E aʻo i ka hana rheological o konjac glucomannan a me hydroxypropyl methylcellulose compound system

Ua lawe ʻia ka ʻōnaehana hui o konjac glucomannan (KGM) a me ka hydroxypropyl methylcellulose (HPMC) i mea noiʻi, a ua hoʻokō ʻia nā hoʻāʻo ʻana o ka shear steady-state, frequency a me ka wela ma luna o ka ʻōnaehana hui e ka rheometer rotational. Ua kālailai ʻia ka mana o ka haʻihaʻi nui a me ka ratio hui ma ka viscosity a me nā waiwai rheological o KGM/HPMC. Hōʻike nā hopena i ka ʻōnaehana hui KGM / HPMC he wai non-Newtonian, a ʻo ka hoʻonui ʻana i ka hapa nui a me ka ʻike KGM o ka ʻōnaehana e hoʻemi i ka wai o ka hoʻonā hui a hoʻonui i ka viscosity. Ma ka moku'āina sol, hoʻokumu nā kaulahao molekala KGM a me HPMC i kahi hoʻolālā paʻakikī ma o ka pilina hydrophobic. ʻO ka hoʻonui ʻana i ka hapa nui o ka ʻōnaehana a me ka ʻike KGM e kūpono i ka mālama ʻana i ka paʻa o ka hale. Ma ka ʻōnaehana haʻahaʻa haʻahaʻa haʻahaʻa, hoʻonui i ka ʻike o KGM he mea pono i ka hoʻokumu ʻana i nā gels thermotropic; ʻoiai i loko o ka ʻōnaehana hakina kiʻekiʻe, ʻo ka hoʻonui ʻana i ka maʻiʻo o ka HPMC e kūpono i ka hoʻokumu ʻana i nā gels thermotropic.

Hua'ōlelo nui:konjac glucomannan; hydroxypropyl methylcellulose; pūhui; ʻano rheological

Hoʻohana nui ʻia nā polysaccharides kūlohelohe i ka ʻoihana meaʻai ma muli o kā lākou mānoanoa, emulsifying a me nā waiwai gelling. ʻO Konjac glucomannan (KGM) he polysaccharide mea kanu maoli, i haku ʻia meβ-D-glucose a meβ-D-mannose i ka ratio o 1.6:1, ua hoʻopili ʻia nā mea ʻelua eβ-1,4 glycosidic paʻa, i loko o ka C- Aia ka liʻiliʻi o ka acetyl ma ke kūlana 6 (ma kahi o 1 acetyl no kēlā me kēia 17 koena). Eia naʻe, ʻo ka viscosity kiʻekiʻe a me ka maikaʻi ʻole o ka wai wai KGM e kaupalena i kāna noi i ka hana. ʻO ka Hydroxypropyl methylcellulose (HPMC) he propylene glycol ether o ka methylcellulose, nona ka non-ionic cellulose ether. ʻO ka HPMC he kiʻiʻoniʻoni, hiki ke hoʻololi i ka wai. HPMC i haʻahaʻa viscosity a me ka ikaika gel ma haʻahaʻa wela, a me ka ilihune kaʻina hana, akā, hiki ke hana i ka viscous paʻa-like gel i kiʻekiʻe wela, no laila, he nui hana kaʻina hana pono e lawe 'ia ma ke kiʻekiʻe wela, ka hopena i kiʻekiʻe hana ikehu hoʻohana. He kiʻekiʻe nā kumukūʻai hana. Hōʻike ka moʻolelo e hiki ke hoʻokumu ʻia ka ʻāpana mannose unsubstituted ma ke kaulahao mole KGM i kahi ʻāpana hui hydrophobic i hoʻopili ʻia me ka hui hydrophobic ma ke kaulahao molekika HPMC ma o ka pilina hydrophobic. Hiki i kēia hale ke hoʻopaneʻe a pale ʻāpana i ka gelation thermal o HPMC a hoʻohaʻahaʻa i ka mahana gel o HPMC. Eia kekahi, i ka nānā ʻana i nā waiwai haʻahaʻa haʻahaʻa o HPMC i nā haʻahaʻa haʻahaʻa haʻahaʻa, ua wānana ʻia ʻo kāna hui ʻana me KGM hiki ke hoʻomaikaʻi i nā waiwai kiʻekiʻe-viscosity o KGM a hoʻomaikaʻi i kāna hana hana. No laila, e kūkulu kēia pepa i kahi ʻōnaehana hui KGM/HPMC e ʻimi i ka mana o ka hāʻina haʻihaʻi nuipaʻa a me ka ratio hoʻohuihui i nā waiwai rheological o ka ʻōnaehana KGM/HPMC, a hāʻawi i kahi kuhikuhi no ka noi ʻana o ka ʻōnaehana hui KGM/HPMC ma ka ʻoihana meaʻai.

