Inkcazo:Ukuze kubuyiselwe i-polyvinyl alcohol engaboliyo (PVA) slurry, i-hemp stalk cellulose ether-hydroxypropyl methylcellulose yalungiswa ukusuka kwizikhondo zenkunkuma ye-hemp yezolimo, kwaye ixutywe nesitatshi esikhethekileyo ukulungisa uludaka.Umsonto odityanisiweyo wePolyester-cotton T/C65/35 14.7 tex wawunobungakanani kunye nokusebenza kwawo komgangatho wavavanywa.Eyona nkqubo yokuvelisa i-hydroxypropyl methylcellulose yayimi ngolu hlobo lulandelayo: ubukhulu beqhekeza le-lye yayingu-35%;i-compression ratio ye-alkali cellulose yayiyi-2.4;Umlinganiselo womthamo we-liquid we-methane kunye ne-propylene oxide ngu-7: 3;nciphisa nge-isopropanol;uxinzelelo lokuphendula luyi-2.0MPaUbungakanani obulungiselelwe ngokuxuba i-hydroxypropyl methylcellulose kunye nesitashi esithile sine-COD ephantsi kwaye ihambelana nokusingqongileyo, kwaye zonke izikhombisi zokulinganisa zinokuthatha indawo yobungakanani bePVA.
Amagama angundoqo:isiqu se-hemp;i-hemp stalk cellulose ether;utywala polyvinyl;Ubungakanani be-cellulose ether
0.Intshayelelo
I-China lelinye lamazwe anobutyebi be-straw obutyebileyo.Imveliso yesityalo ingaphezulu kwe-700 yezigidi zeetoni, kwaye izinga lokusetyenziswa kweendiza li-3% kuphela ngonyaka.Isixa esikhulu semithombo yeendiza ayikasetyenziswa.I-straw sisityebi se-lignocellulosic yendalo ekrwada, enokusetyenziswa kwisondlo, isichumisi, i-cellulose derivatives kunye nezinye iimveliso.
Okwangoku, ukukhutshwa kongcoliseko lwamanzi amdaka kwinkqubo yokuvelisa ilaphu kuye kwaba ngowona mthombo mkhulu wongcoliseko.Imfuno yeoksijini yeekhemikhali yePVA iphezulu kakhulu.Emva kokuba amanzi amdaka amashishini aveliswa yi-PVA kwinkqubo yokuprinta kunye nokudaya ikhutshwe emlanjeni, iya kuthintela okanye itshabalalise ukuphefumla kwezinto eziphilayo zasemanzini.Ngapha koko, i-PVA yenza mandundu ukukhululwa kunye nokufuduka kwesinyithi esinzima kwintlenga kwimizimba yamanzi, nto leyo ebangela iingxaki ezinzulu zokusingqongileyo.Ukwenza uphando ngokutshintsha i-PVA nge-slurry eluhlaza, akufuneki kuphela ukuhlangabezana neemfuno zenkqubo yokulinganisa, kodwa kunye nokunciphisa ukungcoliswa kwamanzi kunye nomoya ngexesha lenkqubo yokulinganisa.
Kolu phononongo, i-hemp stalk cellulose ether-hydroxypropyl methylcellulose (HPMC) yalungiswa ukusuka kwizikhondo zenkunkuma yezolimo, kwaye inkqubo yayo yokuvelisa yaxoxwa.Kwaye xuba i-hydroxypropyl methylcellulose kunye nesayizi ethile yesitatshi njengobungakanani bokulinganisa, thelekisa nobungakanani bePVA, kwaye uxoxe ngokusebenza kwayo.
1. Linge
1 .1 Izixhobo kunye nezixhobo
Isikhondo seHemp, iHeilongjiang;i-polyester-cotton edibeneyo intambo T / C65 / 3514.7 tex;uzenzele we-hemp stalk cellulose ether-hydroxypropyl methylcellulose;I-FS-101, isitashi esilungisiweyo, i-PVA-1799, i-PVA-0588, i-Liaoning Zhongze Group Chaoyang Textile Co., Ltd.;ipropanol, ibakala leprimiyamu;ipropylene oxide, i-glacial acetic acid, i-sodium hydroxide, i-isopropanol, i-analytically pure;i-methyl chloride, i-nitrogen ephezulu.
Iketile yokusabela ye-GSH-3L, i-JRA-6 idijithi ibonisa idijithali yokuhlamba amanzi, i-DHG-9079A yokufudumeza kombane rhoqo ubushushu be-oveni yokomisa, i-IKARW-20 i-agitator yomatshini engaphezulu, i-ESS-1000 umatshini wokulinganisa isampulu, YG 061/PC imitha yamandla yomsonto omnye we-elektroniki, I-LFY-109B yokuvavanya umsonto wekhompyutha.
