Njira Yodziwira Mphamvu ya Gel ya Cellulose Ether

Kuyeza mphamvu yagel osakaniza a cellulose ether, nkhaniyo imasonyeza kuti ngakhale kuti ma cellulose ether gel ndi ogwiritsira ntchito ma profiles monga odzola ali ndi njira zosiyana za gelation, amatha kugwiritsa ntchito kufanana kwa maonekedwe, ndiko kuti, sangathe kuyenda pambuyo pa gelation Mu semi-solid state, njira yowonongeka yomwe imagwiritsidwa ntchito kawirikawiri, njira yozungulira ndi njira yowunikira yowunikira mphamvu ya odzola amagwiritsidwa ntchito poyesa mphamvu ya gel osakaniza a cellulose ether, ndikuwonjezera njira yatsopano yotsatsira mphamvu. Kugwiritsa ntchito njira zinayizi pakuzindikira mphamvu ya cellulose ether gel kunawunikidwa kudzera muzoyeserera. Zotsatira zimasonyeza kuti njira kuonerera akhoza qualitatively kupenda mphamvu ya mapadi etere, kasinthasintha njira si koyenera kuwunika mphamvu ya mapadi etere, ndi zingalowe njira akhoza kupenda mphamvu ya mapadi efa ndi mphamvu pansipa 0,1 MPa, ndi kukakamizidwa kumene kwatsopano kumene Njirayi imatha kuwunika mochulukira mphamvu ya gel osakaniza a cellulose ether.

Mawu ofunikira: odzola; cellulose ether gel; mphamvu; njira

0.Mawu Oyamba

Ma polima opangira mafuta opangira ma jelly amagwiritsidwa ntchito kwambiri popanga madzi akumunda wamafuta ndikuwongolera mbiri. Komabe, m'zaka zaposachedwa, plugging ya gel cellulose ether plugging and control system yosamva kutentha komanso yosinthira kutentha kwapang'onopang'ono yakhala malo opangira kafukufuku wothira madzi ndikuwongolera mbiri m'malo osungira mafuta olemera. . Mphamvu ya gel ya cellulose ether ndi chimodzi mwa zizindikiro zofunika kwambiri pakupanga plugging, koma palibe muyezo wofanana wa njira yake yoyesera mphamvu. Njira zomwe zimagwiritsidwa ntchito kawirikawiri poyesa mphamvu ya jelly, monga njira yowonera - njira yolunjika komanso yotsika mtengo yoyesera mphamvu ya jelly, gwiritsani ntchito tebulo la code jelly mphamvu kuti muyese mlingo wa mphamvu ya gel kuti muyese; njira yozungulira - zida zomwe zimagwiritsidwa ntchito kwambiri ndi Brookfield viscometer ndi rheometer, kutentha kwa mayeso a Brookfield viscometer kuyesa kumakhala kochepa mkati mwa 90°C; njira yotulutsira vacuum - pamene mpweya umagwiritsidwa ntchito kupyola gel, kuwerengera kwakukulu kwa kupima kuthamanga kumayimira mphamvu ya gel. Njira yopangira mafuta odzola ndikuwonjezera njira yolumikizirana ndi polima. Wothandizira mtanda ndi unyolo wa polima amalumikizidwa ndi zomangira za mankhwala kuti apange mawonekedwe opangira malo, ndipo gawo lamadzimadzi limakulungidwa mmenemo, kotero kuti dongosolo lonse limataya fluidity, ndiyeno limasintha Kwa odzola, njirayi si yosinthika ndipo ndi kusintha kwa mankhwala. The gel osakaniza limagwirira wa mapadi ether ndi kuti pa kutentha otsika, ndi macromolecules wa mapadi etere wazunguliridwa ndi mamolekyu ang'onoang'ono a madzi kudzera hydrogen zomangira kupanga njira amadzimadzi. Pamene kutentha kwa yankho kumakwera, zomangira za haidrojeni zimawonongedwa, ndipo mamolekyu akuluakulu a cellulose ether Dziko limene mamolekyu amasonkhana pamodzi mwa kuyanjana kwa magulu a hydrophobic kupanga gel ndi kusintha kwa thupi. Ngakhale kuti njira ya gelation ya awiriwa ndi yosiyana, maonekedwe ali ndi chikhalidwe chofanana, ndiye kuti, dziko losasunthika lokhazikika limapangidwa m'magawo atatu. Kaya njira yowunikira mphamvu ya odzola ndiyoyenera kuyesa mphamvu ya gel osakaniza a cellulose ether ikufunika kufufuzidwa ndi kutsimikizira koyeserera. Papepalali, njira zitatu zachikhalidwe zimagwiritsidwa ntchito poyesa mphamvu ya ma gels a cellulose ether: njira yowonera, njira yozungulira komanso njira yotulutsira vacuum, ndipo njira yotsatsira bwino imapangidwa pamaziko awa.

