na methoxy, ƙananan abun ciki na methoxy ↓, mafi girman zazzabin gel ↑.
12. Shin akwai wata dangantaka tsakanin digo na putty foda da HPMC?
Asarar foda na putty foda yana da alaƙa da ingancin ash calcium, kuma ba shi da alaƙa da HPMC. Ƙananan abun ciki na calcium mai launin toka mai launin toka da daidaitaccen rabo na CaO da Ca (OH) 2 a cikin launin toka zai haifar da asarar foda. Idan yana da wani abu da HPMC, to, idan HPMC yana da rashin ruwa mai kyau, zai haifar da asarar foda. Don takamaiman dalilai, da fatan za a koma ga tambaya ta 9.
13. Menene bambanci tsakanin nau'in ruwan sanyi mai sanyi da nau'in zafi mai narkewa na hydroxypropyl methylcellulose a cikin tsarin samarwa?
Nau'in ruwan sanyi nan take na HPMC ana yi masa magani da glioxal, kuma yana watsewa da sauri cikin ruwan sanyi, amma ba ya narke da gaske. Yana narkewa ne kawai lokacin da danko ya karu. Nau'in narke mai zafi ba a yi masa magani tare da glycoxal. Idan adadin glioxal yana da girma, tarwatsawa zai yi sauri, amma danko zai karu a hankali, kuma idan adadin ya yi kadan, akasin haka zai zama gaskiya.
14. Menene kamshin hydroxypropyl methylcellulose (HPMC)?
The HPMC samar da sauran ƙarfi hanya amfani da toluene da isopropanol a matsayin kaushi. Idan wankan bai yi kyau sosai ba, za a sami ɗan ƙamshi.
15. Yadda za a zabi mai dacewa hydroxypropyl methylcellulose (HPMC) don dalilai daban-daban?
Aikace-aikace na putty foda: buƙatun suna da ƙananan, danko shine 100,000, ya isa, abu mai mahimmanci shine kiyaye ruwa da kyau. Aikace-aikace na turmi: mafi girma bukatun, high danko, 150,000 ne mafi alhẽri. Aikace-aikacen manne: ana buƙatar samfuran nan take tare da babban danko.
16. Menene sunan farko na hydroxypropyl methylcellulose?
Hydroxypropyl methyl cellulose, Turanci: Hydroxypropyl Methyl Cellulose Gajarta: HPMC ko MHPC Alade: hypromellose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropylmethyl cellulose ether. Cellulose hydroxypropyl methyl ether Hyprolose.
17. Aikace-aikacen HPMC a cikin foda, menene dalilin kumfa a cikin foda?
A cikin sa foda, HPMC tana taka rawa uku na kauri, riƙe ruwa da gini. Kada ku shiga cikin kowane hali. Dalilan kumfa: 1. Sanya ruwa da yawa. 2. Ƙarƙashin ƙasa bai bushe ba, kawai zazzage wani Layer a saman, kuma yana da sauƙi don kumfa.
18. Menene ma'anar putty foda don bango na ciki da na waje?
Inner bango putty foda: nauyi alli 800KG, ash calcium 150KG (sitaci ether, tsarki kore, Pengrun ƙasa, citric acid, polyacrylamide, da dai sauransu za a iya ƙara daidai)
Faɗin bangon waje: ciminti 350KG nauyi alli 500KG yashi ma'adini 150KG latex foda 8-12KG cellulose ether 3KG sitaci ether 0.5KG itace fiber 2KG
19. Menene bambanci tsakanin HPMC da MC?
MC shine methyl cellulose, wanda aka yi da ether cellulose ta hanyar magance auduga mai ladabi tare da alkali, ta yin amfani da methane chloride a matsayin wakili na etherification, da kuma tafiya ta hanyar jerin halayen. Gabaɗaya, matakin maye gurbin shine 1.6 ~ 2.0, kuma solubility shima ya bambanta da digiri daban-daban na maye gurbin. Nasa ne ga wadanda ba ionic cellulose ether.
(1) Riƙewar ruwa na methyl cellulose ya dogara da adadin adadinsa, danko, fineness barbashi da rushewar kudi. Gabaɗaya, idan adadin ƙari yana da girma, ƙarancin ƙarancin ƙanƙara ne, kuma danko yana da girma, yawan riƙe ruwa yana da girma. Daga cikin su, adadin ƙarawa yana da tasiri mafi girma a kan yawan adadin ruwa, kuma matakin danko ba daidai ba ne kai tsaye zuwa matakin yawan ruwa. A rushe kudi yafi dogara a kan mataki na surface gyara na cellulose barbashi da barbashi fineness. Daga cikin ethers cellulose da ke sama, methyl cellulose da hydroxypropyl methyl cellulose suna da ƙimar riƙe ruwa mafi girma.
(2) Methylcellulose yana narkewa a cikin ruwan sanyi, kuma zai yi wuya a narke cikin ruwan zafi. Maganin ruwan sa yana da ƙarfi sosai a cikin kewayon pH = 3 ~ 12. Yana da kyau dacewa tare da sitaci, guar danko, da dai sauransu da yawa surfactants. Lokacin da zafin jiki ya kai ga zafin jiki na gelation, gelation yana faruwa.