1.2 Ukulungiswa kwe-hydroxypropyl methylcellulose
1. 2. 1 Ukulungiswa kwefiber alkali
Hlukanisa i-hemp stalk, uyiqhekeze ibe yi-20 meshes nge-pulverizer, yongeza i-hemp stalk powder kwi-35% ye-NaOH ye-aqueous solution, kwaye uyicwilise kwiqondo lokushisa kwe-1.5 ~ 2.0 h.Cofa ifayibha yealkali efakiweyo ukuze ubungakanani be-alkali, i-cellulose kunye namanzi bube yi-1. 2:1.2:1.
1. 2. 2 Ukusabela kwe-Etherification
Phonsa i-alkali cellulose elungiselelwe kwi-kettle yokusabela, yongeza i-100 mL ye-isopropanol njenge-diluent, yongeza i-liquid 140 mL ye-methyl chloride kunye ne-60 mL ye-propylene oxide, i-vacuumze, kwaye icinezele kwi-2.0 MPa, ngokukhawuleza uphakamise ubushushu ukuya kwi-45 ° C kwiiyure ze-1-2, kwaye uphendule kwi-75 ° C kwiiyure ze-1-2 ukulungiselela i-hydroxypropyl methylcellulose.
1. 2. 3 Emva kokulungiswa
Lungisa i-pH ye-etherified cellulose ether kunye ne-glacial acetic acid ukuya kwi-6.5 ~ 7.5, ihlanjwe ngepropanol kathathu, kwaye yomiswe kwi-oven kwi-85 ° C.
1.3 Inkqubo yokuvelisa i-hydroxypropyl methylcellulose
1. 3. 1 Impembelelo yesantya sokujikeleza ekulungiseleleni i-cellulose ether
Ngokuqhelekileyo i-etherification reaction yi-heterogeneous reaction ukusuka ngaphakathi ukuya ngaphakathi.Ukuba akukho mandla angaphandle, kunzima ukuba i-agent etherification ingene kwi-crystallization ye-cellulose, ngoko ke kuyimfuneko ukudibanisa ngokupheleleyo i-etherification agent kunye ne-cellulose ngendlela yokuvuselela.Kolu phononongo, kusetyenziswe i-reactor yoxinzelelo oluphezulu.Emva kovavanyo oluphindaphindiweyo kunye nemiboniso, isantya esikhethiweyo sokujikeleza sasiyi-240-350 r / min.
1. 3. 2 Isiphumo sokugxilwa kwe-alkali ekulungiseleleni i-cellulose ether
I-alkali inokutshabalalisa i-compact structure ye-cellulose ukuze idumbe, kwaye xa ukuvuvukala kwendawo ye-amorphous kunye nommandla we-crystalline uvame ukuhambelana, i-etherification ihamba kakuhle.Kwinkqubo yokuvelisa i-cellulose ether, inani le-alkali elisetyenziswe kwinkqubo ye-cellulose alkalization inempembelelo enkulu ekusebenzeni kwe-etherification yeemveliso ze-etherification kunye neqondo lokutshintshwa kwamaqela.Kwinkqubo yokulungiselela i-hydroxypropyl methylcellulose, njengoko ukuxinwa kwe-lye kwanda, umxholo wamaqela e-methoxyl nawo uyanda;ngokuchaseneyo, xa i-concentration ye-lye iyancipha, i-hydroxypropyl methylcellulose Umxholo wesiseko mkhulu.Umxholo weqela le-methoxy uhambelana ngokuthe ngqo kwi-concentration ye-lye;Umxholo we-hydroxypropyl uhambelana ngokuphambeneyo noxinaniso lwe-lye.Inxalenye enkulu ye-NaOH ikhethwe njenge-35% emva kovavanyo oluphindaphindiweyo.
1. 3. 3 Ifuthe le-alkali cellulose pressing ratio ekulungiseleleni i-cellulose ether
Injongo yokucinezela i-alkali fiber kukulawula umxholo wamanzi we-alkali cellulose.Xa umlinganiselo wokucinezela uncinci kakhulu, umthamo wamanzi uyanda, ukuxinwa kwe-lye kuncipha, izinga le-etherification liyancipha, kwaye i-etherification agent i-hydrolyzed kunye neempendulo zecala zanda., ukusebenza kwe-etherification kuyancipha kakhulu.Xa umlinganiselo wokucinezela ukhulu kakhulu, umthamo wamanzi uyancipha, i-cellulose ayikwazi ukudumba, kwaye ayinayo i-reactivity, kwaye i-etherification agent ayikwazi ukudibanisa ngokupheleleyo ne-alkali cellulose, kwaye ukusabela akulingani.Emva kweemvavanyo ezininzi kunye nokucinezela uthelekiso, kwagqitywa ukuba umlinganiselo we-alkali, amanzi kunye ne-cellulose wawuyi-1. 2: 1.2:1.