1. Gawo loyesera

1.1 Zida zazikulu zoyesera ndi zida

Kusamba kwamadzi nthawi zonse kutentha kwamadzi, DZKW-S-6, Beijing Yongguangming Medical Instrument Co., Ltd.; kutentha kwambiri komanso kuthamanga kwa rheometer, MARS-III, Germany HAAKE kampani; ozungulira madzi Mipikisano zolinga vacuum mpope, SHB-III, Gongyi Red Instrument Equipment Co., Ltd .; sensa, DP1701-EL1D1G, Baoji Best Control Technology Co., Ltd.; dongosolo kuthamanga kupeza, Shandong Zhongshi Dashiyi Technology Co., Ltd.; colorimetric chubu, 100 mL, Tianjin Tianke Glass Instrument Manufacturing Co., Ltd .; botolo lagalasi lopanda kutentha kwambiri, 120 mL, Schott Glass Works, Germany; Nayitrogeni wapamwamba kwambiri, Tianjin Gaochuang Baolan Gas Co., Ltd.

1.2 Zitsanzo zoyesera ndi kukonzekera

Hydroxypropyl methylcellulose ether, 60RT400, Taian Ruitai Cellulose Co., Ltd.; Sungunulani 2g, 3g ndi 4g wa hydroxypropylmethylcellulose etha mu 50 mL madzi otentha pa 80℃, sakanizani bwino ndikuwonjezera 25℃wa 50 mL madzi ozizira, zitsanzo anali kwathunthu kusungunuka kupanga mapadi etere njira ndi woipa wa 0.02g/mL, 0.03g/mL ndi 0.04g/mL motero.

1.3 Njira yoyesera yoyesera mphamvu ya cellulose ether gel

(1) Kuyesedwa ndi njira yowonera. Kuthekera kwa mabotolo agalasi osamva kutentha kwapakamwa kwakukulu omwe amagwiritsidwa ntchito poyesera ndi 120mL, ndipo kuchuluka kwa yankho la cellulose ether ndi 50mL. Ikani mayankho okonzeka a cellulose ether okhala ndi 0.02g/mL, 0.03g/mL ndi 0.04g/mL mubotolo lagalasi losagwira kutentha kwambiri, sinthani pazitentha zosiyanasiyana, ndikuyerekeza magawo atatu omwe ali pamwambapa molingana ndi mphamvu ya gel osakaniza. Mphamvu ya gelling ya cellulose ether amadzimadzi yankho anayesedwa.

(2) Kuyesedwa ndi njira yozungulira. Chida choyesera chomwe chimagwiritsidwa ntchito poyesera ichi ndi rheometer yotentha kwambiri komanso yothamanga kwambiri. Mankhwala a cellulose ether amadzimadzi okhala ndi 2% amasankhidwa ndikuyikidwa mu ng'oma kuti ayesedwe. Mtengo wa kutentha ndi 5℃/ 10 min, kumeta ubweya ndi 50 s-1, ndipo nthawi yoyesera ndi 1 min. , Kutentha kwapakati ndi 40～110℃.

(3) Kuyesedwa ndi njira ya vacuum yopambana. Lumikizani machubu a colorimetric omwe ali ndi gel, yatsani pampu ya vacuum, ndipo werengani kuchuluka kwa kuchuluka kwa mphamvu yopimira mpweya pamene mpweya ukudutsa mu gel. Chitsanzo chilichonse chimagwiritsidwa ntchito katatu kuti apeze mtengo wapakati.

(4) Yesani ndi njira yopondereza yabwino. Malinga ndi mfundo ya njira ya digiri ya vacuum, tasintha njira yoyeserayi ndikutengera njira yolimbikitsira. Lumikizani machubu a colorimetric okhala ndi gel, ndipo gwiritsani ntchito makina otengera kuthamanga kuti muyese mphamvu ya gel osakaniza a cellulose ether. Kuchuluka kwa gel osakaniza omwe amagwiritsidwa ntchito poyesera ndi 50mL, mphamvu ya chubu ya colorimetric ndi 100mL, mkati mwake ndi 3cm, mkati mwa chubu chozungulira chomwe chimayikidwa mu gel osakaniza ndi 1cm, ndipo kuya kwake ndi 3cm. Yatsani pang'onopang'ono kusintha kwa silinda ya nayitrogeni. Pamene deta yowonetsera ikutsika mwadzidzidzi komanso mwamphamvu, tengani malo apamwamba kwambiri monga mphamvu yamtengo wapatali yofunikira kuti mudutse gel osakaniza. Chitsanzo chilichonse chimagwiritsidwa ntchito katatu kuti apeze mtengo wapakati.