1. Nā mea a me nā ʻano hana

1.1 Nā mea a me nā reagents

Hydroxypropyl methylcellulose, KIMA CHEMICAL CO.,LTD, hakina nui 2%, viscosity 6 mPa·s; ka hapa nui methoxy 28%~30%; hāpana nui hydroxypropyl 7.0%~12% .

Konjac glucomannan, Wuhan Johnson Konjac Food Co., Ltd., 1 wt% aqueous solution viscosity≥28 000 mPa·s.

1.2 Nā mea hana a me nā mea hana

MCR92 rotational rheometer, Anton Paar Co., Ltd., Austria; UPT-II-10T mīkini wai ultrapure, Sichuan Youpu Ultrapure Technology Co., Ltd.; AB-50 kaulike analytical electronic, hui Swiss Mette; LHS-150HC ʻauʻau wai wela mau, Wuxi Huaze Technology Co., Ltd.; ʻO JJ-1 Mea Hoʻoulu Uila, Hale Hana Mea Hana Lapaʻau ʻo Jintan, Jiangsu Province.

1.3 Ka hoʻomākaukau ʻana i ka hopena hui

E kaupaona i nā pauka HPMC a me KGM me kahi ratio hui pū ʻia (lakiko nui: 0:10, 3:7, 5:5, 7:3, 10:0), e hoʻohui mālie iā lākou i loko o ka wai deionized i loko o kahi 60.°C ʻauʻau wai, a hoʻonāuki no 1.5~ 2 h e hoʻopuehu like, a hoʻomākaukau i 5 ʻano o nā haʻina gradient me nā hakina paʻa paʻa o 0.50%, 0.75%, 1.00%, 1.25%, a me 1.50%, kēlā me kēia.

1.4 Ho'āʻo i nā waiwai rheological o ka hoʻonā hui

ʻO ka ho'āʻo shear state steady-state: Ua anaʻia ka'ōniu rheological o ka hopena hui KGM/HPMC me ka hoʻohanaʻana i ka cone CP50 a me ka pā, ua hoʻopaʻaʻia ka āpau ma waena o nā papa luna a me lalo i 0.1 mm,ʻo 25 ke ana wela.°C, a he 0.1 a hiki i ka 100 s-1 ka laula o ka au.

Strain scanning (hoʻoholo ʻana i ka ʻāina viscoelastic linear): E hoʻohana i ka pā PP50 e ana i ka linear viscoelastic region a me ke kānāwai hoʻololi modulus o KGM/HPMC compound solution, hoʻonoho i ka spacing i 1.000 mm, alapine paʻa i ka 1Hz, a me ke ana wela i 25°C. ʻO 0.1% ~ 100%.

Holoi pinepine: E hoʻohana i ka pā PP50 e ana i ka hoʻololi modulus a me ka hilinaʻi pinepine o ka hoʻonā hui KGM/HPMC. Hoʻonohonoho ʻia ka spacing i 1.000 mm, ʻo ke kānana he 1%, ʻo ke ana ʻana he 25.°C, a he 0.1-100 Hz ke alapine.

Ka nānā ʻana i ka mahana: Ua ana ʻia ka modulus a me kona hilinaʻi ʻana i ka wela o ka hopena hui KGM/HPMC me ka pā PP50, ua hoʻonohonoho ʻia ka spacing i 1.000 mm, ʻo 1 Hz ke alapine paʻa, ʻo 1% ka deformation, a ʻo ka mahana mai 25. i 90°C.

2. Nā hualoaʻa a me ka nānā ʻana

2.1 Ka nānā 'ana i ka pihi kahe o KGM/HPMC

ʻO ka viscosity versus shear rate curve o nā hāʻina KGM/HPMC me nā lakio hui like ʻole ma nā hakina nuipaʻa like ʻole. ʻO nā wai nona ka viscosity he hana laina o ka shear rate ua kapa ʻia ʻo Newtonian fluids, i ʻole ua kapa ʻia lākou he wai non-Newtonian. Hiki ke ʻike ʻia mai ka ʻaʻe ʻana e emi iho ana ka viscosity o ka solution KGM a me KGM/HPMC compound me ka piʻi ʻana o ka shear rate; ʻoi aku ka kiʻekiʻe o ka maʻiʻo KGM, ʻoi aku ka kiʻekiʻe o ka hapa nui o ka ʻōnaehana, a ʻoi aku ka maopopo o ke ʻano shear thinning o ka hopena. Hōʻike kēia ʻo KGM a me KGM/HPMC ʻōnaehana hui he mau wai non-Newtonian, a ʻo ke ʻano wai o ka ʻōnaehana hui KGM/HPMC e hoʻoholo nui ʻia e KGM.