1. 3. 4 Impembelelo yobushushu ekulungiseleleni i-cellulose ether
Kwinkqubo yokulungiselela i-hydroxypropyl methylcellulose, lawula kuqala ubushushu kwi-50-60 ° C kwaye uyigcine kwiqondo lokushisa elingaguqukiyo kwiiyure ezi-2.Ukusabela kwe-hydroxypropylation kunokwenziwa malunga ne-30 ℃, kwaye izinga le-hydroxypropylation reaction rate linyuka kakhulu kwi-50 ℃;nyusa kancinci iqondo lobushushu ukuya kuma 75 ℃, kwaye ulawule ubushushu iiyure ezi-2.Kwi-50 ° C, i-methylation reaction ayinakwenzeka, kwi-60 ° C, izinga lokuphendula licotha, kwaye kwi-75 ° C, i-methylation reaction rate ikhawuleza kakhulu.
Ukulungiswa kwe-hydroxypropyl methylcellulose kunye nolawulo lweqondo lokushisa oluninzi alikwazi ukulawula kuphela ibhalansi ye-methoxyl kunye namaqela e-hydroxypropyl, kodwa kunceda ukunciphisa ukuphendulwa kwecala kunye nokunyanga emva kokunyanga, kunye nokufumana iimveliso ezinesakhiwo esifanelekileyo.
1. 3. 5 Isiphumo somlinganiselo wedosi ye-etherification agent kulungiselelo lwe-cellulose ether.
Ekubeni i-hydroxypropyl methylcellulose iyi-ether exubeneyo engeyo-ionic eqhelekileyo, amaqela e-methyl kunye ne-hydroxypropyl afakwa endaweni yamatyathanga e-hydroxypropyl methylcellulose macromolecular, oko kukuthi, i-C eyahlukileyo kwindawo nganye yeringi yeglucose.Kwelinye icala, umlinganiselo wokuhanjiswa kwe-methyl kunye ne-hydroxypropyl inokusasazwa okukhulu kunye nokungakhethi.Ukunyibilika kwamanzi kwe-HPMC kuhambelana nomxholo weqela le-methoxy.Xa umxholo weqela le-methoxy liphantsi, linokuchithwa kwi-alkali enamandla.Njengoko umxholo we-methoxyl usanda, uba novelwano ngakumbi ekudumbeni kwamanzi.Ukuphakama komxholo we-methoxy, ngcono ukunyibilika kwamanzi, kwaye inokuqulunqwa ibe ludaka.
Isixa se-etherifying agent methyl chloride kunye nepropylene oxide inempembelelo ngqo kumxholo we-methoxyl kunye ne-hydroxypropyl.Ukuze ulungiselele i-hydroxypropyl methylcellulose kunye nokunyibilika kakuhle kwamanzi, umlinganiselo womthamo we-methyl chloride kunye nepropylene oxide ukhethwe njenge-7: 3.
1.3.6 Eyona nkqubo yokuvelisa i-hydroxypropyl methylcellulose
Isixhobo sokusabela yi-high-pressure yavuselelwa ireactor;isantya sokujikeleza yi-240-350 r / min;ubukhulu beqhekeza le-lye yi-35%;i-compression ratio ye-alkali cellulose yi-2. 4;I-Hydroxypropoxylation kwi-50 ° C kwiiyure ze-2, i-methoxylation kwi-75 ° C kwiiyure ze-2;i-etherification agent methyl chloride kunye nepropylene oxide liquid volume ratio 7: 3;ivacuum;uxinzelelo lwe-2.0 MPa;idiluent yi isopropanol.
2. Ukufunyanwa kunye nesicelo
2.1 I-SEM ye-hemp cellulose kunye ne-alkali cellulose
Ukuthelekisa i-cellulose ye-hemp engaphathwanga kunye ne-hemp cellulose ephathwa nge-35% ye-NaOH, kunokufunyaniswa ngokucacileyo ukuba i-alkalized cellulose ineentanda ezingaphezulu, indawo enkulu, umsebenzi ophezulu kunye nokuphendula okulula kwe-etherification.
2.2 Ukumiselwa kwe-Infrared Spectroscopy
Iselulosi ekhutshwe kwizikhondo ze-hemp emva konyango kunye ne-infrared spectrum ye-HPMC elungiswe kwi-hemp stalk cellulose.Phakathi kwabo, ibhendi yokufunxa eyomeleleyo kunye ebanzi kwi-3295 cm -1 yibhendi yokufunxa eyolulayo yeqela le-HPMC lombutho we-hydroxyl, ibhendi yokufunxa kwi-1250 ~ 1460 cm -1 yibhendi yokufunxa ye-CH, CH2 kunye ne-CH3, kunye ne-absorption. ibhendi kwi-1600 cm -1 yibhendi yokufunxa yamanzi kwibhanti yokufunxa i-polymer.Ibhendi yokufunxa kwi-1025cm -1 yibhendi yokufunxa ye-C - O - C kwipolymer.