2. Zotsatira zoyeserera ndi kukambirana

2.1 Kugwiritsa ntchito njira yowonera kuyesa mphamvu ya gel ya cellulose ether

Chifukwa cha kuwunika mphamvu ya gel osakaniza a cellulose ether poyang'ana, kutenga njira ya cellulose ether yokhala ndi 0.02 g/mL mwachitsanzo, zitha kudziwika kuti mphamvu ndi A pamene kutentha kuli 65.°C, ndipo mphamvu imayamba kuwonjezeka pamene kutentha kumawonjezeka, kutentha kumafika 75℃, imakhala ndi mawonekedwe a gel, mphamvu imasintha kuchokera ku B kupita ku D, ndipo kutentha kukakwera kufika pa 120.℃, kalasi ya mphamvu imakhala F. Zitha kuwoneka kuti zotsatira zowunikira za njira yowunikirayi zimangosonyeza mphamvu ya gel, koma sangathe kugwiritsa ntchito deta kufotokoza mphamvu yeniyeni ya gel, ndiko kuti, ndi khalidwe koma osati. kuchuluka. Ubwino wa njirayi ndikuti ntchitoyo ndi yosavuta komanso yodziwika bwino, ndipo gel osakaniza ndi mphamvu yofunikira akhoza kuyang'aniridwa motsika mtengo ndi njirayi.

2.2 Kugwiritsa ntchito njira yozungulira kuyesa mphamvu ya gel ya cellulose ether

Pamene yankho litenthedwa mpaka 80°C, kukhuthala kwa yankho ndi 61 mPa·s, ndiye mamasukidwe akayendedwe amakula mofulumira, ndi kufika pa mtengo pazipita 46 790 mPa·ku 100s°C, ndiyeno mphamvu imachepa. Izi sizikugwirizana ndi zomwe zidawonedwa kale kuti kukhuthala kwa hydroxypropyl methylcellulose ether aqueous solution kumayamba kuwonjezeka pa 65.°C, ndipo ma gels amawoneka pafupifupi 75°C ndi mphamvu ikupitiriza kuwonjezeka. Chifukwa cha chodabwitsa ichi ndi chakuti gel osakaniza amathyoledwa chifukwa cha kuzungulira kwa rotor poyesa mphamvu ya gel ya cellulose ether, zomwe zimapangitsa kuti pakhale deta yolakwika ya mphamvu ya gel pa kutentha kotsatira. Choncho, njirayi si yoyenera kuyesa mphamvu ya ma cellulose ether gels.

2.3 Kugwiritsa ntchito njira yopulumutsira yowunikira kuyesa mphamvu ya gel osakaniza a cellulose ether

Zotsatira zoyesera za mphamvu ya cellulose ether gel zidawunikidwa ndi njira yotulutsira vacuum. Njirayi siyimaphatikizapo kuzungulira kwa rotor, kotero vuto la kumeta ubweya wa colloidal ndi kusweka chifukwa cha kuzungulira kwa rotor likhoza kupewedwa. Kuchokera pazotsatira zoyeserera pamwambapa, zitha kuwoneka kuti njirayi imatha kuyesa mphamvu ya gel osakaniza. Pamene kutentha ndi 100°C, mphamvu ya cellulose etha gel osakaniza ndi ndende ya 4% ndi wamkulu kuposa 0,1 MPa (pazipita zingalowe digiri), ndipo mphamvu sangathe kuyeza kuposa 0,1 MPa. Mphamvu ya gel, ndiko kuti, malire apamwamba a mphamvu ya gel oyesedwa ndi njirayi ndi 0.1 MPa. Pakuyesa uku, mphamvu ya cellulose ether gel ndi yayikulu kuposa 0,1 MPa, kotero njira iyi si yoyenera kuyesa mphamvu ya cellulose ether gel.

2.4 Kugwiritsa ntchito njira yopondereza yabwino kuyesa mphamvu ya gel osakaniza a cellulose ether

Njira yopondereza yabwino idagwiritsidwa ntchito kuyesa zotsatira zoyeserera za mphamvu ya cellulose ether gel. Zitha kuwoneka kuti njirayi imatha kuyesa gel osakaniza ndi mphamvu yoposa 0,1 MPa. Njira yopezera deta yomwe imagwiritsidwa ntchito poyesera imapangitsa zotsatira zoyesera kukhala zolondola kuposa deta yowerengera yopangira mu njira ya digiri ya vacuum.

3. Mapeto

Mphamvu ya gel ya cellulose ether ikuwonetsa kuchulukirachulukira ndikuwonjezeka kwa kutentha. Njira yozungulira komanso njira yopulumutsira zotsekemera sizoyenera kudziwa mphamvu ya gel osakaniza a cellulose ether. Njira yowunikira imatha kuyeza mwamphamvu mphamvu ya gel osakaniza a cellulose ether, ndipo njira yatsopano yolimbikitsira yomwe ingowonjezera imatha kuyesa mphamvu ya gel osakaniza a cellulose ether.