Mai ka helu kahe a me ka viscosity coefficient o KGM/HPMC solutions me nā hakina like ʻole a me nā ratio hui like ʻole, hiki ke ʻike ʻia ʻo nā helu n o nā ʻōnaehana hui KGM, HPMC a me KGM/HPMC he liʻiliʻi ma mua o 1, e hōʻike ana i nā haʻina. nā wai pseudoplastic a pau. No ka ʻōnaehana hui KGM/HPMC, ʻo ka hoʻonui ʻia ʻana o ka hapa nui o ka ʻōnaehana e hoʻopili ai a me nā pilina ʻē aʻe ma waena o nā kaulahao molekala HPMC a me KGM i loko o ka hopena, e hōʻemi ana i ka neʻe ʻana o nā kaulahao molekala, a laila e hōʻemi ana i ka waiwai n o. ka ʻōnaehana. I ka manawa like, me ka hoʻonui ʻana o ka ʻike KGM, ua hoʻonui ʻia ka pilina ma waena o nā kaulahao mole KGM i loko o ka ʻōnaehana KGM/HPMC, a laila e hōʻemi ana i kona neʻe ʻana a hopena i ka emi ʻana o ka waiwai n. ʻO ka mea ʻē aʻe, ke piʻi mau nei ka waiwai K o ka hāʻina hui KGM/HPMC me ka hoʻonui ʻana o ka haʻihaʻi nui a me ka ʻike KGM, ʻo ia ka mea ma muli o ka piʻi ʻana o ka hapa nui o ka ʻōnaehana a me ka ʻike KGM, e hoʻonui ai i ka ʻike nā hui hydrophilic i ka ʻōnaehana. , e hoʻonui i ka pilina mole i loko o ke kaulahao mole a ma waena o nā kaulahao, ma laila e hoʻonui ai i ka radius hydrodynamic o ka mole, e hoʻemi ana i ka hoʻonohonoho ʻana ma lalo o ka hana o ka ikaika shear waho a me ka hoʻonui ʻana i ka viscosity.

Hiki ke helu 'ia ke kumu waiwai o ka viscosity zero-shear o ka hui hui KGM/HPMC e like me ka logarithmic summation loina maluna, a hiki ke loaa kona waiwai ho'okolohua ma o Carren fitting extrapolation o ka viscosity-shear rate curve. I ka hoʻohālikelike ʻana i ka waiwai wānana o ka viscosity zero-shear o ka ʻōnaehana hui KGM/HPMC me nā hakina nuipaʻa like ʻole a me nā lakio hoʻohui like ʻole me ka waiwai hoʻokolohua, hiki ke ʻike ʻia ka waiwai maoli o ka viscosity zero-shear o ka hui KGM/HPMC. ʻoi aku ka liʻiliʻi o ka haʻina ma mua o ke kumu waiwai. Ua hōʻike ʻia ua hoʻokumu ʻia kahi hui hou me kahi ʻano paʻa i ka ʻōnaehana paʻakikī o KGM a me HPMC. Ua hōʻike ʻia nā haʻawina e kū nei e hiki i nā ʻāpana mannose i hoʻololi ʻole ʻia ma ke kaulahao mole KGM ke launa pū me nā pūʻulu hydrophobic ma ke kaulahao molekula HPMC e hana i kahi ʻāpana hui hydrophobic i hoʻopili ʻia. Manaʻo ʻia ʻo ka hale hui hou me kahi ʻano paʻa paʻa i hoʻokumu ʻia ma o nā pilina hydrophobic. Ke haʻahaʻa ka lakio KGM (HPMC> 50%), ʻoi aku ka haʻahaʻa o ka waiwai maoli o ka viscosity zero-shear o ka ʻōnaehana KGM/HPMC ma mua o ka waiwai theoretical, e hōʻike ana i ka haʻahaʻa KGM maʻiʻo, ʻoi aku ka nui o nā moleke komo i ka denser hou. hale kūkulu. I ka hoʻokumu ʻana o , ua hoʻemi hou ʻia ka viscosity zero-shear o ka ʻōnaehana.