(3) Canje-canje a cikin zafin jiki zai yi tasiri sosai akan ƙimar riƙe ruwa na methyl cellulose. Gabaɗaya, mafi girman zafin jiki, mafi munin riƙewar ruwa. Idan yawan zafin jiki na turmi ya wuce 40 ° C, riƙewar ruwa na methyl cellulose zai ragu sosai, yana tasiri sosai ga ginin turmi.
(4) Methyl cellulose yana da tasiri mai mahimmanci akan ginin da mannewa na turmi. “Maɗaukaki” a nan yana nufin ƙarfin mannewa da ake ji tsakanin kayan aikin ma’aikaci da katangar bango, wato, juriyar juriyar turmi. Manne yana da girma, juriya na juriya na turmi yana da girma, kuma ƙarfin da ma'aikata ke bukata a cikin aikin da ake amfani da su yana da girma, kuma aikin ginin turmi ba shi da kyau. Methyl cellulose adhesion yana a matsakaicin matakin a cikin samfuran ether cellulose.
HPMC shi ne hydroxypropyl methylcellulose, wanda ba ionic cellulose gauraye ether sanya daga mai ladabi auduga bayan alkalization, ta yin amfani da propylene oxide da methyl chloride a matsayin etherification jamiái, kuma ta hanyar jerin halayen. Matsakaicin maye gaba ɗaya shine 1.2 ~ 2.0. Kaddarorinsa sun bambanta saboda bambancin rabo na abun ciki na methoxyl da abun ciki na hydroxypropyl.
(1) Hydroxypropyl methylcellulose yana da sauƙin narkewa a cikin ruwan sanyi, kuma zai gamu da matsaloli wajen narkewa cikin ruwan zafi. Amma zafinsa na gelation a cikin ruwan zafi yana da girma fiye da na methyl cellulose. Solubility a cikin ruwan sanyi kuma yana inganta sosai idan aka kwatanta da methyl cellulose.
(2) Dankin hydroxypropyl methylcellulose yana da alaƙa da nauyin kwayoyin halitta, kuma mafi girman nauyin kwayoyin halitta, mafi girman danko. Hakanan yanayin zafi yana rinjayar danko, yayin da zafin jiki ya karu, danko yana raguwa. Duk da haka, babban danko yana da ƙananan tasirin zafi fiye da methyl cellulose. Maganin sa yana da ƙarfi idan an adana shi a cikin zafin jiki.
(3) Hydroxypropyl methylcellulose ya tsaya tsayin daka ga acid da alkali, kuma maganinsa mai ruwa ya tsaya tsayin daka a cikin kewayon pH=2 ~ 12. Caustic soda da ruwan lemun tsami suna da ɗan tasiri akan aikin sa, amma alkali na iya hanzarta rushewar kuma yana ƙara danko. Hydroxypropyl methylcellulose ya tsaya tsayin daka ga gishiri na kowa, amma lokacin da maida hankali na maganin gishiri ya yi girma, dankowar maganin hydroxypropyl methylcellulose yana kula da karuwa.
(4) Riƙewar ruwa na hydroxypropyl methylcellulose ya dogara ne akan ƙarin adadinsa, danko, da dai sauransu, kuma yawan ajiyar ruwa a ƙarƙashin adadin adadin adadin ya fi na methyl cellulose.
(5) Hydroxypropyl methylcellulose za a iya haxa shi da ruwa mai narkewa polymer mahadi don samar da uniform da mafi girma danko bayani. Kamar polyvinyl barasa, sitaci ether, kayan lambu danko, da dai sauransu.
(6) Mannewar hydroxypropyl methylcellulose zuwa ginin turmi ya fi na methylcellulose girma.
(7).
20. Menene ya kamata a kula da shi a cikin ainihin aikace-aikacen dangantaka tsakanin danko da zafin jiki na HPMC?
Dankowar HPMC ya yi daidai da yanayin zafi, wato, danko yana ƙaruwa yayin da zafin jiki ya ragu. Dankowar samfurin da muke magana akai yana nufin sakamakon gwajin 2% na maganin ruwa a zazzabi na digiri 20 na ma'aunin celcius.
A cikin aikace-aikace masu amfani, ya kamata a lura cewa a cikin yankunan da ke da manyan bambance-bambancen zafin jiki tsakanin rani da hunturu, ana bada shawarar yin amfani da ƙananan danko a cikin hunturu, wanda ya fi dacewa don ginawa. In ba haka ba, lokacin da zafin jiki ya yi ƙasa, danko na cellulose zai karu, kuma jin daɗin hannun zai yi nauyi lokacin da ake gogewa.
Matsakaici danko: 75000-100000 galibi ana amfani dashi don putty
Dalili: kyakkyawan tanadin ruwa
Babban danko: 150000-200000 An fi amfani dashi don polystyrene barbashi thermal insulation turmi roba foda da vitrified microbead thermal insulation turmi.
Dalili: Danko yana da girma, turmi ba shi da sauƙi ya fadi, sag, kuma an inganta ginin.
Amma gabaɗaya magana, mafi girman danko, mafi kyawun riƙewar ruwa. Sabili da haka, la'akari da farashin, yawancin masana'antun busassun busassun busassun busassun sun maye gurbin cellulose na matsakaici da ƙananan danko (20000-40000) tare da cellulose matsakaici-danko (20000-40000) don rage yawan adadin. .
Lokacin aikawa: Nuwamba 18-2022