2.3 Ukuzimisela kweViscosity
Thatha isampuli ye-cannabis stalk cellulose ether isampuli kwaye uyifake kwi-beaker ukuze ulungiselele isisombululo se-2% samanzi, usishukumise kakuhle, ulinganise i-viscosity yayo kunye nokuzinza kwe-viscosity kunye ne-viscometer, kwaye ulinganise umyinge we-viscosity ngamaxesha e-3.I-viscosity yesampula ye-cannabis stalk cellulose ether isampuli yayiyi-11.8 mPa·s.
2.4 Ubungakanani besicelo
2.4.1 Ulungelelwaniso oluludaka
I-slurry ilungiselelwe kwi-1000mL ye-slurry eneqhekeza elikhulu le-3.5%, ixutywe ngokulinganayo kunye nomxube, ize ifakwe kwindawo yokuhlambela amanzi kwaye ishushu kwi-95 ° C ngeyure eli-1.Ngexesha elifanayo, qaphela ukuba isitya sokupheka se-pulp kufuneka sitywinwe kakuhle ukukhusela ukuxinwa kwe-slurry ekunyuseni ngenxa yokunyuka kwamanzi.
2.4.2 Ukwenziwa kwe-slurry pH, ukuxutywa kunye neCOD
Xuba i-hydroxypropyl methyl cellulose kunye nobukhulu obuthile besitatshi ukulungiselela i-slurry (1 # ~ 4 #), kwaye uthelekise kunye ne-PVA formula slurry (0 #) ukuhlalutya i-pH, ukungahambi kakuhle kunye ne-COD.Umsonto odityanisiweyo we-polyester-cotton T/C65/3514.7 we-tex wawulinganiswe kumatshini wesampulu we-ESS1000, kwaye ukusebenza kwawo kwahlalutywa.
Ingabonwa ukuba i-hemp stalk cellulose ether eyenziwe yasekhaya kunye nobungakanani besitatshi obukhethekileyo 3 # zezona zilungelelaniso zobungakanani: 25% hemp stalk cellulose ether, 65% modified starch kunye ne-10% FS-101.
Yonke idatha yokulinganisa ithelekiswa nedatha yobungakanani bePVA yobungakanani, ebonisa ukuba ubungakanani obuxubeneyo behydroxypropyl methylcellulose kunye nesitatshi esithile sinomgangatho olungileyo wokusebenza;i-pH yayo isondele ekungathathi hlangothi;i-hydroxypropyl methylcellulose kunye ne-starch ethile I-COD (17459.2 mg / L) yesitashi esixubileyo esixubileyo sasiphantsi kakhulu kunobukhulu be-PVA (26448.0 mg / L), kunye nokusebenza kokusingqongileyo kwakukuhle.
3. Isiphelo
Eyona nkqubo yokuvelisa i-hemp stalk cellulose ether-hydroxypropyl methylcellulose yokulinganisa imi ngolu hlobo lulandelayo: i-high-pressure yavuselelwa ireactor enesantya sokujikeleza se-240-350 r/min, iqhezu lobunzima be-lye ye-35%, kunye ne-compression ratio. yealkali cellulose 2.4, iqondo lobushushu methylation yi 75 ℃, kunye nobushushu hydroxypropylation yi 50 ℃, nganye igcinwe iiyure ezi-2, ulwelo umthamo ratio methyl chloride kunye propylene oxide yi 7: 3, vacuum, uxinzelelo reaction yi 2.0 MPa, I-isopropanol yi-diluent.
I-hemp stalk cellulose ether yasetyenziselwa ukubuyisela ubungakanani bePVA yokulinganisa, kwaye umlinganiselo ofanelekileyo wobungakanani wawu: 25% hemp stalk cellulose ether, 65% isitatshi esilungisiweyo kunye ne-10% FS-101.I-pH ye-slurry yi-6.5 kunye ne-COD (17459.2 mg / L) iphantsi kakhulu kune-PVA slurry (26448.0 mg / L), ebonisa ukusebenza kakuhle kokusingqongileyo.
I-hemp stalk cellulose ether yayisetyenziselwa ukulinganisa endaweni yesayizi yePVA ukulinganisa i-polyester-cotton edityanisiweyo yalaphu T/C 65/3514.7tex.Isalathiso sobungakanani siyalingana.I-hemp stalk entsha ye-cellulose ether kunye nesitatshi esilungisiweyo sobukhulu obuxutyiweyo bungathatha indawo yesayizi ye-PVA.
Ixesha lokuposa: Feb-20-2023