2.2 Ka ʻike ʻana i nā ʻāʻī sweep o ka ʻōnaehana hui KGM/HPMC

Mai ka pilina pili o ka modulus a me ka shear strain o KGM/HPMC solutions me nā hakina like ʻole a me nā ratio hui like ʻole, hiki ke ʻike ʻia i ka emi ʻana o ke kānana shear ma mua o 10%, ʻo ka G.'a me G″ʻAʻole e piʻi aʻe ka ʻōnaehana hui pū me ka ʻāʻī. Eia nō naʻe, hōʻike ia i loko o kēia ʻano ʻāwili ʻāwili, hiki i ka ʻōnaehana hui ke pane i nā hoʻoulu ʻana o waho ma o ka hoʻololi ʻana o ke kaulahao molecular conformation, a ʻaʻole i pōʻino ke ʻano o ka ʻōnaehana hui. Ke ʻoi aku ka ʻoi aku o ka shear ma> 10%, ka waho Ma lalo o ka hana o ka ikaika shear, ʻoi aku ka wikiwiki o ka wehe ʻana o nā kaulahao mole i loko o ka ʻōnaehana paʻakikī ma mua o ka wikiwiki entanglement, G'a me G″hoʻomaka e emi, a komo ka ʻōnaehana i ka ʻāina viscoelastic nonlinear. No laila, i ka ho'āʻo alapine hoʻoikaika ma hope, ua koho ʻia ka ʻāpana shear strain i 1% no ka hoʻāʻo.

2.3 Ka nānā ʻana i ka ʻāwili ʻana o ka ʻōnaehana KGM/HPMC

Nā ʻōkuhi hoʻololi o ka modulus waihona a me ka modulus poho me ke alapine no nā hāʻina KGM/HPMC me nā lakio hui like ʻole ma lalo o nā hakina nuipaʻa like ʻole. Hōʻike ka modulus G' i ka ikehu i hiki ke hoʻihoʻi ʻia ma hope o ka waiho ʻana i ka hoʻāʻo ʻana, a ʻo ka modulus G" ʻo ia ka ikehu e pono ai no ke kahe mua, ʻo ia ka poho hiki ʻole ke hoʻololi ʻia i ka wela shear. Hiki ke ʻike ʻia, me ka piʻi ʻana o ke alapine oscillation, ʻo ka modulus nalowale G″ʻoi aku ka nui ma mua o ka modulus mālama G', e hōʻike ana i ke ʻano wai. Ma ka laula alapine ho'āʻo, hoʻonui ka modulus mālama G' a me ka modulus G" me ka piʻi ʻana o ke alapine oscillation. ʻO ka mea nui kēia ma muli o ka hoʻonui ʻana o ka pinepine oscillation, ʻaʻohe manawa o nā ʻāpana kaulahao mole i loko o ka ʻōnaehana e hoʻihoʻi i ka deformation i ka manawa pōkole ʻO ka mokuʻāina ma mua, no laila e hōʻike ana i ke ʻano o ka hiki ke mālama ʻia ka ikehu. nui loa G') a i ʻole pono e nalowale (G″).

Me ka piʻi ʻana o ka alapine oscillation, hāʻule koke ka modulus mālama o ka ʻōnaehana, a me ka piʻi ʻana o ka hakina nui a me ka ʻike KGM o ka ʻōnaehana, piʻi mālie ka helu alapine o ka hāʻule koke. ʻO ka hāʻule koke ʻana ma muli paha o ka luku ʻia ʻana o ka hale paʻa i hoʻokumu ʻia e ka hui hydrophobic ma waena o KGM a me HPMC i loko o ka ʻōnaehana ma ka ʻoki ʻoki waho. Eia kekahi, ʻo ka hoʻonui ʻana i ka hapa nui o ka ʻōnaehana a me ka maʻiʻo KGM he mea pono e mālama i ka paʻa o ka hale paʻa, a hoʻonui i ka waiwai alapine o waho e luku ai i ka hale.

2.4 Ka nānā 'ana i ka piko hulina wela o KGM/HPMC composite system

Mai nā pihi o ka modulus waihona a me ka modulus poho o nā hāʻina KGM/HPMC me nā hakina nuipaʻa like ʻole a me nā lakio hoʻohui like ʻole, hiki ke ʻike ʻia i ka wā o ka hapa nui o ka ʻōnaehana he 0.50%, ka G'a me G″ʻAʻole hiki ke hoʻololi i ka hopena HPMC me ka mahana. , a me G″>G', ka viscosity o ka ʻōnaehana hoʻomalu; ke piʻi ka hakina nui, ʻo ka G'ʻAʻole hoʻololi ʻia ka hoʻonā HPMC a laila piʻi nui, a ʻo G'a me G″hui ma kahi o 70°C (ʻO ka wela o ke kikowaena ka helu gel), a ua hana ka ʻōnaehana i ka gel i kēia manawa, no laila e hōʻike ana ʻo HPMC he gel i hoʻokomo ʻia i ka wela. No ka hoʻonā KGM, inā he 0.50% a me 0.75% ka hapa nui o ka ʻōnaehana, ʻo ka G.'a ʻo G o ka ʻōnaehana "hōʻike i kahi ʻano emi iho; ke piʻi aʻe ka hakina nui, e emi mua ka G' a me G” o ka hoʻonā KGM a laila e hoʻonui nui ʻia, e hōʻike ana i ka hoʻonā KGM e hōʻike ana i nā waiwai like me ka gel ma nā hakina kiʻekiʻe a me nā wela kiʻekiʻe.

Me ka piʻi ʻana o ka mahana, ʻo G'a me G″o ka ʻōnaehana paʻakikī KGM/HPMC i emi mua a laila hoʻonui nui ʻia, a ʻo G'a me G″ua ʻike ʻia nā wahi intersection, a ua hana ka ʻōnaehana i kahi gel. Ke loaʻa nā molekala HPMC i ka wela haʻahaʻa, hiki ke hoʻopaʻa ʻia ka hydrogen ma waena o nā pūʻulu hydrophilic ma ke kaulahao molekala a me nā molekala wai, a i ka piʻi ʻana o ka mahana, hoʻopau ka wela i hoʻohana ʻia i nā paʻa hydrogen i hoʻokumu ʻia ma waena o HPMC a me nā molekole wai, e hopena i ka hoʻokumu ʻana o HPMC macromolecular. kaulahao. Hōʻike ʻia nā pūʻulu hydrophobic ma ka ʻili, hana ʻia ka hui hydrophobic, a hoʻokumu ʻia kahi gel thermotropic. No ka ʻōnaehana hakina haʻahaʻa haʻahaʻa, ʻoi aku ka nui o nā mea KGM hiki ke hana i ka gel; no ka ʻōnaehana hakina kiʻekiʻe, ʻoi aku ka nui o ka ʻike HPMC hiki ke hana i ka gel. Ma ka haʻahaʻa haʻahaʻa haʻihaʻi nenoai (0.50%), i ka hiki ana o KGM molekele hoemi i ka likelika o ka hana hydrogen paʻa ma waena o HPMC mole, ma laila e hoʻonui i ka hiki o ka ike ana o hydrophobic pūʻulu i loko o HPMC mole, i mea conducive i ke kukulu ana o thermotropic gels. I loko o ke kiʻekiʻe kiʻekiʻe lehulehu hakina nenoaiu, ina ka maʻiʻo o KGM kiʻekiʻe loa, ka viscosity o ka'ōnaehana ua kiʻekiʻe, i ole conducive i ka hydrophobic hui ma waena o HPMC a me KGM molekele, i ole conducive i ke kukulu ana i ka thermogenic gel.

3. Ka hopena

Ma kēia pepa, ua aʻo ʻia ka ʻano rheological o ka ʻōnaehana hui o KGM a me HPMC. Hōʻike nā hopena i ka ʻōnaehana hui o KGM/HPMC he wai non-Newtonian, a ʻo ke ʻano wai o ka ʻōnaehana hui o KGM/HPMC e hoʻoholo nui ʻia e KGM. ʻO ka hoʻonui ʻana i ka hapa nui o ka ʻōnaehana a me ka ʻike KGM i hoʻemi i ka wai o ka hoʻonā hui a hoʻonui i kona viscosity. Ma ka moku'āina sol, ua ho'okumu 'ia nā kaulahao mole o KGM a me HPMC i mea 'oi aku ka pa'a ma o ka pilina hydrophobic. Hoʻopau ʻia ke ʻano o ka ʻōnaehana e ka ʻako ʻana o waho, e hopena i ka hāʻule koke ʻana o ka modulus mālama o ka ʻōnaehana. ʻO ka hoʻonui ʻana o ka hapa nui o ka ʻōnaehana a me ka ʻike KGM he mea maikaʻi ia e mālama i ka paʻa o ka hale paʻa a hoʻonui i ka waiwai alapine o waho e luku ai i ka hale. No ka ʻōnaehana haʻahaʻa haʻahaʻa haʻahaʻa, ʻoi aku ka nui o ka ʻike KGM i ka hana ʻana i ka gel; no ka ʻōnaehana hakina kiʻekiʻe, ʻoi aku ka maikaʻi o ka ʻike HPMC i ka hana ʻana o ka gel.